Compaq Personal Computer 400 486 DX2 40 MHZ 250 MB 4 MB 95 User Manual
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Notice  
The information in this guide is subject to change without notice.  
Compaq Computer Corporation shall not be liable for technical or editorial  
errors or omissions contained herein; nor for incidental or consequential  
damages resulting from the furnishing, performance, or use of this  
material.  
This guide contains information protected by copyright. No part of this  
guide may be photocopied or reproduced in any form without prior written  
consent from Compaq Computer Corporation.  
Copyright 1994, 1995 Compaq Computer Corporation.  
All rights reserved. Printed in the U.S.A.  
Compaq, Deskpro, LTE, Contura, Presario, ProLinea  
Registered U. S. Patent and Trademark Office.  
The software described in this guide is furnished under a license  
agreement or nondisclosure agreement. The software may be used or copied  
only in accordance with the terms of the agreement.  
Product names mentioned herein may be trademarks and/or registered  
trademarks of their respective companies.  
MAINTENANCE AND SERVICE GUIDE  
COMPAQ CONTURA 400 FAMILY OF PERSONAL COMPUTERS  
Second Edition (June 1995)  
First Edition (September 1994)  
Part Number 147951-002  
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Preface  
This Maintenance and Service Guide is used for reference when servicing  
the Compaq Contura 400 Family of Personal Computers.  
Compaq Computer Corporation reserves the right to make changes to the  
Compaq Contura 400 Family of Personal Computers without notice.  
Symbols  
The following words and symbols mark special messages throughout this  
guide:  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Text set off in this manner indicates that failure to follow directions  
could result in bodily harm or loss of life.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Text set off in this manner indicates that failure to follow directions  
could result in damage to equipment or loss of data.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
IMPORTANT: Text set off in this manner presents clarifying information or  
specific instructions.  
NOTE: Text set off in this manner presents commentary, sidelights, or  
interesting points of information.  
Technician Notes  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Only authorized technicians trained by Compaq should repair this  
equipment. All troubleshooting and repair procedures are detailed to allow  
only subassembly/module level repair. Because of the complexity of the  
individual boards and subassemblies, no one should attempt to make repairs  
at the component level or to make modifications to any printed circuit  
board. Improper repairs can create a safety hazard. Any indications of  
component replacement or printed circuit board modifications may void any  
warranty.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Locating Additional Information  
The following documentation is available:  
o Compaq Contura 400 Family Documentation:  
- QUICK SETUP  
- BEYOND SETUP  
- ONLINE USER'S GUIDE  
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o Compaq Service Quick Reference Guide  
o Service Training Guides  
o Compaq Service Advisories and Bulletins  
o Compaq QuickFind  
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Chapter 1. Illustrated Parts Catalog  
Introduction  
Chapter 1.1 Illustrated Parts Breakdown  
The computer combines a display assembly and system unit module. The  
display and system unit module are joined together by clutches on either  
side secured by screws in the chassis and display enclosure allowing it to  
open and close. The system unit module is secured to the CPU base by screw  
locks in the rear and screws in the bottom of the system unit enclosure.  
The display assembly is secured by screws installed in the front bezel of  
the display enclosure.  
This chapter provides a description of the system unit module, display  
assembly, docking base, and monitor support cover. It includes a complete  
parts breakdown.  
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Chapter 1.2 Serial Number  
The computer serial numbers should be provided to Compaq whenever  
requesting information or ordering spare parts. The serial number is  
located on the bottom of the computer.  
The serial number on the Docking Base is located on the rear of the base.  
Chapter 1.3 System Unit Module Overview  
The system unit module (Figure 1-4) contains the following upgradable  
components:  
o Hard drive  
o Memory expansion board  
o Processor upgrade (Contura 400 only)  
A complete list of replaceable parts is included in Table 1-1. Major  
components include:  
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o Battery pack and compartment components  
o Keyboard assembly  
o Integrated trackball assembly  
o Diskette drive  
o System board  
o PC Card (PCMCIA) ejector rails and components  
The hard drive, memory expansion board, and battery pack are accessed from  
the bottom of the computer. To service the remaining system unit module  
components, the keyboard assembly must be removed. Most major components  
connect directly to the system board by connectors. The only cables in  
this unit are the display assembly cable, the display ground cable, and  
diskette drive cable.  
Compaq Contura Models  
Table 1-1 lists the Compaq Contura 400 Family of Personal Computer Models  
and standard features.  
Table 1-1. Compaq Contura 400 Family of Personal Computer Models  
===========================================================================  
Model  
Processor  
Hard Drive Memory  
Display  
===========================================================================  
Contura 400  
Contura 400  
Contura 400C  
486 DX2/40 MHz  
486 DX2/40 MHz  
486 DX2/40 MHz  
170 MB  
250 MB  
250 MB  
250 MB  
250 MB  
250 MB  
350 MB  
350 MB  
350 MB  
420 MB  
420 MB  
4 MB  
4 MB  
4 MB  
4 MB  
4 MB  
4 MB  
4 MB  
4 MB  
4 MB  
8 MB  
8 MB  
8 MB  
8 MB  
8 MB  
9.5 in Monochrome  
9.5 in Monochrome  
9.5 in Color STN  
8.4 in. Color TFT  
9.5 in Monochrome  
9.5 in Color STN  
9.5 in Color STN  
8.4 in. Color TFT  
10.4 in. Color STN  
10.4 in. Color STN  
10.4 in. Color TFT  
10.4 in. Color STN  
10.4 in. Color STN  
10.4 in. Color TFT  
Contura 400CX 486 DX2/40 MHz  
Contura 410  
Contura 410C  
Contura 410C  
486 DX2/50 MHz  
486 DX2/50 MHz  
486 DX2/50 MHz  
Contura 410CX 486 DX2/50 MHz  
Contura 420C  
Contura 420C  
486 DX4/75 MHz  
486 DX4/75 MHz  
Contura 420CX 486 DX4/75 MHz  
Contura 430C  
Contura 430C  
486 DX4/100 MHz 420 MB  
486 DX4/100 MHz 720 MB  
Contura 430CX 486 DX4/100 MHz 720 MB  
---------------------------------------------------------------------------  
Note: Processor, hard drive and memory upgrades are available for most  
models  
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===========================================================================  
Models 400 and 410  
This section provides a description of the system unit module components  
for Models 400 and 410. These components are accessed from the bottom of  
the computer:  
o Hard drive -- The hard drive is easily replaced or upgraded from the  
bottom of the computer. Remove two screws from the hard drive  
compartment cover to access the hard drive. The hard drive mounts to the  
system chassis with a hard drive bracket and connects directly to the  
system board with no intervening cables. The hard drive bracket attaches  
to the hard drive with four screws.  
o Memory expansion -- System memory can be upgraded with optional memory  
expansion boards. An expansion board is added or replaced from the  
bottom of the computer through the memory compartment cover. The memory  
expansion board connects directly to the system board with two  
connectors.  
o Battery pack -- The Nickel Metal Hydride battery pack is accessed  
through the battery compartment.  
To access the remaining system unit components, open the computer and  
remove the keyboard assembly. These components include the following:  
o Integrated trackball assembly -- The mechanical trackball is centrally  
located at the bottom of the keyboard assembly. The assembly consists of  
the trackball, retaining ring, and connector. The trackball assembly  
connects directly to the system board and is secured by one screw. It  
cannot be replaced with the optical trackball used in the Models 420 and  
430. The mechanical trackball and optical trackball are not  
interchangeable.  
o System board -- The system board is mounted directly to the system  
chassis. All removable components connected to the system board, except  
for the PC Card rails, must be removed prior to removing the system  
board. The system board is unique and cannot be replaced by the one  
used in the Models 420 and 430.  
o Processor upgrade -- Systems that come with the DX2/40 MHz processor can  
be upgraded to the DX2/50 MHz processor. Place the upgrade processor into  
the two connectors on the system board (Refer to "Removal and  
Replacement Procedures, Section 3.11). Once installed, the processor  
overrides control of the system board processor. The system board  
processor is not removable.  
o Real-Time Clock Battery -- This battery is located directly behind the  
Trackball.  
o PC Card rails -- The PC Card rails are replaceable and are secured by  
two screws from the bottom of the system board and a clip on top of the  
rails. The rails are not interchangeable with those used in Models 420  
and 430. The clip is common between all models. The header attaches  
directly to the system board and cannot be removed. The top and bottom  
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PC Card ejection levers are replaceable, but are not interchangeable  
with those used in the Models 420 and 430.  
o Diskette drive -- The diskette drive attaches to the system board by a  
bracket and three screws. It is connected by a diskette drive cable and  
LIF connector. The bracket attaches to the drive with four screws. The  
drive is protected by an insulator between the system board and the  
drive.  
Models 420 and 430  
This section provides a description of the system unit module components  
for Models 420 and 430. These components are accessed from the bottom of  
the computer:  
o Hard drive -- The hard drive is easily replaced or upgraded from the  
bottom of the computer. Remove two screws from the hard drive  
compartment cover to access the hard drive. The hard drive mounts to the  
system chassis with a hard drive bracket and connects directly to the  
system board with no intervening cables. The hard drive bracket attaches  
to the hard drive with four screws.  
o Memory expansion -- System memory can be upgraded with optional memory  
expansion boards. An expansion board is added or replaced from the  
bottom of the computer through the memory compartment cover. The memory  
expansion board connects directly to the system board with two connectors.  
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o Battery pack -- The Nickel Metal Hydride battery pack is accessed  
through the battery compartment.  
To access the remaining system unit components, open the computer and  
remove the keyboard assembly. These components include the following:  
o Integrated trackball assembly -- This optical trackball is centrally  
located at the bottom of the keyboard assembly. The assembly consists of  
the trackball, retaining ring, and connector. The trackball assembly  
connects directly to the system board and is secured by two screws. It  
cannot be replaced with the mechanical trackball used in the Compaq  
Models 400 and 410. The optical trackball and mechanical trackball are  
not interchangeable among computer models.  
o System board -- The system board is mounted directly to the system  
chassis. All removable components connected to the system board, except  
for the PC Card rails, must be removed prior to removing the system  
board. The system board is unique and cannot be replaced by the one  
used in the Compaq Models 400 and 410.  
o Processor upgrade -- Models 420 and 430 are equipped with either a  
DX4/75 MHz or a DX4/100 MHz processor on the system board. There are no  
upgrade provisions for these models.  
o Real-Time Clock Battery -- This battery is located in the left rear area  
of the system board.  
o PC Card rails -- The PC Card rails are replaceable and are secured by  
two screws from the bottom of the system board and a clip on top of the  
rails. The rails are not interchangeable with those used in Models 420  
and 430. The clip is common between all models. The header attaches  
directly to the system board and cannot be removed. The top and bottom  
PC Card ejection levers are replaceable, but are not interchangeable  
with those used in the Models 400 and 410.  
o Diskette drive -- The diskette drive attaches to the system board by a  
bracket and three screws. It is connected by a diskette drive cable and  
LIF connector. The bracket attaches to the drive with four screws. The  
drive is protected by an insulator between the system board and the  
drive.  
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Chapter 1.4 Display Assembly Overview  
Display Assembly Description  
This section provides a description of the display assembly and  
components.  
All display assemblies (Figure 1-5 and Figure 1-6) include the following  
replaceable parts:  
o Bezel  
o Enclosure latches  
o Inverter board  
o Liquid crystal display (LCD) panel  
o Shield  
o Enclosure  
o Display cable and display ground cable  
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To replace the display assembly, the assembly must be removed from the  
system unit module. This is done by removing the keyboard assembly,  
disconnecting the display cable and display ground cable from the system  
unit module, removing the tilt feet and handle brackets, removing the rear  
clutch screws, and lifting off the display assembly.  
To service display components, do not remove the display assembly from the  
system unit module (unless the display enclosure or clutch replacement is  
required). Access display components (inverter board or latches) by  
removing the bezel secured with four screws on the front of the display.  
The display cable is a prefolded, flex cable that connects to the display  
inverter board with a low insertion force (LIF) connector. The other end  
of the display cable is exposed at the bottom of the display enclosure and  
connects to the system board with a zero insertion force (ZIF) slide  
connector.  
The display ground cable connects to the display shield on one end, and  
the other end clips to a LIF-type spring clip located above the serial  
port between the system board and system chassis.  
The display inverter board is aligned to the right of the display  
enclosure with pins. One end connects to the display cable; the other end  
connects to the backlight cable of the LCD panel.  
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Chapter 1.5 Docking Base  
The docking base includes the following replaceable parts:  
o Battery door  
o Feet  
o Handle  
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Chapter 1.6 Monitor Support Cover  
The monitor support cover is used with the docking base. The foot on the  
monitor support cover is the only replaceable part.  
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Chapter 1.7 System Unit Module Parts  
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Table 1-2. System Unit Module -- Models 400 and 410  
===========================================================================  
Spare Part  
Description  
Number  
Notes  
===========================================================================  
1. Base enclosure  
147856-001  
Includes:  
a. PC Card eject levers, pin, door,  
and spring  
b. battery latch button and spring  
c. handle bracket, screws and  
washers  
d. battery shield, insulator  
e. tilt foot and screws  
f. warning label *  
g. anti-skid pads *  
h. memory door *  
---------------------------------------------------------------------------  
2. System board  
- 486 DX2/40 MHz  
- 486 DX2/50 MHz  
Include PC Card ejector rails, hard  
drive insulators, and gasket.  
147944-001  
147621-001  
---------------------------------------------------------------------------  
3. Diskette drive  
bracket  
---------------------------------------------------------------------------  
4. Diskette drive 147963-001  
147857-001  
---------------------------------------------------------------------------  
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5. Processor upgrade  
486 DX2/50 MHz  
169644-001  
---------------------------------------------------------------------------  
6. Real-time clock  
battery  
117099-001  
---------------------------------------------------------------------------  
7. Mechanical  
Trackball  
147876-001  
---------------------------------------------------------------------------  
8. PC Card ejection  
assembly  
Includes the following and screws *.  
a. rails  
b. clip  
147871-001  
c. screws *  
---------------------------------------------------------------------------  
9. Chassis 147865-001  
---------------------------------------------------------------------------  
10. Clutches  
147858-002  
Includes:  
a. left  
b. right  
---------------------------------------------------------------------------  
11. Hard drive *  
- 350 MB  
- 250 MB  
- 170 MB  
189111-001  
199233-001  
169685-001  
Does not include hard drive bracket.  
---------------------------------------------------------------------------  
12. Hard drive  
bracket *  
147872-001  
---------------------------------------------------------------------------  
13. Memory expansion  
board *  
- 4 MB  
- 8 MB  
- 16 MB  
- 24 MB  
147654-001  
147656-001  
147658-001  
189261-001  
---------------------------------------------------------------------------  
14. NiMH battery  
pack *  
---------------------------------------------------------------------------  
15. Screws kit * 147885-001  
190626-001  
---------------------------------------------------------------------------  
* Not Shown  
===========================================================================  
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Table 1-3. System Unit Module -- Models 420 and 430  
===========================================================================  
Spare Part  
Description  
Number  
Notes  
===========================================================================  
1. Base enclosure  
189239-001  
Includes:  
a. PC Card eject levers, pin, door,  
and spring  
b. battery latch button and spring  
c. handle bracket, screws and  
washers  
d. battery shield, insulator  
e. tilt foot and screws  
f. warning label *  
g. anti-skid pads *  
h. memory door *  
---------------------------------------------------------------------------  
2. System board  
- 486 DX4/75 MHz  
4 MB  
Includes PC Card ejector rails,  
hard drive insulators, and gasket  
189115-001  
189116-001  
- 486 DX4/75 MHz  
8 MB  
- 486 DX4/100 MHz 189134-001  
8 MB  
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---------------------------------------------------------------------------  
3. Diskette drive  
bracket  
---------------------------------------------------------------------------  
4. Diskette drive 147963-001  
189240-001  
---------------------------------------------------------------------------  
5. Real-time clock  
battery  
117099-001  
---------------------------------------------------------------------------  
6. Optical Trackball  
assembly  
189197-001  
---------------------------------------------------------------------------  
7. PC Card ejection  
assembly  
Includes the following and screws *.  
a. rails  
b. clip  
189242-001  
c. screws *  
---------------------------------------------------------------------------  
8. Chassis 189241-001  
---------------------------------------------------------------------------  
9. Clutches  
147858-001  
Includes:  
a. left  
b. right  
---------------------------------------------------------------------------  
10. Hard drive *  
- 720 MB  
Does not include hard drive bracket.  
189156-001  
189132-001  
189112-001  
189111-001  
- 540 MB  
- 420 MB  
- 350 MB  
---------------------------------------------------------------------------  
11. Hard drive  
bracket *  
147872-001  
---------------------------------------------------------------------------  
12. Memory expansion  
board *  
- 4 MB  
- 8 MB  
- 16 MB  
- 24 MB  
147654-001  
147656-001  
147658-001  
189261-001  
---------------------------------------------------------------------------  
13. NiMH battery  
pack *  
---------------------------------------------------------------------------  
14. Screws kit * 147885-001  
190626-001  
---------------------------------------------------------------------------  
* Not Shown  
===========================================================================  
Chapter 1.8 Monochrome Display Assembly Parts  
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Table 1-4. Monochrome Display Assembly -- Models 400 and 410  
===========================================================================  
Description  
Spare Part Number  
Notes  
===========================================================================  
1. Display bezel  
147882-001  
2. Backlight inverter  
board  
147622-001  
147877-001  
147884-001  
3. Display panel  
4. Display cables  
Includes labels and shield  
Includes:  
a. display cable  
b. display ground cable  
5. Display clutch  
(left and right)  
147858-001  
147880-001  
147885-001  
Includes screws for handle  
bracket, washer, tilt feet  
6. Display enclosure  
kit  
Includes enclosure, latch,  
spring, and logo  
7. Screw kit *  
---------------------------------------------------------------------------  
* Not Shown  
===========================================================================  
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Chapter 1.9 Color STN (9.5 inch) Display Assembly Parts  
Table 1-5. CSTN (9.5 inch) Display Assembly -- Models 400 and 410  
===========================================================================  
Description  
Spare Part Number  
Notes  
===========================================================================  
1. Display bezel  
147883-001  
2. Backlight inverter  
board  
147624-001  
147878-001  
147884-001  
3. Display panel  
4. Display cables  
Includes labels and shield  
Includes:  
a. display cable  
b. display ground cable  
5. Display clutch  
(left and right)  
147858-001  
147881-001  
147885-001  
Includes screws for handle  
bracket, washer, tilt feet  
6. Display enclosure  
kit  
Includes enclosure, latch,  
spring, and logo  
7. Screw kit *  
---------------------------------------------------------------------------  
* Not Shown  
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===========================================================================  
Chapter 1.10 Color STN (10.4 inch) Display Assembly Parts  
Table 1-6. CSTN (10.4 inch) Display Assembly -- Models 420 and 430  
===========================================================================  
Spare Part  
Description  
Number  
Notes  
===========================================================================  
1. Display bezel  
189246-001  
2. Backlight inverter  
board  
189135-001  
189113-001  
189247-001  
3. Display panel  
4. Display cables  
Includes labels and shield  
Includes:  
a. display cable  
b. display ground cable  
c. XOVER board  
5. Display clutch  
(left and right)  
Includes screws for handle  
bracket, washer, tilt feet  
147858-001  
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6. Display enclosure  
kit  
Includes enclosure, latch,  
spring, logo and pad for  
Sharp CSTN  
189245-001  
147885-001  
7. Screw kit *  
---------------------------------------------------------------------------  
* Not Shown  
===========================================================================  
Chapter 1.11 Color TFT (8.4 inch) Display Assembly Parts  
Table 1-7. CTFT (8.4 inch) Display Assembly -- Models 400 and 410  
===========================================================================  
Spare Part  
Description  
Number  
Notes  
===========================================================================  
1. Display bezel  
147869-001  
2. Backlight inverter  
board  
147624-001  
147879-001  
147884-001  
3. Display panel  
4. Display cables  
Includes labels and shield  
Includes:  
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a. display cable  
b. display ground cable  
5. Display clutch  
(left and right)  
Includes screws for handle  
bracket, washer, tilt feet  
147858-001  
6. Display enclosure  
kit  
Includes enclosure, latch,  
spring, and logo  
147881-001  
147885-001  
7. Screw kit *  
---------------------------------------------------------------------------  
* Not Shown  
===========================================================================  
Chapter 1.12 Color TFT (10.4 inch) Display Assembly Parts  
Table 1-8. CTFT (10.4 inch) Display Assembly -- Models 420 and 430  
===========================================================================  
Spare Part  
Description  
Number  
Notes  
===========================================================================  
1. Display bezel  
189244-001  
2. Backlight inverter  
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board  
189136-001  
189114-001  
189247-001  
3. Display panel  
4. Display cables  
Includes labels and shield  
Includes:  
a. display cable  
b. display ground cable  
5. Display clutch  
(left and right)  
Includes screws for handle  
bracket, washer, tilt feet  
147858-001  
6. Display enclosure  
kit  
Includes enclosure, latch,  
spring, and logo.  
189243-001  
147885-001  
7. Screw kit *  
---------------------------------------------------------------------------  
* Not Shown  
===========================================================================  
Chapter 1.13 Keyboards  
Table 1-9. Contura Notebook Keyboards  
===========================================================================  
Description  
Spare Part Number  
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===========================================================================  
1. CPU Cover Includes:  
a. PC Card door  
147860-001  
b. spring *  
c. indicator panel  
d. light deflector  
2. U.S.  
147875-001  
3. U.K.  
147875-003 *  
147875-004 *  
147875-005 *  
147875-006 *  
147875-007 *  
147875-008 *  
147875-009 *  
147875-010 *  
147875-011 *  
147875-012 *  
147875-013 *  
147875-016 *  
147875-018 *  
147875-019 *  
147875-033 *  
147875-035 *  
4. German  
5. French  
6. Italian  
7. Spanish  
8. Danish  
9. Norwegian  
10. Swedish/Finnish  
11. Swiss  
12. French Canadian  
13. Portuguese  
14. Latin American  
15. Belgian  
16. Japanese  
17. Korean  
18. Brazilian  
---------------------------------------------------------------------------  
* Not Shown  
===========================================================================  
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Table 1-10. Contura Enhanced Keyboards  
===========================================================================  
Description  
Spare Part Number  
===========================================================================  
1. Enhanced II Keyboard - Domestic  
2. Enhanced III Keyboard - U.K.  
140536-101  
140536-103  
3. Enhanced III Keyboard - German  
4. Enhanced III Keyboard - French  
5. Enhanced III Keyboard - Italian  
6. Enhanced III Keyboard - Spanish  
7. Enhanced III Keyboard - Danish  
8. Enhanced III Keyboard - Norwegian  
9. Enhanced III Keyboard - Swedish/Finnish  
10. Enhanced III Keyboard - Swiss  
11. Enhanced III Keyboard - French Canadian  
140536-104 *  
140536-105 *  
140536-106 *  
140536-107 *  
140536-108 *  
140536-109 *  
140536-110 *  
140536-111 *  
140536-112 *  
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12. Enhanced III Keyboard - Portuguese  
13. Enhanced III Keyboard - Turkish  
14. Enhanced III Keyboard - Greek  
15. Enhanced III Keyboard - Latin American  
16. Enhanced III Keyboard - Arabic  
17. Enhanced III Keyboard - Belgian  
18. Enhanced III Keyboard - Japanese  
19. Enhanced III Keyboard - BHCSY **  
20. Enhanced III Keyboard - Hungarian  
21. Enhanced III Keyboard - Polish  
22. Enhanced III Keyboard - Slovakian  
23. Enhanced III Keyboard - Russian  
24. Enhanced III Keyboard - Czech  
25. Enhanced III Keyboard - Thai  
26. Enhanced III Keyboard - Beijing  
27. Enhanced III Keyboard - Segul  
28. Enhanced III Keyboard - Taipei  
29. Enhanced III Keyboard - Brazil  
140536-113 *  
140536-114 *  
140536-115 *  
140536-116 *  
140536-117 *  
140536-118 *  
140536-119 *  
140536-120 *  
140536-121 *  
140536-122 *  
140536-123 *  
140536-124 *  
140536-129 *  
140536-130 *  
140536-132 *  
140536-133 *  
140536-134 *  
140536-135 *  
---------------------------------------------------------------------------  
* Not Shown  
** Bosnia-Herzegovina, Croatia, Slovenia, and Yugoslavia  
===========================================================================  
Chapter 1.14 Cables (Models 400 and 410)  
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Table 1-11. Cables for Models 400 and 410  
===========================================================================  
Description  
Spare Part Number  
===========================================================================  
1. Display cables  
147884-001  
a. CSTN (9.5 in) Models 400 and 410  
b. MSTN (9.5 in) (Model 400 only)  
c. CTFT (8.4 in) Models 400 and 410  
d. Ground cable for Models 400 and 410  
---------------------------------------------------------------------------  
2. Diskette cable 147866-001  
===========================================================================  
Chapter 1.15 Cables (Models 420 and 430)  
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Table 1-12. Cables for Models 420 and 430  
===========================================================================  
Description  
Spare Part Number  
===========================================================================  
1. Display cables  
189247-001  
a. CTFT (10.4 in) Models 420 and 430  
b. CSTN (10.4 in) Models 420 and 430  
c. XOVER board for CSTN (10.4 in) only  
d. Ground cable for Models 420 and 430  
---------------------------------------------------------------------------  
2. Diskette cable 147866-001  
===========================================================================  
Chapter 1.16 Ac Adapter and Power Cord  
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Table 1-13. Contura AC Adapter and Power Cord  
===========================================================================  
Description (All Models)  
Spare Part Numbers  
===========================================================================  
1. AC adapter with wallprongs  
2. AC adapter  
147679-001  
147679-002  
3. Power cord (U.S./Canada)  
4. Power cord (U.K.)  
197230-001  
197232-001 *  
197231-001 *  
197233-001 *  
197234-001 *  
5. Power cord (Europe)  
6. Power cord (Japan)  
7. Power cord (Australia)  
---------------------------------------------------------------------------  
* Not shown  
===========================================================================  
Chapter 1.17 Memory and Processor  
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Table 1-14. Contura Memory and Processor  
===========================================================================  
Description (All Models)  
Spare Part Numbers  
===========================================================================  
1. Memory expansion board  
a. 4 MB  
b. 8 MB  
c. 16 MB  
d. 24 MB *  
147654-001  
147656-001  
147658-001  
189261-001  
2. Processor upgrade (Model 400 only)  
486 DX2/50 MHz  
169644-001  
---------------------------------------------------------------------------  
* Not Shown  
===========================================================================  
Chapter 1.18 Miscellaneous Carrying Devices  
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Table 1-15. Miscellaneous Carrying Devices  
===========================================================================  
Description (All Models)  
Spare Part Numbers  
===========================================================================  
1. Briefcase, Ramie  
2. Slipcase  
129930-001  
194162-001  
121423-001 *  
3. Briefcase, SS (soft-sided)  
---------------------------------------------------------------------------  
* Not Shown  
===========================================================================  
Chapter 1.19 Docking Base and Monitor Support Cover  
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Table 1-16. Docking Base and Monitor Support Cover  
===========================================================================  
Description (All Models)  
Spare Part Numbers  
===========================================================================  
1. Docking Base - Ethernet  
2. Docking Base - pass-thru  
147675-001  
147699-001  
169666-001  
3. Docking base miscellaneous  
a. Battery door  
b. Feet  
c. Handle  
d. Screws (Quantity = 2)  
4. Monitor support cover  
147676-001  
169681-001  
5. Monitor support cover foot  
---------------------------------------------------------------------------  
* Not Shown  
===========================================================================  
Chapter 1.20 Miscellaneous CPU Kits  
Table 1-17. Miscellaneous Contura CPU Kits  
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===========================================================================  
Description  
Spare Part Number  
Models 400 & 410  
Spare Part Number  
Models 420 & 430  
===========================================================================  
Handle 147678-001 * 147678-001 *  
---------------------------------------------------------------------------  
Automobile adapter 190551-002 * 190551-002 *  
---------------------------------------------------------------------------  
Memory door assembly  
includes hard drive tray  
---------------------------------------------------------------------------  
Carton, (Quantity = 5) 147862-001 * 147862-001 *  
---------------------------------------------------------------------------  
Carton and buns, (Quantity = 1) 147863-001 * 147863-001 *  
---------------------------------------------------------------------------  
Clutches (left and right) 147858-001 * 147858-001 *  
---------------------------------------------------------------------------  
Anti-skid feet 147859-001 * 147859-001 *  
---------------------------------------------------------------------------  
Plate logo 197251-001 * 189292-001 *  
---------------------------------------------------------------------------  
Box, 420C 189265-001 *  
---------------------------------------------------------------------------  
169713-001 *  
169713-001  
SpeedPaq 192 Data Fax Cellular  
Modem  
187123-001  
---------------------------------------------------------------------------  
PC Card (PCMCIA) 288 Fax/Modem 189661-001 *  
---------------------------------------------------------------------------  
PC Card (PCMCIA) 192 Fax/Modem 188512-001 *  
---------------------------------------------------------------------------  
PC Card (PCMCIA) modem pouch 194133-001 *  
---------------------------------------------------------------------------  
CA, TEL MED 187145-001 *  
---------------------------------------------------------------------------  
Keyboard Warning Label, English 189288-001 *  
---------------------------------------------------------------------------  
Country Kit 140204-001 *  
---------------------------------------------------------------------------  
Trackball removal tool 147779-001 * 147779-001 *  
---------------------------------------------------------------------------  
Miscellaneous  
Includes:  
147874-001 *  
189262-001 *  
Trough  
Battery latch  
Battery tray  
PC Card door  
PC Card ejection levers and pin  
Extension spring (battery eject button,  
display latches)  
Lock plate provision  
Keyboard ground clips  
Left clutch ground clip  
Right clutch ground clip  
Flex ground clip  
Hard Drive Tray  
---------------------------------------------------------------------------  
* Not Shown  
===========================================================================  
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Chapter 1.21 Fastener List  
Table 1-18. Fastener Kit for All Models  
===========================================================================  
Description:  
Spare Part Number  
---------------------------------------------------------------------------  
Screws and Fastners Kit (Quantity = 25 each) 147885-001  
===========================================================================  
===========================================================================  
Description Type  
Where Used  
Part Number Drive Qty  
===========================================================================  
M2.5 x 4.0  
Truss  
Ground tabs on  
display shields  
144864-001  
SL/T8 3 *  
Diskette bracket  
to system board  
3
Hold down system  
board to base and  
chassis  
5 *  
4 **  
Trackball assembly  
to base  
1 *  
2 **  
Battery contracts  
to base/through  
system board  
2
CPU cover to  
keyboard  
7
Clutches to  
display enclosure  
(Models 400 and  
410)  
4 *  
---------------------------------------------------------------------------  
M2.5 x 5.0  
Truss  
CPU base to  
144865-007  
SL/T8 4  
clutches  
Blk  
4
Display bezel to  
display enclosure  
Ground tabs on  
display shields  
(Models 420 and  
430)  
2 **  
Clutches to  
display enclosure  
(Models 420 and  
430)  
4 **  
Display to display  
enclosure  
4 **  
---------------------------------------------------------------------------  
Description Type Where Used Part Number Drive Qty  
---------------------------------------------------------------------------  
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M3.0 x 8.0  
Pan  
Display to display 121187-007  
enclosure  
SL/T8 4 **  
---------------------------------------------------------------------------  
M2.5 x 24.0 Truss  
CPU cover to CPU  
base  
144865-006  
SL/T8 7  
---------------------------------------------------------------------------  
M2.6 x 2.0  
Fillister Diskette drive  
to FDD bracket  
121188-001  
T8  
4
---------------------------------------------------------------------------  
M3.0 x 3.6  
Truss  
Hard drive to HDD  
bracket  
121187-001  
T8  
4
---------------------------------------------------------------------------  
M2.0 x 6.0 Fillister PC Card Header 126790-004 T8 2 **  
---------------------------------------------------------------------------  
M2.0 x 15.5 Fillister PCMCIA rails 126790-010 T8  
---------------------------------------------------------------------------  
2
Spring,  
torsion  
PC Card door  
actuation  
147758-001  
2
---------------------------------------------------------------------------  
Spring,  
extension  
Battery latch  
return spring  
147759-001  
1
2
Display latch  
return spring  
---------------------------------------------------------------------------  
Washer  
Under handle  
bracket  
147923-001  
2
---------------------------------------------------------------------------  
M2.5  
Shoulder  
Handle bracket to  
clutch/through CPU  
base  
147760-001  
T8  
2
---------------------------------------------------------------------------  
M2.5  
Shoulder  
CPU foot to  
clutch/through CPU  
base  
147778-001  
T8  
2
---------------------------------------------------------------------------  
4-40  
Screw  
locks  
Three connectors  
at rear of unit  
106902-001  
3/16  
6
---------------------------------------------------------------------------  
Alignment  
screws  
Shoulder  
Alignment screws  
for docking base  
connector  
169643-001  
T8  
2
---------------------------------------------------------------------------  
* Models 400 and 410  
** Models 420 and 430  
===========================================================================  
Chapter 1.22 Documentation and Software  
Table 1-19. Documentation and Software  
===========================================================================  
Description (All Models)  
===========================================================================  
MAINTENANCE AND SERVICE GUIDE 147861-001  
Spare Part Number  
---------------------------------------------------------------------------  
Online USER'S GUIDE  
English  
147990-001  
Download from Www.Somanuals.com. All Manuals Search And Download.  
German  
French  
Italian  
Spanish  
Netherlands  
Swedish  
147990-041  
147990-051  
147990-061  
147990-071  
147990-331  
147990-101  
---------------------------------------------------------------------------  
Manuals - English  
QUICK SETUP  
147989-001  
BEYOND SETUP  
---------------------------------------------------------------------------  
Manuals - German  
QUICK SETUP  
147989-041  
BEYOND SETUP  
KEYBOARD REFERENCE  
---------------------------------------------------------------------------  
Manuals - French  
QUICK SETUP  
147989-051  
BEYOND SETUP  
KEYBOARD REFERENCE  
---------------------------------------------------------------------------  
Manuals - Italian  
QUICK SETUP  
147989-061  
BEYOND SETUP  
KEYBOARD REFERENCE  
---------------------------------------------------------------------------  
Manuals - Spanish  
QUICK SETUP  
147989-071  
BEYOND SETUP  
KEYBOARD REFERENCE  
---------------------------------------------------------------------------  
Manual - TABWORKS QUICK START GUIDE  
English  
German  
French  
Italian  
Spanish  
Swedish  
Netherlands  
195866-001  
195866-041  
195866-051  
195866-061  
195866-071  
195866-101  
195866-331  
---------------------------------------------------------------------------  
Manual - AMERICA ONLINE 181194-001  
---------------------------------------------------------------------------  
Manual - MS WORKS 196077-001  
---------------------------------------------------------------------------  
Manual - ESSENTIALS OF MS-DOS AND MS-WINDOWS  
English  
German  
French  
Italian  
Spanish  
Swedish  
Portuguese  
Dutch  
144958-001  
144958-041  
144958-051  
144958-061  
144958-071  
144958-101  
144958-131  
144958-331  
---------------------------------------------------------------------------  
Manual - MS-DOS GUIDE, 6.0 and MS Windows  
English  
German  
French  
Italian  
Spanish  
195973-001  
195973-041  
195973-051  
195973-061  
195973-071  
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Danish  
195973-081  
195973-091  
195973-101  
195973-131  
195973-331  
195973-351  
Norwegian  
Swedish  
Portuguese  
Dutch  
Finnish  
---------------------------------------------------------------------------  
Manual - LOTUS ORGANIZER  
English  
German  
French  
Italian  
Spanish  
Danish  
Norwegian  
Swedish  
Dutch  
137885-001  
137885-041  
137885-051  
137885-061  
137885-071  
137885-081  
137885-091  
137885-101  
137885-331  
137885-351  
Finnish  
---------------------------------------------------------------------------  
COMPAQ SERVICE QUICK REFERENCE GUIDE 106854-001  
---------------------------------------------------------------------------  
ROMPaq diskette 181088-001  
===========================================================================  
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Chapter 2. Preparing the Computer for Service  
Introduction  
This chapter provides general service information necessary to prepare the  
computer for service in the following areas:  
o Electrostatic discharge  
o Service preliminaries  
o Battery disposal  
Adherence to the procedures and precautions described in this chapter is  
essential for proper service.  
Chapter 2.1 Electrostatic Discharge  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Static electricity can damage electronic components. Before beginning  
these procedures, make sure you are grounded (discharged of static  
electricity) by briefly touching a grounded, unpainted, metal object or  
surface.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
A sudden discharge of static electricity from a finger or other conductor  
can destroy static-sensitive devices or micro circuitry. Often the spark  
is neither felt nor heard, but damage occurs. An electronic device exposed  
to electrostatic discharge (ESD) may not be affected at all and will work  
perfectly throughout a normal cycle. Or it may function normally for a  
while, then degrade in the internal layers, reducing its life expectancy.  
Networks built into many integrated circuits provide some protection, but  
in many cases, the discharge contains enough power to alter device  
parameters or melt silicon junctions.  
This section details methods of generating, preventing, and grounding  
static electricity.  
Generating Static  
Table 2-1 shows how different activities generate static electricity and  
at different electrostatic voltage levels.  
Table 2-1. Typical Electrostatic Voltages  
===========================================================================  
Relative Humidity  
Event  
10%  
40%  
55%  
===========================================================================  
Walking across carpet  
35,000 V  
12,000 V  
15,000 V  
5,000 V  
7,500 V  
3,000 V  
Walking across vinyl floor  
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Motions of bench worker  
6,000 V  
2,000 V  
11,500 V  
14,500 V  
26,000 V  
21,000 V  
800 V  
400 V  
Removing DIPS from plastic tubes  
Removing DIPS from vinyl trays  
Removing DIPS from Styrofoam  
Removing bubble pack from PCBs  
Packing PCBs in foam-lined box  
700 V  
400 V  
4,000 V  
5,000 V  
20,000 V  
11,000 V  
2,000 V  
3,500 V  
7,000 V  
5,000 V  
---------------------------------------------------------------------------  
NOTE: 700 volts can degrade a product.  
===========================================================================  
Preventing Electrostatic Damage to Equipment  
Many electronic components are sensitive to ESD. Circuitry design and  
structure determine the degree of sensitivity. The following proper  
packaging and grounding precautions are necessary to prevent damage:  
o Protect all electrostatic parts and assemblies with conductive or  
approved containers or packaging.  
o Keep electrostatic sensitive parts in their containers until they arrive  
at static-free stations.  
o Place items on a grounded surface before removing them from their  
container.  
o Always be properly grounded when touching a sensitive component or  
assembly.  
o Place reusable electronic-sensitive parts from assemblies in protective  
packaging or conductive foam.  
Use transporters and conveyors made of anti-static belts and metal roller  
bushings. Mechanized equipment used for moving materials must be wired to  
ground and proper materials selected to avoid static charging. When  
grounding is not possible, use an ionizer to dissipate electric charges.  
Preventing Damage to Drives  
To prevent static damage to hard drives, use the following precautions:  
o Handle drives gently, using static-guarding techniques.  
o Store drives in the original shipping containers.  
o Avoid dropping drives from any height onto any surface.  
o Handle drives on surfaces that have at least one inch of shock proof  
foam.  
o Always place drives PCB assembly side down on the foam.  
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Grounding Methods  
The method for grounding must include a wrist strap or a foot strap at a  
grounded workstation. When seated, wear a wrist strap connected to a  
grounded system. When standing, use footstraps and a grounded floor mat.  
Table 2-2. Static-Shielding Protection Levels  
===========================================================================  
Method  
Voltages  
===========================================================================  
Anti-static Plastic  
Carbon-Loaded Plastic  
Metallized Laminate  
1,500  
7,500  
15,000  
===========================================================================  
Grounding Workstations  
To prevent static damage at the workstation, follow these precautions:  
o Cover the workstation with approved static-dissipative material.  
Provide a wrist strap connected to the work surface and properly  
grounded tools and equipment.  
o Use static-dissipative mats, heel straps, or air ionizers to give added  
protection.  
o Handle electrostatic sensitive components, parts, and assemblies by the  
case or PCB laminate. Handle them only at static-free workstations.  
o Avoid contact with pins, leads, or circuitry.  
o Turn off power and input signals before inserting and removing  
connectors or test equipment.  
o Use fixtures made of static-safe materials when fixtures must directly  
contact dissipative surfaces.  
o Keep work area free of nonconductive materials such as ordinary plastic  
assembly aids and Styrofoam.  
Grounding Equipment  
Use the following equipment to prevent static electricity damage to the  
equipment:  
Wrist Straps are flexible straps with a minimum of 1 megohm +/-10%  
resistance to the ground cords. To provide proper ground, a strap must be  
worn snug against the skin. On grounded mats without banana-plug  
connectors, connect a wrist strap with alligator clips.  
Heelstraps/Toestraps/Bootstraps can be used at standing workstations and  
are compatible with most types of boots and shoes. On conductive floors or  
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dissipative floor mats, use straps on both feet with a minimum of 1 megohm  
of resistance between operator and ground. To be effective, the conductive  
strips must be worn in contact with the skin.  
Field service tools, such as cutters, screwdrivers, vacuums, that are  
conductive.  
Portable field service kit with a static dissipative vinyl pouch that  
folds out of a work mat. Also use a wrist strap and a ground cord for the  
work surface. Ground the cord to the chassis of the equipment undergoing  
test or repair.  
Recommended Materials and Equipment  
Other materials and equipment that are recommended for use in preventing  
static electricity include:  
o Anti-static tape  
o Anti-static smocks, aprons, or sleeve protectors  
o Conductive bins, and other assembly or soldering aids  
o Conductive foam  
o Conductive table-top workstations with ground cord of 1 megohm of  
resistance  
o Static dissipative table or floor mats with hard tie to ground  
o Field service kits  
o Static awareness labels  
o Wrist straps and footwear straps providing 1 megohm +/- 10% resistance  
o Material handling packages  
o Conductive plastic bags  
o Conductive plastic tubes  
o Conductive tote boxes  
o Metal tote boxes  
o Opaque shielding bags  
o Transparent metallized shielding bags  
o Transparent shielding tubes  
Chapter 2.2 Service Preliminaries  
Some of the service preliminaries that should be kept in mind during the  
disassembly and assembly of the computer include:  
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o Tool requirements  
o Screws  
o Cable and connectors  
o Plastics  
Tool Requirements  
o Flat-bladed screwdriver  
o Torx T8 screwdriver (included in 130619-001)  
o Hex socket driver (3/16)  
o 25-Pin printer loopback plug (included in 100767-001)  
o 9-Pin serial loopback plug (included in 100767-001)  
o Trackball removal tool (spare part number 147779-001)  
o Case Utility tool (spare part number 119070-001 and included in  
100767-001))  
o Preloaded application diskettes (Compaq Order Center, 1-800-952-7689)  
Cables and Connectors  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Most cables used throughout the unit are flex cables. These cables must  
be handled with extreme care to avoid damage. Apply only the tension  
required to seat or unseat the cables during insertion or removal from the  
connector. Handle cables by the connector or pull tabs whenever possible.  
In all cases, avoid bending, twisting, or tearing the cables, and ensure  
that cables are placed in such a way that they cannot be caught or snagged  
by parts being removed or replaced.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing these computers, ensure that cables are placed in their  
proper location during the reassembly process. Improper cable placement  
can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Display  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Excess flexing and bending of the shield tabs and fingers can damage the  
shield.  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Keyboard  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Memory Expansion Board  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To prevent damage to the memory expansion board, do not apply pressure to  
the middle of the board. Press only in the area directly over each  
connector.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Plastics  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The plastics can be damaged by applying excessive force during disassembly  
and reassembly. When handling the plastic cases and housing assemblies,  
use care. Do not use screwdrivers or similar tools to pry apart plastics.  
Where necessary, use the Case Utility tool (spare part number 119070-001).  
Proper handling of this tool is illustrated in the disassembly and  
reassembly procedures.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Screws  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The screws used in these products are not interchangeable. If an  
incorrect screw is used during the reassembly process, it could cause  
damage to the unit. Compaq strongly recommends that all screws removed  
during the disassembly process be kept with the part that was removed,  
then returned to their proper locations.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Real-Time Clock Battery  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Do not touch the bottom of the battery during replacement.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Chapter 2.3 Disposal of a Used Battery  
Battery components are considered environmentally harmful. Disposal of a  
Nickel Metal Hydride (NiMH) Battery Pack should comply with country,  
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state, province, or local regulations. Whenever possible, recycle the  
battery components.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Never attempt to open or service a battery pack. Opening a battery pack  
not only damages the pack and makes it unusable, but also exposes  
potentially harmful battery components.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
There is a danger of explosion and risk of personal injury if the battery  
is incorrectly replaced or mistreated. Do not attempt to recharge the  
battery, disassemble it, or immerse it in water or dispose of it in fire.  
Replacement is to be done by Authorized Compaq Service Provider using the  
Compaq spare designated for this product.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Compaq offers its portable product customers in North America an  
environmentally sound method for disposing of depleted Compaq rechargeable  
battery packs used in Compaq laptop and subnotebook personal computers.  
In the interest of our customers and the protection of our environment,  
Compaq has initiated a disposal/recycling program for these battery packs.  
Further, because Compaq is funding all costs associated with the program,  
it is offered at no cost to Compaq laptop and notebook customers.  
IMPORTANT: Toll-Free Number (U. S.) 1-800-524-9859, (Canada)  
1-800-263-5868  
Customers in North America can take advantage of this program immediately.  
To safely dispose of a depleted Compaq rechargeable battery pack, follow  
these steps:  
1. Call the Compaq toll-free telephone number. A recorded message asks you  
to provide your name, mailing address, and information about the  
battery pack. Within approximately two to three weeks, Compaq will send  
a postage-paid "battery mailer" envelope preaddressed to the  
reclamation facility.  
2. Place the Compaq rechargeable battery pack into the battery mailer.  
3. Mail it to the Compaq address shown on the mailer.  
NOTE: Do not return Compaq rechargeable battery packs to authorized Compaq  
service providers (except in the case of service or warranty  
exchanges) nor to any Compaq address other than the address on the  
preaddressed battery mailer envelope.  
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Chapter 3. Removal and Replacement Procedures  
Introduction  
This chapter provides complete removal and replacement procedures for the  
Compaq Contura 400 Family of Personal Computers. Procedures that apply to  
specific models are indicated in parenthesis.  
After completing removal and replacement procedures, run the diagnostics  
program to verify that all components operate properly.  
For replacement procedures, follow the removal procedures in reverse order  
unless otherwise specified.  
Chapter 3.1 Disassembly/Assembly Sequence Chart  
This chart shows the order in which disassembly procedures are provided:  
|-- 3.2 PREPARING THE COMPUTER  
| |-- AC Adapter  
| |-- Battery pack  
|
|-- 3.3 HANDLE BRACKET  
|
|-- 3.4 TILT FEET  
|
|-- 3.5 HARD DRIVE  
|
|-- 3.6 MEMORY EXPANSION BOARD  
|
|-- 3.7 KEYBOARD ASSEMBLY  
| |-- CPU cover  
| |-- Keyboard  
|
|-- 3.8 BATTERY COMPARTMENT COMPONENTS  
| |-- Battery compartment  
| |-- Anti-skid pad  
| |-- Battery release spring and button  
|
|-- 3.9 REAL-TIME CLOCK BATTERY (Models 400 and 410)  
|
|-- 3.10 REAL-TIME CLOCK BATTERY (Models 420 and 430)  
|
|-- 3.11 PROCESSOR UPGRADE OPTION (Model 400 Only)  
|
|-- 3.12 INTEGRATED MECHANICAL TRACKBALL ASSEMBLY  
| |-- (Model 400 and 410)  
|
|-- 3.13 INTEGRATED OPTICAL TRACKBALL ASSEMBLY  
|
|-- 3.14 DISKETTE DRIVE (All Models)  
| |-- Diskette drive  
| |-- Diskette drive bracket  
|
|-- 3.15 THE SYSTEM BOARD (All Models)  
|
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|-- 3.16 PC Card (PCMCIA) ASSEMBLY  
|
|-- 3.17 PC Card (PCMCIA) EJECTION LEVERS AND PIN  
|
|-- 3.18 PC Card (PCMCIA) DOORS AND SPRINGS  
|
|-- 3.19 SYSTEM CHASSIS  
| |-- Trough  
|
|-- 3.20 CPU BASE  
| |-- Battery shield clip  
| |-- Lock provision plate  
| |-- Anti-skid pads  
|
|-- 3.21 DISPLAY ASSEMBLY COMPONENTS (Models 400 and 410)  
| |-- Bezel  
| |-- Latches  
| |-- Inverter board  
|
|-- 3.22 MONOCHROME DISPLAY (Models 400 and 410)  
| |-- LCD Panel with Shield attached  
| |-- Display cable  
| |-- Display ground cable  
|
|-- 3.23 COLOR STN (9.5") DISPLAY (Models 400 and 410)  
| |-- LCD Panel  
| |-- Shield  
| |-- Display cable  
| |-- Display ground cable  
|
|-- 3.24 COLOR TFT (8.4") DISPLAY (Models 400 and 410)  
| |-- LCD Panel  
| |-- Shield  
| |-- Display cable  
| |-- Display ground cable  
|
|-- 3.25 DISPLAY COMPONENTS (Models 420 and 430)  
| |-- Bezel  
| |-- Latches  
| |-- Inverter board  
|
|-- 3.26 COLOR STN (10.4") DISPLAY (Models 420 and 430)  
| |-- LCD Panel  
| |-- Shield  
| |-- Display cable  
| |-- Display ground cable  
|
|-- 3.27 COLOR TFT (10.4") DISPLAY (Models 420 and 430)  
| |-- LCD Panel  
| |-- Shield  
| |-- Display cable  
| |-- Display ground cable  
|
|-- 3.28 DISPLAY ENCLOSURE  
|
|-- 3.29 CLUTCHES AND GROUND CLIPS  
|
|-- 3.30 DOCKING BASE  
| |-- Feet  
| |-- Battery door  
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| |-- Handle  
|
|-- 3.31 MONITOR SUPPORT COVER  
Chapter 3.2 Preparing the Computer  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
There is a danger of explosion and risk of personal injury if the battery  
is incorrectly replaced or mistreated. Do not attempt to recharge the  
battery, disassemble it, or immerse it in water or dispose of it in fire.  
Replacement is to be done by Authorized Compaq Service Provider using the  
Compaq spare designated for this product.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Ensure that the power cord is disconnected from the electrical outlet and  
that the battery pack is removed from the computer before beginning  
replacement procedures. Failure to disconnect power could result in  
serious injury or damage to the equipment.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Static electricity can damage electronic components. Before beginning  
these procedures, make sure you are grounded (discharged of static  
electricity) by briefly touching a grounded, unpainted, metal object or  
surface.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Before beginning the removal and replacement procedures, follow these  
steps to disconnect all power to the computer and remove the diskette or  
PC Card, if installed:  
1. Save all files and exit all applications.  
2. Turn off the computer by pressing the left Ctrl+Alt keys and power  
button.  
3. Disconnect all external equipment.  
4. Disconnect the AC Adapter from the electrical outlet (Figure 3-1).  
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5. Disconnect the AC Adapter power cord from the computer (Figure 3-2).  
6. Eject the diskette (Figure 3-2) and PC Card, if installed.  
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7. Open the battery compartment by lifting up the front of the computer [1]  
and sliding the battery compartment release button to the right [2]. The  
battery compartment opens slightly. Lower the compartment [3]  
(Figure 3-3).  
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8. Remove the battery pack (Figure 3-4).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Metal objects can damage the battery pack and the connectors inside the  
compartment. To prevent damage, do not let metal objects touch any of the  
connectors. Do not place any objects other than the battery pack in the  
battery compartment.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
9. Close the battery compartment.  
Chapter 3.3 Handle Bracket  
This procedure is necessary if replacing the handle bracket or if  
separating the display assembly from the system unit module.  
Removing the Handle Bracket  
To remove the handle bracket, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
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2. Close the computer and turn it top-side down.  
3. Move the tilt foot toward the front of the computer, exposing the  
handle bracket screw on either side of the computer (Figure 3-5).  
4. Using a Torx T8 , remove the screw and washer from each handle bracket.  
These screws are not reusable and must be discarded.  
5. Remove the handle bracket (Figure 3-6).  
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6. To install the handle bracket, reverse the previous steps. Discard the  
old screws and replace with new screws.  
Chapter 3.4 Tilt Feet  
This procedure is necessary if replacing the tilt feet or if separating  
the display assembly from the system unit module.  
Removing the Tilt Feet  
To remove the tilt feet, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Using a Torx T8 , remove the tilt foot screw (Figure 3-7). Screws from  
the tilt feet are not reusable and must be discarded.  
3. Remove the tilt foot (Figure 3-7).  
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4. To install the tilt foot, reverse the previous steps. Discard the old  
screws and replace with new screws.  
Chapter 3.5 Hard Drive  
This section contains removal procedures for the following hard drive  
components:  
o Hard drive compartment cover  
o Hard drive  
o Hard drive bracket  
Removing the Hard Drive Compartment Cover  
To remove the hard drive compartment cover, follow these steps:  
1. Disconnect all power from the computer and remove the battery pack,  
diskette, and PC Card, if installed (Section 3.2).  
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2. Close the computer and turn it top-side down.  
3. Using a Torx T-8 or flat-bladed screwdriver, remove the two screws from  
the hard drive compartment cover (Figure 3-8).  
NOTE: These two screws also secure the CPU base to the keyboard and  
must be removed in order to remove the keyboard and access system  
components.  
4. Use a Case utility tool to remove the hard drive compartment cover  
(Figure 3-9).  
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5. To replace the hard drive compartment cover, reverse the previous steps  
making sure to insert the bracket's tab under the plastic edge.  
Removing the Hard Drive  
1. Remove the hard drive compartment cover. Refer to "Removing the Hard  
Drive Compartment Cover" in this section.  
2. Remove the hard drive by grasping the hard drive bracket and sliding it  
toward the front of the computer [1] (Figure 3-10).  
3. Lift the hard drive and bracket [2] up and out of the computer  
(Figure 3-10).  
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4. To replace the hard drive, reverse the previous steps.  
Removing the Hard Drive Bracket  
1. Remove the hard drive compartment cover. Refer to "Removing the Hard  
Drive Compartment Cover" in this section.  
2. Remove the hard drive and bracket. Refer to "Removing the Hard Drive"  
in this section.  
3. Using a Torx T8 , remove the four screws from the hard drive bracket  
and separate the bracket from the hard drive (Figure 3-11).  
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4. To replace the hard drive bracket, reverse the previous steps.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To prevent damage to the system board connectors, ensure that the hard  
drive is aligned correctly.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
IMPORTANT: The hard drive bracket has four screw holes, one of which is  
elongated and one is small. When replacing the hard drive into  
the hard drive bracket, replace the screw in the small hole  
first [1], then insert the second screw into the elongated  
screw hole [2] (Figure 3-12).  
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Chapter 3.6 Memory Expansion Board  
This section contains removal and replacement procedures for the memory  
compartment cover and the memory expansion board.  
The memory compartment cover and the bottom of the CPU base are embossed  
with arrows and two icons that indicate whether the memory compartment  
cover is unlocked [1] or locked [2].  
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Removing and Replacing the Memory Compartment Cover  
To remove the memory compartment cover, follow these steps:  
1. Disconnect all power from the computer and remove the battery pack,  
diskette, and PC Card, if installed (Section 3.2).  
2. Close the computer and turn it top-side down.  
3. Slide the memory compartment cover toward the rear of the computer and  
lift up (Figure 3-14).  
IMPORTANT: Be sure to maintain the same orientation of the cover to the  
computer when removing and replacing.  
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4. To replace the memory compartment cover, reverse the previous steps.  
Removing the Memory Expansion Board  
To remove the memory expansion board, follow these steps:  
1. Remove the memory compartment cover. Refer to "Removing and Replacing  
the Memory Compartment Cover" in this section.  
2. Gently rock the memory expansion board back and forth, disconnecting  
the board from both connectors (Figure 3-15).  
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Replacing the Memory Expansion Board  
To replace the memory expansion board, follow these steps:  
1. Align the two connectors on the memory expansion board with the  
corresponding connectors on the system board.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To prevent damage to the memory expansion board, do not apply pressure to  
the middle of the board. Press only in the area directly over each  
connector.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
2. Insert the memory expansion board into the compartment and press the  
memory expansion board down. Apply pressure directly over each  
connector. Ensure that both connectors snap into place (Figure 3-16).  
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3. Replace the memory compartment cover. Refer to " Removing and Replacing  
the Memory Compartment Cover" in this section.  
Chapter 3.7 Keyboard Assembly  
This section contains removal and replacement procedures for the following  
the keyboard assembly components:  
o CPU cover  
o Keyboard  
o Top PC Card door and spring  
NOTE: The bottom PC Card door and spring are part of the CPU base.  
Removing the Keyboard Assembly  
To remove the keyboard assembly, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
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battery pack (Section 3.2).  
2. Close the computer and turn it top-side down.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Screws in the computer are not interchangeable. As you remove screws,  
place them with the components you removed. Damage may occur if you  
insert the screws in the wrong place.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
3. Using a Torx T-8 or flat-bladed screwdriver, remove the five screws  
from the bottom of the computer and two screws from the hard drive  
compartment cover (Figure 3-17).  
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4. Use a case utility tool to remove the hard drive compartment cover  
(Figure 3-18).  
5. Carefully, turn the computer top-side up and open the display to its  
fully opened position (135-degree angle) (Figure 3-19).  
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6. Using the case utility tool, lift up the outside rear corners of the  
keyboard assembly to release the keyboard snaps [1], and tilt the  
keyboard assembly toward you to release the keyboard connector [2]  
(Figure 3-20).  
IMPORTANT: When using the case utility tool, use care to keep it out of  
the diskette drive area.  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
be sure to support the computer when opening the display.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
7. Remove the keyboard assembly by lifting it up [1] and off the front of  
the computer [2] (Figure 3-21).  
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8. Position the display to a 90-degree angle (Figure 3-22).  
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Removing the CPU Cover  
To remove the CPU cover for replacement, follow these steps.  
1. Remove the keyboard assembly from the computer. Refer to "Removing the  
Keyboard Assembly" in this section.  
2. Turn the keyboard assembly top-side down.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Note the position of the screws removed from the bottom of the keyboard  
assembly. The remaining screws holes are for the screws that go through  
the keyboard assembly to the CPU base.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
3. Using a Torx T-8 or flat-bladed screwdriver, remove the seven screws on  
the bottom of the keyboard assembly (Figure 3-23).  
IMPORTANT: Some computers will have a light director located in the status  
panel. When removing the CPU cover from the keyboard, the light  
director will come loose. Be sure to replace the light director  
in the status panel when replacing the CPU cover to the keyboard.  
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4. Separate the CPU cover from the keyboard (Figure 3-23).  
5. To replace the CPU cover, reverse the previous steps.  
Removing the Top PC Card (PCMCIA) Door and Spring  
To remove the top PC Card door and spring from the keyboard assembly,  
follow these steps:  
1. Remove the keyboard assembly from the computer. Refer to "Removing the  
Keyboard Assembly" in this section.  
2. Turn the keyboard assembly top-side down.  
3. Remove the PC Card door from the keyboard assembly, unsnap the PC Card  
door [1] from the posts, and remove the door (Figure 3-24).  
4. Remove the spring [2] from the PC Card door (Figure 3-24).  
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Replacing the Top PC Card (PCMCIA) Door and Spring  
To replace the top PC Card Door and Spring to the keyboard assembly,  
follow these steps:  
1. Install the PC Card spring on the door post, ensuring that the bent arm  
of the spring is placed against the rib on the PC Card door  
(Figure 3-25).  
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2. Install the PC Card (PCMCIA) door, ensuring that the spring is placed  
between the post [1] and the rib [2] (Figure 3-26).  
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Replacing the Keyboard Assembly  
If installing a new keyboard assembly, the hook and loop fastener will  
have to be attached to the diskette drive bracket:  
To attach the hook and loop fastener to the diskette drive bracket, follow  
these steps:  
1. Separate the new hook and loop fastener.  
2. Attach the opposite color of the hook and loop fastener to the existing  
hook and loop fastener on the tab on the diskette drive bracket [1]  
(Figure 3-27).  
3. Remove the top layer from the hook and loop fastener to expose the  
adhesive strip prior to replacing the keyboard assembly [2]  
(Figure 3-27).  
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To replace the existing keyboard assembly in the computer, follow these  
steps:  
1. Open the display to its fully opened position of 135-degrees  
(Figure 3-28).  
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2. Angle the front end of the keyboard assembly into place at the front  
edge of the system unit module.  
3. Ensure that the front plastic seams of the keyboard assembly and the  
front of the system unit module are aligned and flush with each other.  
4. Carefully lower the rear of the keyboard assembly to the system unit  
module and press the outside rear corners until the keyboard assembly  
snaps into place.  
5. Verify the alignment of the keyboard assembly to the computer base.  
Check the seams between the front and side edges of the computer base  
and the keyboard assembly. If the seam is uneven, remove the keyboard  
assembly and correctly align the tabs and recesses.  
6. Press firmly in the center of the keyboard assembly below the status  
panel [1] to connect the keyboard connector [2] to the system board [3]  
(Figure 3-29).  
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Chapter 3.8 Battery Compartment Components  
This section contains removal procedures for the following battery  
compartment components:  
o Battery compartment  
o Anti-skid pad  
o Battery release button spring  
o Battery release button  
Removing the Battery Compartment  
To remove the battery compartment components, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Turn the computer top-side down.  
3. Gently squeeze in the sides of the compartment, rocking it back and  
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forth, then lifting it up from the bottom of the base (Figure 3-30).  
4. To replace the battery compartment, reverse the previous steps.  
Attaching the Anti-Skid Pads  
If installing a new battery compartment, two anti-skid pads must be  
attached to the bottom of the battery compartment. To attach the anti-skid  
pads, follow these steps:  
1. Peel off the top layer of one of the anti-skid pads to expose the  
adhesive.  
2. With the adhesive-side down, place the anti-skid pad into the raised  
oval outline on the battery compartment (Figure 3-31).  
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Removing the Battery Release Spring and Button  
To remove the battery release spring and button, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened to a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
2. Remove the keyboard assembly (Section 3.7).  
3. From the battery enclosure, remove the battery release button spring by  
unhooking the spring from the post on the CPU base [1], then releasing  
it from the hook on the battery release button [2] (Figure 3-32).  
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4. Rotate the battery release button counterclockwise, until it bows  
slightly, and lift it up to clear the hook on the computer base  
(Figure 3-33).  
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5. To replace the battery release button and spring, reverse the previous  
steps.  
Chapter 3.9 Real-Time Clock Battery (Models 400 and 410)  
To remove the real-time clock battery, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened to a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
2. Remove the keyboard assembly (Section 3.7).  
3. Remove the real-time clock battery from the system board by inserting a  
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non conductive probe into the battery holder and pushing back on the  
battery to release it (Figure 3-34).  
NOTE: Refer to Chapter 2 "Preparing the Computer for Service" for battery  
disposal procedures.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Do not touch the bottom of the battery during replacement.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. To replace the real-time clock battery, reverse the previous steps.  
Chapter 3.10 Real-Time Clock Battery (Models 420 and 430)  
To remove the real-time clock battery, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
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The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened to a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
2. Remove the keyboard assembly (Section 3.7).  
3. Remove the real-time clock battery from the system board by inserting a  
non conductive probe into the battery holder and pushing back on the  
battery to release it (Figure 3-35).  
NOTE: Refer to Chapter 2 "Preparing the Computer for Service" for battery  
disposal procedures.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Do not touch the bottom of the battery during replacement.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. To replace the real-time clock battery, reverse the previous steps.  
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Chapter 3.11 Processor Upgrade Option (Model 400 Only)  
This section provides installation and replacement procedures for the  
processor upgrade. The Compaq Contura 400 is the only model with the  
DX2/40 MHz Processor that can be upgraded to a DX2/50 MHz processor. Once  
the processor is installed, the upgraded processor overrides control of  
the processor on the system board. You do not have to remove the system  
board processor.  
NOTE: Use only the DX2/50 MHz processor in the upgrade option slot.  
To install the processor upgrade option, do the following:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
2. Remove the keyboard assembly (Section 3.7).  
3. Disconnect the processor board from the two connectors on the system  
board (Figure 3-36).  
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4. To remove the processor upgrade, reverse the previous steps.  
Chapter 3.12 Integrated Mechanical Trackball Assembly  
(Models 400 and 410)  
IMPORTANT: The mechanical trackball assembly is not interchangeable with  
the optical trackball assembly in Models 420 and 430.  
To remove the integrated mechanical trackball assembly, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
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2. Remove the keyboard assembly (Section 3.7).  
3. Using a Torx T-8 or flat-bladed screwdriver, remove the screw from the  
front right-hand corner of the integrated mechanical trackball assembly  
(Figure 3-37).  
4. Disconnect the integrated mechanical trackball assembly from the system  
board by pulling forward on the integrated mechanical trackball  
assembly until it stops.  
5. Tilt up the front of the integrated mechanical trackball assembly and  
lift it up to clear the connectors and the system board (Figure 3-38).  
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6. To replace the integrated mechanical trackball assembly, reverse the  
previous steps.  
Trackball Cleaning Procedures  
1. Turn off the computer by pressing the left Ctrl+Alt keys and the power  
button. Disconnect the AC power and remove the battery pack.  
2. Loosen the trackball retaining ring by placing the trackball tool over  
the retaining ring and turning the tool counterclockwise one quarter  
turn.  
3. Carefully remove the retaining ring. This is a delicate part and  
repetitious handling of this piece may cause it to tear.  
4. Remove the ball from its cage by gently lifting the computer and  
turning it over so that the ball falls into your hand.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Do not soak components, and do not use any solvents other than isopropyl  
(rubbing) alcohol!  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
5. Clean the trackball with isopropyl (rubbing) alcohol only. Dry it with  
a clean, lint-free cloth. DO NOT USE AN ABRASIVE CLEANER.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
If a foam-tipped swap is not available, you can use a cotton swab. But use  
a cotton swap only once and then discard it as it may scratch the  
trackball.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
6. Gently wipe the cage to remove residue from the surface. Clean the ball  
bearings by rubbing with the swab. Do not attempt to remove the  
bearings. Next, gently swab the rollers from side to side until all  
buildup is removed. Rotate rollers to ensure that all surfaces are  
cleaned.  
7. Be sure not to leave any cotton fibers on any part of the trackball  
components. Use tweezers to remove any fibers that may have accumulated  
on or around the cage, rollers, or support post.  
8. Let the unit air dry before reassembling it.  
9. To reassemble, place the computer right side up and place the cleaned  
ball into its cage.  
10. Gently replace the retaining ring by aligning the notches; then use  
the trackball tool to turn it clockwise one quarter turn until it  
locks into place.  
11. Use the trackball to verify that it works properly without skipping or  
sticking.  
Chapter 3.13 Integrated Optical Trackball Assembly (Models 420 and 430)  
IMPORTANT: The optical trackball assembly is not interchangeable with the  
mechanical trackball assembly in Models 400 and 410.  
To remove the integrated optical trackball assembly, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
2. Remove the keyboard assembly (Section 3.7).  
3. Using a Torx T-8 or flat-bladed screwdriver, remove the screw from the  
front right-hand corner and the left rear corner of the trackball  
assembly (Figure 3-39).  
4. Disconnect the integrated optical trackball assembly from the system  
board by pulling upward on the trackball assembly.  
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5. To replace the integrated mechanical trackball assembly, reverse the  
previous steps.  
Trackball Cleaning Procedures  
1. Turn off the computer, disconnect AC power, and remove the battery pack.  
2. Remove the Integrated trackball.  
3. Remove any large particles of debris that have fallen into the  
trackball housing.  
4. Dip a cotton swab in isopropyl alcohol and squeeze off excess liquid.  
5. Carefully wipe inside the cage to remove residue from surfaces. Clean  
the ball bearings by rubbing with the swab. Do not attempt to remove  
the bearings. Do not use alcohol on the sensor window. Instead, gently  
wipe the sensor window with a soft, dry, lint-free cloth until all  
debris is removed. Allow enough time for the parts to air dry before  
reassembling.  
6. Replace the ball and gently secure the retaining ring by rotating it  
clockwise.  
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7. Replace the battery pack and reconnect the AC power.  
Chapter 3.14 Diskette Drive (All Models)  
This section contains removal and replacement procedures for the following  
diskette drive components:  
o Diskette Drive  
o Diskette Drive Bracket  
o Diskette Drive Insulator Strip  
Removing the Diskette Drive  
To remove the diskette drive, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened to a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
2. Remove the keyboard assembly (Section 3.7).  
3. Disconnect the diskette drive cable from the LIF connectors on the  
diskette drive and the system board (Figure 3-41).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Screws in the computer are not interchangeable. As you remove screws,  
place them with the components you removed. Damage may occur if you  
insert the screws in the wrong place.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. Using a Torx T-8 or flat-bladed screwdriver, remove the three diskette  
drive bracket screws that screw into the system board (Figure 3-42).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When removing or replacing the diskette drive, hold it by grasping the  
vertical sides. Pressure to the front drive door area of the diskette  
drive will cause the drive door to pop out from the mounting.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
5. Tilt up the diskette drive bracket, then lift it up and out of the  
system chassis (Figure 3-43).  
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Removing the Diskette Drive from the Diskette Drive Bracket  
1. Remove the diskette drive from the system chassis. Refer to "Removing  
the Diskette Drive" in this section.  
2. Remove the diskette drive from the bracket by removing the four screws  
from both sides of the bracket (Figure 3-44).  
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3. Separate the diskette drive from the bracket (Figure 3-45).  
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4. To replace the diskette drive into the bracket, reverse the previous  
steps.  
Applying the Diskette Drive Hook and Loop Fastener  
If installing a new diskette drive bracket, the hook and loop fastener  
must be attached to the bracket.  
To attach the hook and loop fastener, follow these steps:  
1. Separate the new hook and loop fastener.  
2. Remove the backing from the adhesive on the hook and loop fastener that  
is the opposite color of the hook and loop fastener attached to the  
keyboard assembly (for example, white to black or black to white).  
3. Attach the new hook and loop fastener of the opposite color of the hook  
and loop fastener on the keyboard assembly to the tab on the diskette  
drive bracket (Figure 3-46).  
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Replacing the Diskette Drive  
To replace the diskette drive into the system chassis, follow these steps:  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When removing or replacing the diskette drive, hold it by grasping the  
vertical sides. Pressure to the front drive door area of the diskette  
drive will cause the drive door to pop out from the mounting.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
1. Replace the diskette drive into the diskette drive bracket. Use the  
four screws to secure the diskette drive to the bracket.  
2. Tow in the back end of the diskette drive into the system chassis.  
IMPORTANT: Ensure that the diskette drive door does not catch on the  
outside edge of the system unit module.  
3. Close the diskette drive door slightly while lowering the front of the  
diskette drive into the system chassis (Figure 3-47).  
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4. Reconnect the Diskette Drive Cable and reinstall the three screws.  
Chapter 3.15 The System Board (All Models)  
To remove the system board, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Remove the hard drive (Section 3.5).  
3. Remove the memory expansion board, if installed (Section 3.6).  
4. On the rear of the computer, use a hex socket driver to remove the six  
screw locks (Figure 3-48).  
5. Using a Torx-T8 driver, remove the two alignment screws from the  
docking base connector (Figure 3-48).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
6. Remove the keyboard assembly (Section 3.7).  
7. Remove the processor upgrade, if installed (Section 3.11).  
8. Remove the integrated trackball assembly (Section 3.12 for Models 400  
and 410 and Section 3.13 for Models 420 and 430).  
9. Remove the diskette drive (Section 3.14).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The ZIF connector and its attached cable can be damaged easily. Handle  
only the connector slide when disconnecting the ZIF connector. Never pull  
or twist the cable itself while it is seated in the ZIF connector.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
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10. Disconnect the display cable from the system board by pulling up both  
ends of the ZIF connector slide simultaneously [1], carefully opening  
the slide [2] (Figure 3-49).  
11. Lift the display cable out of the connector slide [3], being careful  
not to pull or twist the cable (Figure 3-49).  
12. Disconnect the display ground cable [1] from the LIF clip above the  
serial port connector (Figure 3-50).  
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13. Remove the three keyboard ground clips from the system board  
(Figure 3-51).  
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14. Remove the left clutch ground clip from the system chassis  
(Figure 3-52).  
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15. For Models 400 and 410, using a Torx T8 or slotted driver, remove the  
five screws from the system board and the two screws from the battery  
contact (Figure 3-53).  
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16. For Models 420 and 430, using a Torx T8 or slotted driver, remove the  
four screws from the system board and the two screws from the battery  
contact (Figure 3-54).  
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17. From the front of the computer, tilt the system board up then lift the  
system board out of the system chassis (Figure 3-55).  
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18. Remove the LIF clip from above the serial port connector between the  
system board and the system chassis (Figure 3-56).  
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19. To replace the system board, reverse the previous steps.  
To replace the System Board, follow these steps:  
IMPORTANT: When installing a new system board, make sure that the  
insulator is placed between the system board and the diskette  
drive. The gasket over the Keyboard connector must be tucked  
under the Chassis.  
IMPORTANT: When replacing the system board, the screws must be replaced as  
follows:  
1. Replace the two alignment screws on the rear of the system unit module  
to align the system board (Figure 3-57).  
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2. Install screws [1] and [2] on the system board before replacing the  
remaining system board and battery contact screws for Models 400 and  
410 (Figure 3-58) and for Models 420 and 430 (Figure 3-59).  
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NOTE: If installing a new system board, ensure that the insulator is  
installed between the system board and diskette drive. The gasket  
over the keyboard connector must be tucked under the Chassis.  
Chapter 3.16 PC Card (PCMCIA) Assembly  
The PC Card assembly consists of the PC Card clip and PC Card rails. To  
remove the PC Card assembly or to remove part of the assembly, follow  
these steps:  
Removing the PC Card Clip  
To remove the PC Card clip, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
2. Remove the keyboard assembly (Section 3.7).  
3. Remove the system board (Section 3.15).  
4. Remove the two screws [1] of the PC Card rails from the bottom of the  
system board (Figure 3-60).  
5. Loosen the Header screws [2] from the bottom of the system board.  
(Figure 3-60).  
6. Remove the clip from the top of the PC Card (PCMCIA) header  
(Figure 3-60).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Do not over torque the clip, or it can be damaged.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
7. Replacement clips and rails on Models 420 and 430 will look different  
but removal and replacement procedures will be the same. To replace the  
PC Card clip, reverse the previous steps, making sure that the PC Card  
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rails are assembled properly into the PC Card Header. The rail goes  
under the edge of the header. Tighten the header screws from the bottom  
of the system board.  
Removing the PC Card (PCMCIA) Rails  
NOTE: The rails for the 400 and 410 models are not interchangeable with  
the rails for the 420 and 430 models.  
To remove the PC Card rails, follow these steps.  
1. Remove the PC Card clips. Refer to "Removing the PC Card Clip" in this  
section.  
2. Slide the rails out of the header (Figure 3-61).  
3. To replace the PC Card rails, reverse the previous steps. The PC Card  
rails go under the edge of the Header.  
Chapter 3.17 PC Card (PCMCIA) Ejection Levers and Pin  
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This section contains removal and replacement procedures for the PC Card  
ejection levers and pin.  
To remove the PC Card ejection levers and pin, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Remove the PC Card ejection lever pin from the system chassis  
(Figure 3-62).  
3. Remove the top PC Card (PCMCIA) ejection lever (Figure 3-63).  
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4. Remove the bottom PC Card ejection lever from the boss on the CPU base  
(Figure 3-64)  
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5. To replace the PC Card ejection levers and pin, reverse the previous  
steps.  
Chapter 3.18 PC Card (PCMCIA) Doors and Springs  
This section contains removal and replacement procedures for the PC Card  
doors and springs. The top PC Card door and spring are located on the  
keyboard assembly and the bottom PC Card door and spring are located on  
the CPU base.  
Top PC Card Door and Spring  
To remove the top PC Card door and spring, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
2. Remove the keyboard assembly (Section 3.7).  
3. Unsnap the PC Card door [1] from the post and remove the door  
(Figure 3-65).  
4. Remove the spring [2] from the PC Card door (Figure 3-65).  
To replace the top PC Card (PCMCIA) door and spring, follow these steps:  
1. Install the PC Card spring on the door rib, making sure the bent arm of  
the spring is placed against the rib on the PC Card door (Figure 3-66).  
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2. Install the PC Card door, making sure the spring is placed between the  
notch [1] and the rib [2] (Figure 3-67).  
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Bottom PC Card (PCMCIA) Door and Spring  
The bottom PC Card door and spring are located on the CPU base. To remove  
the bottom PC Card door and spring, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
2. Remove the keyboard assembly (Section 3.7).  
3. Unsnap the PC Card door from the post and remove the door [1]  
(Figure 3-68).  
4. Remove the spring [2] from the PC Card door (Figure 3-68).  
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To replace the bottom PC Card (PCMCIA) spring and door, follow these steps:  
1. Install the PC Card spring on the door post, making sure the bent arm  
of the spring is placed against the rib on the PC Card door  
(Figure 3-69).  
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2. Install the PC Card door, making sure the spring is placed between the  
notch [1] and the rib [2] (Figure 3-70).  
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Chapter 3.19 System Chassis (All Models)  
To remove the system chassis, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Remove the handle bracket on either side of the computer (Section 3.3).  
3. Remove the tilt feet on either side of the computer (Section 3.4).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. Remove the keyboard assembly (Section 3.7).  
5. Remove the system board (Section 3.15).  
6. Close the display.  
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7. Remove the four clutch screws from the rear of the system unit module  
(Figure 3-71).  
8. Remove the display assembly from the system unit module (Figure 3-72).  
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9. Slide the trough at the rear of the CPU base to the right, then lift up  
to remove (Figure 3-73).  
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10. Remove the system chassis by gently separating it from the CPU base  
and lifting out the system chassis (Figure 3-74).  
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11. To replace the system chassis, reverse the previous steps.  
Chapter 3.20 CPU Base (All Models)  
This section provides removal and replacement procedures for the following  
CPU base components:  
o Battery shield clip  
o Lock provision plate  
o Anti-skid pads  
Removing and Replacing the Battery Shield Clip  
To remove the battery shield clip, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
2. Remove the keyboard assembly (Section 3.7).  
3. Remove the battery shield clip located between the battery enclosure  
and the right interior wall of the CPU base (Figure 3-75).  
4. To replace the battery shield clip, reverse the previous steps.  
Removing and Replacing the Lock Provision Plate  
To remove the lock provision plate, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
2. Remove the keyboard assembly (Section 3.7).  
3. Remove the lock provision plate located between the battery enclosure  
and the right interior wall of the CPU base. The lock provision plate  
looks different for Models 420 and 430 as depicted in the insert  
(Figure 3-76).  
4. To replace the lock provision plate, reverse the previous steps.  
Attaching the Anti-Skid Pads  
If replacing the CPU base, two anti-skid pads for the battery tray and the  
two for the CPU base must be attached to the bottom of the base. To attach  
the anti-skid pads, follow these steps:  
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1. Peel off the top layer of one of the anti-skid pads to expose the  
adhesive.  
2. With the adhesive-side down, place the anti-skid pad into the raised  
oval outline on the CPU base and the battery tray (Figure 3-77).  
Chapter 3.21 Display Assembly Components (Models 400 and 410)  
This section contains removal and replacement procedures for the following  
display assembly components:  
o Bezel  
o Latches  
o Inverter board  
Removing and Replacing the Display Bezel  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Ensure that the power cord is disconnected from the electrical outlet and  
that the battery pack is removed from the computer before beginning  
replacement procedures. Failure to disconnect power could result in  
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serious injury or damage to the equipment.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To remove the display bezel, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
3. Remove the four screws from the display bezel (Figure 3-78).  
4. Separate the display bezel from the display assembly (Figure 3-79).  
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5. To replace the bezel, reverse the previous steps.  
Removing the Display Enclosure Latches and Springs  
To remove the display enclosure latches and springs from either side of  
the display enclosure, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
3. Remove the display bezel. Refer to "Removing and Replacing the Display  
Bezel" in this section.  
4. Hold the bottom of the latch near the spring. Flex the hook end of the  
display latch away from the display enclosure [1] (Figure 3-80).  
5. Pull the display latch from the top, then out of the display enclosure  
[2] (Figure 3-80).  
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6. Remove the display latch spring from the latch (Figure 3-81).  
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Replacing the Display Enclosure Springs and Latches  
To replace the display springs and latches, follow these steps:  
1. Hook the display latch spring on to the display latch [1] and place the  
display latch spring over the post in the display enclosure [2]  
(Figure 3-82).  
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2. Slide the display latch into place on either side of the display  
enclosure (Figure 3-83).  
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Removing the Display Inverter Board  
To remove the inverter board, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
3. Remove the display bezel. Refer to "Removing and Replacing the Display  
Bezel" in this section.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Ensure that the power cord is disconnected from the electrical outlet and  
that the battery pack is removed from the computer before beginning  
replacement procedures. Failure to disconnect power could result in  
serious injury or damage to the equipment.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
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placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. Lift up the inverter board until it clears the three posts on the  
display enclosure (Figure 3-84).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Ensure that the power cord is disconnected from the electrical outlet and  
that the battery pack is removed from the computer before beginning  
replacement procedures. Failure to disconnect power could result in  
serious injury or damage to the equipment.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
5. Unplug the backlight cable [1] from the display inverter board to free  
the inverter board from the display enclosure (Figure 3-85).  
6. Remove the display cable [2] from the inverter board by gently lifting  
up the inverter board and disconnecting it from the display cable and  
the display enclosure (Figure 3-85).  
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Replacing the Display Inverter Board  
To replace the inverter board, follow these steps:  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Ensure that the power cord is disconnected from the electrical outlet and  
that the battery pack is removed from the computer before beginning  
replacement procedures. Failure to disconnect power could result in  
serious injury or damage to the equipment.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
These steps must be followed whenever replacing any component in the  
display assembly because of high susceptibility to electrostatic  
discharge, which will damage the LCD panel.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
1. Insert the inverter board LIF connector into the display cable.  
2. Plug in the backlight cable to the inverter board.  
3. Mount the inverter board into the display enclosure, aligning the  
inverter board with the three mounting posts.  
Chapter 3.22 Monochrome Display (Models 400 and 410)  
IMPORTANT: The Monochrome, CSTN, and CTFT displays have different removal  
and replacement procedures. Be sure to follow the procedures  
for the specific display.  
This sections contains removal and replacement procedures for the  
following monochrome display components:  
o Display panel  
o Shield  
o Display cable  
o Display ground cable  
Removing the Monochrome Panel, the Shield, the Display Cable and the  
Display Ground Cable  
To remove the Monochrome liquid crystal display (LCD) panel, the shield,  
the display cable and the display ground cable follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
3. Remove the keyboard assembly (Section 3.7).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The ZIF connector and its attached cable can be damaged easily. Handle  
only the connector slide when disconnecting the ZIF connector. Never pull  
or twist the cable itself while it is seated in the ZIF connector.  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. Remove the display cable from the system board by pulling up both ends  
of the ZIF connector slide simultaneously [1], carefully opening the  
slide [2] (Figure 3-86).  
5. Lift the display cable out of the connector slide [3], being careful  
not to pull or twist the cable (Figure 3-86).  
6. Disconnect the display ground cable [1] from the LIF clip above the  
serial port connector (Figure 3-87).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To prevent damage to the trough, ensure that the trough does not tilt  
forward into the CPU base when the bezel is removed.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
7. Remove the display bezel (Section 3.21).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Power must be disconnected before handling the Inverter Board  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
8. Remove the inverter board (Section 3.21).  
9. Remove the display cable and backlight cable from the inverter board  
(Section 3.21).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
be sure to support the display assembly when it is fully opened at a  
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135-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
10. Open the display to its fully open position of 135-degrees  
(Figure 3-88).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
11. Remove the nine screws that secure the monochrome LCD panel and the  
shield to the display enclosure (Figure 3-89).  
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12. Carefully remove the Monochrome LCD panel, display cable, and shield  
from the display enclosure (Figure 3-90).  
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13. Lay the Monochrome LCD panel face down on a clean surface.  
14. Grasp the sides of the shield near the backlight cable. Flex the  
shield away from the Monochrome LCD panel. Ensure that the shield tabs  
and finger grips clear the LCD panel (Figure 3-91).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
15. Remove the display cable from the Monochrome LCD panel by pulling up  
both ends of the ZIF connector slide simultaneously [1], carefully  
opening the slide [2] (Figure 3-92)  
16. Lift the display cable out of the connector slide [3], being careful  
not to pull or twist the cable (Figure 3-92).  
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17. Lift the display ground cable out of the display enclosure  
(Figure 3-93).  
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Replacing the Display Ground Cable, the Display Cable, the Shield, and the  
Monochrome Panel  
To replace the display ground cable, the display cable, the shield, and  
the Monochrome LCD panel, follow these steps:  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
1. Position the display ground cable in the display enclosure, aligning  
the cable with the bosses in the display enclosure (Figure 3-94).  
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2. Replace the display cable on the monochrome LCD panel by carefully  
inserting the end of the display cable into the ZIF connector slide on  
the LCD panel (Figure 3-95).  
IMPORTANT: Ensure that the ZIF connector slide is in its fully upward  
position and that it remains so while you are inserting the  
cable into it. Before closing the slide, ensure that the  
cable is fully seated in the ZIF connector.  
3. While holding the end of the display cable inside the ZIF connector  
slide, press down both ends of the slide simultaneously to secure the  
cable in the ZIF connector (Figure 3-95).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Excess flexing and bending of the shield tabs and fingers can damage the  
shield.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. Replace the display shield on the Monochrome LCD panel by slightly  
flexing the display shield tabs and fingers on the Monochrome LCD  
panel. Ensure that the LIF connector end of the display cable is  
exposed on the right side of the Monochrome LCD panel (Figure 3-96).  
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5. Place the shield tabs in the indentations on the right side of the  
Monochrome LCD panel (Figure 3-97).  
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6. Align the Monochrome LCD panel, shield, and cable in the display  
enclosure and replace the screws. Ensure that the ZIF connector end of  
the display cable and the end of the display ground cable are exposed  
at the bottom of the display enclosure (Figure 3-98).  
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7. Connect the display cable and the backlight cable to the inverter board  
(Section 3.21).  
8. Replace the inverter board (Section 3.21).  
9. Replace the bezel (Section 3.21).  
10. Connect the display ground cable [1] to the LIF clip above the serial  
port connector (Figure 3-99).  
11. Carefully insert the end of the display ground cable into the ZIF  
connector slide on the system board (Figure 3-99).  
IMPORTANT: Ensure that the ZIF connector slide is in its fully upward  
position and that it remains so while you are inserting the  
cable into it. Before closing the slide, ensure that the  
cable is fully seated (to the white insertion line) in the  
ZIF connector.  
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12. While holding the end of the display cable inside the ZIF connector  
slide, press down both ends of the slide simultaneously to secure the  
cable in the ZIF connector (Figure 3-100).  
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13. Ensure that the cable has been seated evenly and that the white line  
on the cable is level.  
14. Replace the keyboard assembly (Section 3.7).  
Chapter 3.23 Color STN (9.5 inch) Display (Models 400 and 410)  
IMPORTANT: The Monochrome, CSTN and the CTFT displays have different  
removal and replacement procedures. Be sure to follow the  
procedures for the specific display.  
This sections contains removal and replacement procedures for the  
following CSTN (9.5 inch) display components:  
o Display panel  
o Shield  
o Display cable  
o Display ground cable  
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Removing the CSTN (9.5 inch) Panel, Shield, Display Cable, and the Display  
Ground Cable  
To remove the liquid crystal display CSTN (9.5 inch) panel, the shield, the  
display cable and the display ground cable, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
3. Remove the keyboard assembly (Section 3.7).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The ZIF connector and its attached cable can be damaged easily. Handle  
only the connector slide when disconnecting the ZIF connector. Never pull  
or twist the cable itself while it is seated in the ZIF connector.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. Remove the display cable from the system board by pulling up both ends  
of the ZIF connector slide simultaneously [1], carefully opening the  
slide [2] (Figure 3-101).  
5. Lift the display cable out of the connector slide [3], being careful  
not to pull or twist the cable (Figure 3-101).  
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6. Disconnect the display ground cable [1] from the LIF clip above the  
serial port connector (Figure 3-102).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To prevent damage to the trough, ensure that the trough does not tilt  
forward into the CPU base when the bezel is removed.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
7. Remove the display bezel (Section 3.23).  
8. Remove the inverter board (Section 3.23).  
9. Remove the display cable and backlight cable from the inverter board  
(Section 3.23).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
be sure to support the display assembly when it is fully opened at  
approximately 135-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
10. Open the display to its fully open position of approximately  
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135-degrees (Figure 3-103).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
11. Remove the screws that secure the CSTN (9.5 inch) panel and the shield  
to the display enclosure (Figure 3-104).  
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12. Carefully remove the CSTN (9.5 inch) panel, display cable, and shield  
from the display enclosure (Figure 3-105).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Excess flexing and bending of the shield tabs and fingers can damage the  
shield.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
13. On the right side of display shield, slide the two shield tabs from  
the face of the CSTN (9.5 inch) panel to the back (Figure 3-106).  
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14. Lay the CSTN (9.5 inch) panel face down on a clean surface.  
15. Slide the display shield off the CSTN (9.5 inch) panel (Figure 3-107).  
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16. Disconnect the display cable from the connector on the back of the  
CSTN (9.5 inch) panel (Figure 3-108).  
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17. Lift the display ground cable out of the display enclosure  
(Figure 3-109).  
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Replacing the Display Ground Cable, Display Cable, Shield, and the CSTN  
(9.5 inch) Panel  
To replace the display ground cable, the display cable, the shield, and  
the CSTN (9.5 inch) panel, follow these steps:  
1. Position the display ground cable in the display enclosure, aligning  
the cable with the bosses in the display enclosure (Figure 3-110).  
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2. Connect the display cable to the connector on the back of the CSTN (9.5  
inch) panel (Figure 3-111).  
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3. Slightly lift the tabs on the left side of the display shield and slide  
the shield onto the CSTN (9.5 inch) panel. Ensure that the LIF  
connector end of the display cable is exposed on the right side of the  
CSTN (9.5 inch) panel (Figure 3-112).  
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4. Place the display shield tabs in the indentations on the sides of the  
CSTN (9.5 inch) panel (Figure 3-113).  
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5. Align the CSTN (9.5 inch) panel, display cable, and shield in the  
display enclosure and replace the screws. Ensure that the ZIF  
connector end of the display cable and the end of the display ground  
cable are exposed at the bottom of the display enclosure  
(Figure 3-114).  
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6. Connect the display cable and the backlight cable to the inverter board  
(Section 3.23).  
7. Replace the inverter board (Section 3.23).  
8. Replace the bezel (Section 3.23).  
9. Connect the display ground cable [1] from the LIF clip above the serial  
port connector (Figure 3-115).  
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10. Carefully insert the end of the display cable into the ZIF connector  
slide on the system board.  
IMPORTANT: Ensure that the ZIF connector slide is in its fully upward  
position and that it remains so while you are inserting the  
cable into it. Before closing the slide, ensure that the  
cable is fully seated (to the white insertion line) in the  
ZIF connector.  
11. While holding the end of the display cable inside the ZIF connector  
slide, press down both ends of the slide simultaneously to secure the  
cable in the ZIF connector (Figure 3-116).  
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12. Ensure that the cable has been seated evenly and that the white line  
on the cable is level.  
13. Replace the keyboard assembly (Section 3.7).  
Chapter 3.24 Color TFT (8.4 inch) Display (Models 400 and 410)  
IMPORTANT: The Monochrome, CSTN and the CTFT displays have different  
removal and replacement procedures. Be sure to follow the  
procedures for the specific display.  
This sections contains removal and replacement procedures for the  
following color CTFT (8.4 inch) display components:  
o Display panel  
o Display cable  
o Shield  
o Display ground cable  
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Removing the CTFT (8.4 inch) Liquid Crystal Display Panel  
To remove the CTFT (8.4 inch) panel, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To prevent damage to the trough, ensure that the trough does not tilt  
forward into the CPU base when the bezel is removed.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
3. Remove the display bezel (Section 3.21).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
be sure to support the display assembly when it is fully opened at  
approximately 135-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. Open the display to its fully open position of approximately  
135-degrees (Figure 3-117).  
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5. Remove the inverter board (Section 3.21).  
6. Remove the display cable and backlight cable from the inverter board  
(Section 3.21).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
7. Remove the four screws that secure the CTFT (8.4 inch) panel to the  
display enclosure (Figure 3-118).  
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8. Carefully rotate the CTFT (8.4 inch) panel down and out of the display  
enclosure, laying the CTFT (8.4 inch) panel gently on the keyboard  
assembly (Figure 3-119).  
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9. Remove the display cable from the connector on the back of the panel  
by pulling the tabs at the back of the connector (Figure 3-120).  
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Replacing the CTFT (8.4 inch) Display Panel  
To replace the CTFT (8.4 inch) panel, follow these steps:  
1. Connect the display cable to the connector on the back of the CTFT (8.4  
inch) panel (Figure 3-121).  
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2. Position the CTFT (8.4 inch) panel into the display enclosure, ensuring  
that the ZIF connector end of the display cable is exposed on the right  
side of the CTFT (8.4 inch) panel (Figure 3-122).  
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3. Secure the CTFT (8.4 inch) panel with four screws to the display  
enclosure.  
Removing the CTFT (8.4 inch) Display Cable  
To remove the CTFT (8.4 inch) display cable, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
3. Remove the keyboard assembly (Section 3.7).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
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The ZIF connector and its attached cable can be damaged easily. Handle  
only the connector slide when disconnecting the ZIF connector. Never pull  
or twist the cable itself while it is seated in the ZIF connector.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. Remove the display cable from the system board by pulling up both ends  
of the ZIF connector slide simultaneously [1], carefully opening the  
slide [2] (Figure 3-123).  
5. Lift the display cable out of the connector slide [3], being careful  
not to pull or twist the cable (Figure 3-123).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To prevent damage to the trough, ensure that the trough does not tilt  
forward into the CPU base when the bezel is removed.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
6. Remove the display bezel (Section 3.21).  
7. Remove the inverter board (Section 3.21).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
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The ZIF connector and its attached cable can be damaged easily. Handle  
only the connector slide when disconnecting the ZIF connector. Never pull  
or twist the cable itself while it is seated in the ZIF connector.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
8. Remove the display cable and backlight cable from the inverter board  
(Section 3.21).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
9. Remove the CTFT (8.4 inch) display panel. Refer to "Removing the CTFT  
(8.4 inch) Display Panel" in this section.  
10. Disconnect the CTFT (8.4 inch) display cable. Refer to "Removing the  
CTFT (8.4 inch) Panel" in this section.  
Replacing the CTFT Display Cable  
To replace the CTFT (8.4 inch) display cable, follow these steps:  
1. Connect the display cable to the CTFT (8.4 inch) panel. Refer to  
"Replacing the CTFT (8.4 inch) Display Panel" in this section.  
2. Connect the display cable and the backlight cable to the inverter board  
(Section 3.21).  
3. Replace the inverter board (Section 3.21).  
4. Replace the bezel (Section 3.21).  
5. Carefully insert the end of the display cable into the ZIF connector  
slide on the system board (Figure 3-124).  
IMPORTANT: Ensure that the ZIF connector slide is in its fully upward  
position and that it remains so while you are inserting the  
cable into it. Before closing the slide, ensure that the cable  
is fully seated (to the white insertion line) in the ZIF  
connector.  
6. While holding the end of the display cable inside the ZIF connector  
slide, press down both ends of the slide simultaneously to secure the  
cable in the ZIF connector (Figure 3-124).  
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7. Ensure that the cable has been seated evenly and that the white line on  
the cable is level.  
8. Replace the keyboard assembly (Section 3.7).  
Removing and Replacing the CTFT (8.4 inch) Display Shield  
To remove the CTFT (8.4 inch) display shield, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To prevent damage to the trough, ensure that the trough does not tilt  
forward into the CPU base when the bezel is removed.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
3. Remove the display bezel (Section 3.21).  
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4. Remove the inverter board (Section 3.21).  
5. Remove the display cable and backlight cable from the inverter board  
(Section 3.21).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
6. Remove the CTFT (8.4 inch) panel from the display enclosure. Refer to  
"Removing the CTFT (8.4 inch) Display Panel" in this section.  
7. Remove the remaining five screws from the display shield (Figure 3-125).  
8. Lift the display shield up and away from the display enclosure  
(Figure 3-126).  
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9. To replace the display shield, reverse the previous steps.  
Removing and Replacing the Display Ground Cable  
To remove the display ground cable, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To prevent damage to the trough, ensure that the trough does not tilt  
forward into the CPU base when the bezel is removed.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
3. Remove the display bezel (Section 3.21).  
4. Remove the inverter board (Section 3.21).  
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5. Remove the display cable and backlight cable from the inverter board  
(Section 3.21).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
6. Remove the CTFT (8.4 inch) panel from the display enclosure. Refer to  
"Removing the CTFT (8.4 inch) Display Panel" in this section.  
7. Remove the display cable. Refer to "Removing the CTFT (8.4 inch)  
Display Cable" in this section.  
8. Remove the display shield. Refer to "Removing and Replacing the CTFT  
(8.4 inch) Display Shield" in this section.  
9. Disconnect the display ground cable [1] from the LIF clip above the  
serial port connector on the system unit module (Figure 3-127).  
10. Lift the display ground cable out of the display enclosure (Figure 3-128).  
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11. To replace the display ground cable, reverse the previous steps.  
Chapter 3.25 Display Components (Models 420 and 430)  
This section contains removal and replacement procedures for the following  
display assembly components:  
o Bezel  
o Latches  
o Inverter board  
Removing and Replacing the Display Bezel  
To remove the display bezel, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
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2. Open the computer.  
3. Remove the four screws from the display bezel (Figure 3-129).  
4. Separate the display bezel from the display assembly (Figure 3-130).  
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5. To replace the bezel, reverse the previous steps.  
Removing the Display Enclosure Latches and Springs  
To remove the display enclosure latches and springs from either side of  
the display enclosure, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
3. Remove the display bezel. Refer to "Removing and Replacing the Display  
Bezel" in this section.  
4. Hold the bottom of the latch near the spring. Flex the hook end of the  
display latch away from the display enclosure [1] (Figure 3-131).  
5. Pull the display latch from the top, then out of the display enclosure  
[2] (Figure 3-131).  
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6. Remove the display latch spring from the latch (Figure 3-132).  
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Replacing the Display Enclosure Springs and Latches  
To replace the display springs and latches, follow these steps:  
1. Hook the display latch spring on to the display latch [1] and place the  
display latch spring over the post in the display enclosure [2]  
(Figure 3-133).  
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2. Slide the display latch into place on either side of the display  
enclosure (Figure 3-134).  
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Removing the Display Inverter Board for the CSTN (10.4 inch) Display  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Ensure that the power cord is disconnected from the electrical outlet and  
that the battery pack is removed from the computer before beginning  
replacement procedures. Failure to disconnect power could result in  
serious injury or damage to the equipment.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To remove the inverter board for the CSTN (10.4 inch) Display, follow these  
steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
3. Remove the display bezel. Refer to "Removing and Replacing the Display  
Bezel" in this section.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
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location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. Lift up the inverter board until it clears the three posts on the  
display enclosure (Figure 3-135).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Ensure that the power cord is disconnected from the electrical outlet and  
that the battery pack is removed from the computer before beginning  
replacement procedures. Failure to disconnect power could result in  
serious injury or damage to the equipment.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
5. Unplug the backlight cable [1] from the display inverter board to free  
the inverter board from the display enclosure (Figure 3-136).  
6. Remove the display cable [2] from the inverter board by gently lifting  
up the inverter board and disconnecting it from the display cable and  
the display enclosure (Figure 3-136).  
7. Remove the screw in the lower right corner of the display to release  
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the ground wire which is attached to the inverter board.  
Removing the Display Inverter Board for the CTFT (10.4 inch) Display  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Ensure that the power cord is disconnected from the electrical outlet and  
that the battery pack is removed from the computer before beginning  
replacement procedures. Failure to disconnect power could result in  
serious injury or damage to the equipment.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
NOTE: The CTFT (10.4 inch) display is different than all other displays.  
The inverter board fits partially behind the display. Loosen the  
screws (as indicated by the circles in Figure 3-137) on the display  
to slide the inverter out from behind the display.  
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To remove the inverter board for the CTFT (10.4 inch) Display, follow  
these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
3. Remove the display bezel. Refer to "Removing and Replacing the Display  
Bezel" in this section.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. Lift up the inverter board until it clears the three posts on the  
display enclosure (Figure 3-138).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Ensure that the power cord is disconnected from the electrical outlet and  
that the battery pack is removed from the computer before beginning  
replacement procedures. Failure to disconnect power could result in  
serious injury or damage to the equipment.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
5. Unplug the backlight cable [1] from the display inverter board to free  
the inverter board from the display enclosure (Figure 3-139).  
6. Remove the display cable [2] from the inverter board by gently lifting  
up the inverter board and disconnecting it from the display cable and  
the display enclosure (Figure 3-139).  
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Replacing the Display Inverter Board  
To replace the inverter board, follow these steps:  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Ensure that the power cord is disconnected from the electrical outlet and  
that the battery pack is removed from the computer before beginning  
replacement procedures. Failure to disconnect power could result in  
serious injury or damage to the equipment.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
These steps must be followed whenever replacing any component in the  
display assembly because of high susceptibility to electrostatic  
discharge, which will damage the LCD panel.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
1. Insert the inverter board LIF connector into the display cable.  
2. Plug in the backlight cable to the inverter board.  
3. Mount the inverter board into the display enclosure, aligning the  
inverter board with the three mounting posts.  
4. For the CSTN (10.4 inch) models, reconnect the inverter ground wire the  
lower right corner of the display.  
5. For the CTFT (10.4 inch) models, the inverter board slides partially  
underneath the CTFT Display.  
Chapter 3.2 Color STN (10.4 inch) Display (Models 420 and 430)  
IMPORTANT: The Monochrome, CSTN and CTFT displays have different removal  
and replacement procedures. Be sure to follow the procedures  
for the specific display.  
This section contains removal and replacement procedures for the  
following CSTN (10.4 inch) display components:  
o Display panel  
o Shield  
o Display cable  
o Display ground cable  
Removing the CSTN (10.4 inch) Panel, Shield, Display Cable, and the  
Display Ground Cable  
To remove the liquid crystal display CSTN (10.4 inch) panel, shield,  
display cable and the display ground cable, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
3. Remove the keyboard assembly (Section 3.7).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The ZIF connector and its attached cable can be damaged easily. Handle  
only the connector slide when disconnecting the ZIF connector. Never pull  
or twist the cable itself while it is seated in the ZIF connector.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. Remove the display cable from the system board by pulling up both ends  
of the ZIF connector slide simultaneously [1], carefully opening the  
slide [2] (Figure 3-140).  
5. Lift the display cable out of the connector slide [3], being careful  
not to pull or twist the cable (Figure 3-140).  
6. Disconnect the display ground cable [1] from the LIF clip above the  
serial port connector (Figure 3-141).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To prevent damage to the trough, ensure that the trough does not tilt  
forward into the CPU base when the bezel is removed.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
7. Remove the display bezel (Section 3.25).  
8. Remove the inverter board (Section 3.25).  
9. Remove the display cable and backlight cable from the inverter board  
(Section 3.25).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
be sure to support the display assembly when it is fully opened at  
approximately 135-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
10. Open the display to its fully open position of approximately  
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135-degrees (Figure 3-142).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
11. Remove the screws that secure the CSTN (10.4 inch) panel and the shield  
to the display enclosure (Figure 3-143).  
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12. Carefully remove the CSTN (10.4 inch) panel, display cable, and shield  
from the display enclosure (Figure 3-144).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Excess flexing and bending of the shield tabs and fingers can damage the  
shield.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
13. On the right side of display shield, slide the two shield tabs from  
the face of the CSTN (10.4 inch) panel to the back (Figure 3-145).  
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14. Lay the CSTN (10.4 inch) panel face down on a clean surface.  
15. Slide the display shield off the CSTN panel (Figure 3-146).  
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16. Only Sharp panels require the XOVER Board. Remove the ground wire  
connecting the XOVER Board with the CSTN (10.4 inch) Panel  
(Figure 3-147).  
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17. Disconnect the display cable from the connector on the back of the  
CSTN (10.4 inch) panel (Figure 3-148).  
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17. Lift the display ground cable out of the display enclosure  
(Figure 3-149).  
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Replacing the Display Ground Cable, Display Cable, Shield, and the CSTN  
(10.4 inch) Panel  
To replace the display ground cable, display cable, shield, and the CSTN  
(10.4 inch) panel, follow these steps:  
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1. Position the display ground cable in the display enclosure, aligning  
the cable with the bosses in the display enclosure (Figure 3-151).  
2. If the CSTN panel is manufactured by Sharp complete this step. If not,  
continue to step 4. Connect the display cable to the XOVER Board. Then  
connect the XOVER Board to the connector on the back of the CSTN (10.4  
in) panel. Attach the ground wire of the XOVER Board to the display  
panel as indicated in (Figure 3-151).  
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3. If the CSTN panel is manufactured by Sharp complete this step. If not,  
continue to the next step. Peel off the adhesive from the back of the  
rubber pad found in the spare kit. Place this pad on the display  
enclosure indicated by the embossed area (Figure 3-152).  
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4. Slightly lift the tabs on the left side of the display shield and slide  
the shield onto the CSTN (10.4 inch) panel. Ensure that the LIF  
connector end of the display cable is exposed on the right side of the  
CSTN (10.4 inch) panel (Figure 3-153).  
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5. Place the display shield tabs in the indentations on the sides of the  
CSTN (10.4 in) panel (Figure 3-154).  
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6. Align the CSTN (10.4 inch) panel, display cable, and shield in the  
display enclosure and replace the screws. Ensure that the ZIF connector  
end of the display cable and the end of the display ground cable are  
exposed at the bottom of the display enclosure (Figure 3-155).  
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7. Connect the display cable and the backlight cable to the inverter  
board (Section 3.25).  
8. Replace the inverter board (Section 3.25).  
9. Replace the bezel (Section 3.25).  
10. Connect the display ground cable [1] from the LIF clip above the serial  
port connector (Figure 3-156).  
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11. Carefully insert the end of the display ground cable into the ZIF  
connector slide on the system board.  
IMPORTANT: Ensure that the ZIF connector slide is in its fully upward  
position and that it remains so while you are inserting the  
cable into it. Before closing the slide, ensure that the  
cable is fully seated (to the white insertion line) in the  
ZIF connector.  
12. While holding the end of the display cable inside the ZIF connector  
slide, press down both ends of the slide simultaneously to secure the  
cable in the ZIF connector (Figure 3-157).  
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13. Ensure that the cable has been seated evenly and that the white line  
on the cable is level.  
14. Replace the keyboard assembly (Section 3.7).  
Chapter 3.27 Color TFT (10.4 inch) Display (Models 420 and 430)  
IMPORTANT: The Monochrome, CSTN and the CTFT displays have different  
removal and replacement procedures. Be sure to follow the  
procedures for the specific display.  
This sections contains removal and replacement procedures for the  
following CTFT (10.4 inch) display components:  
o Display panel  
o Display cable  
o Shield  
o Display ground cable  
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Removing the CTFT Display Panel  
To remove the CTFT (10.4 inch) panel, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To prevent damage to the trough, ensure that the trough does not tilt  
forward into the CPU base when the bezel is removed.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
3. Remove the display bezel (Section 3.25).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
be sure to support the display assembly when it is fully opened at  
approximately 135-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. Open the display to its fully open position of approximately  
135-degrees (Figure 3-158).  
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NOTE: The CTFT (10.4 inch) display is different than all other displays.  
The inverter board fits partially behind the display. Loosen the  
screws on the display to slide the inverter out from behind the  
display.  
5. Remove the inverter board (Section 3.25).  
6. Remove the display cable and backlight cable from the inverter board  
(Section 3.25).  
7. Remove the four screws that secure the CTFT (10.4 inch) panel to the  
display enclosure (Figure 3-159).  
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8. Carefully rotate the CTFT (10.4 inch) panel down and out of the display  
enclosure, laying the CTFT (10.4 inch) panel gently on the keyboard  
assembly (Figure 3-160).  
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9. Remove the display cable from the connector on the back of the panel  
(Figure 3-161).  
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10. The CTFT Display Cable is disconnected by pulling upward on the tabs  
on the back of the Connector.  
Replacing the CTFT (10.4 inch) Display Panel  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To replace the CTFT (10.4 inch) panel, follow these steps:  
1. Connect the display cable to the connector on the back of the CTFT  
(10.4 inch) panel (Figure 3-162).  
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2. Position the CTFT (10.4 inch) panel into the display enclosure, ensuring  
that the ZIF connector end of the display cable is exposed on the right  
side of the CTFT (10.4 inch) panel (Figure 3-163).  
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3. Secure the CTFT (10.4 inch) panel with four screws to the display  
enclosure.  
Removing the CTFT (10.4 inch) Display Cable  
To remove the CTFT (10.4 inch) display cable, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
3. Remove the keyboard assembly (Section 3.7).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
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The ZIF connector and its attached cable can be damaged easily. Handle  
only the connector slide when disconnecting the ZIF connector. Never pull  
or twist the cable itself while it is seated in the ZIF connector.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To prevent damage to the trough, ensure that the trough does not tilt  
forward into the CPU base when the bezel is removed  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. Remove the display cable from the system board by pulling up both ends  
of the ZIF connector slide simultaneously [1], carefully opening the  
slide [2] (Figure 3-164).  
5. Lift the display cable out of the connector slide [3], being careful  
not to pull or twist the cable (Figure 3-164).  
6. Remove the display bezel (Section 3.25).  
7. Remove the inverter board (Section 3.25).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
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The ZIF connector and its attached cable can be damaged easily. Handle  
only the connector slide when disconnecting the ZIF connector. Never pull  
or twist the cable itself while it is seated in the ZIF connector.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
8. Remove the display cable and backlight cable from the inverter board  
(Section 3.25).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
9. Remove the CTFT (10.4 inch) display panel. Refer to "Removing the CTFT  
(10.4 inch) Display Panel" in this section.  
10. Disconnect the CTFT (10.4 inch) display cable. Refer to "Removing the  
CTFT (10.4 inch) Panel" in this section.  
Replacing the CTFT Display Cable  
To replace the CTFT (10.4 inch) display cable, follow these steps:  
1. Connect the CTFT (10.4 inch) display cable to the (10.4 inch) panel.  
Refer to "Replacing the CTFT (10.4 inch) Display Panel" in this section.  
2. Connect the display cable and the backlight cable to the inverter board  
(Section 3.25).  
3. Replace the inverter board (Section 3.25).  
4. Replace the bezel (Section 3.25).  
5. Carefully insert the end of the display cable into the ZIF connector  
slide on the system board.  
IMPORTANT: Ensure that the ZIF connector slide is in its fully upward  
position and that it remains so while you are inserting the  
cable into it. Before closing the slide, ensure that the  
cable is fully seated (to the white insertion line) in the  
ZIF connector.  
6. While holding the end of the display cable inside the ZIF connector  
slide, press down both ends of the slide simultaneously to secure the  
cable in the ZIF connector (Figure 3-165).  
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7. Ensure that the cable has been seated evenly and that the white line on  
the cable is level.  
8. Replace the keyboard assembly (Section 3.7).  
Removing and Replacing the CTFT (10.4 inch) Display Shield  
To remove the CTFT (10.4 inch) display shield, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To prevent damage to the trough, ensure that the trough does not tilt  
forward into the CPU base when the bezel is removed.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
3. Remove the display bezel (Section 3.25).  
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4. Remove the inverter board (Section 3.25).  
5. Remove the display cable and backlight cable from the inverter board  
(Section 3.25).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
6. Remove the CTFT (10.4 inch) panel from the display enclosure. Refer to  
"Removing the CTFT (10.4 inch) Display Panel" in this section.  
7. Remove the remaining five screws from the display shield (Figure 3-166).  
8. Lift the display shield up and away from the display enclosure  
(Figure 3-167).  
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9. To replace the display shield, reverse the previous steps.  
Removing and Replacing the Display Ground Cable  
To remove the display ground cable, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Open the computer.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To prevent damage to the trough, ensure that the trough does not tilt  
forward into the CPU base when the bezel is removed.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
3. Remove the display bezel (Section 3.25).  
4. Remove the inverter board (Section 3.25).  
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5. Remove the display cable and backlight cable from the inverter board  
(Section 3.25).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
6. Remove the CTFT (10.4 inch) panel from the display enclosure. Refer to  
"Removing the CTFT (10.4 inch) Display Panel" in this section.  
7. Remove the display cable. Refer to "Removing the CTFT (10.4 inch)  
Display Cable" in this section.  
8. Remove the display shield. Refer to "Removing and Replacing the CTFT  
(10.4 inch) Display Shield" in this section.  
9. Disconnect the display ground cable [1] from the LIF clip above the  
serial port connector on the system unit module (Figure 3-168).  
10. Lift the display ground cable out of the display enclosure (Figure 3-169).  
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11. To replace the display ground cable, reverse the previous steps.  
Chapter 3.28 Display Enclosure  
This section provides replacement procedures for the display enclosure.  
Replacing the Display Enclosure  
To replace the display enclosure, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Remove the handle brackets (Section 3.3).  
3. Remove the tilt feet (Section 3.4).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
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the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. Remove the keyboard assembly (Section 3.7).  
5. Remove the right clutch ground clip located between the clutch and the  
CPU base.  
NOTE: The right clutch clip for Models 420 and 430 is different than  
for Models 400 and 410, and is illustrated in the circular insert  
(Figure 3-170).  
6. Life up both ends of the ZIF connector slide simultaneously [1],  
carefully opening the slide [2] (Figure 3-171).  
7. Lift the display cable out of the connector slide [3], being careful  
not to pull or twist the cable (Figure 3-171).  
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8. Disconnect the display ground cable [1] from the LIF clip  
(Figure 3-172).  
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To prevent damage to the display assembly while the keyboard assembly is  
removed from the system unit module, use care when closing the display.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
9. Gently lower the display.  
10. Using a Torx T8 or slotted driver, remove the four clutch screws from  
the rear panel of the computer (Figure 3-173).  
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11. Lift the display assembly off the system unit module (Figure 3-174).  
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12. Position the display assembly top-side up.  
13. Remove the display bezel (Section 3.25).  
14. Remove the display latches and springs (Section 3.25).  
15. Remove the inverter board (Section 3.21).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The ZIF connector and its attached cable can be damaged easily. Handle  
only the connector slide when disconnecting the ZIF connector. Never pull  
or twist the cable itself while it is seated in the ZIF connector.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
16. Remove the display cable and backlight cable from the inverter board  
(Section 3.21).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
When servicing the computer, ensure that cables are placed in their proper  
location to avoid pinching during the reassembly process. Improper cable  
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placement can cause severe damage to the unit.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
17. Remove the LCD panel, the display cable, the shield, and the display  
ground cable from the display enclosure as follows:  
- If removing a Monochrome panel and shield, refer to Section 3.22.  
- If removing a CSTN (9.5 in) panel and shield, refer to Section 3.23.  
- If removing a CTFT (8.4 in) panel and shield, refer to Section 3.24.  
- If removing a CSTN (10.4 in) panel and shield, refer to Section  
3.26.  
- If removing a CTFT (10.4 in) panel and shield, refer to Section 3.27.  
18. Remove the display clutches from the display enclosure (Figure 3-175).  
19. Place the new display enclosure top-side up.  
20. Replace the display clutches on either side of the display enclosure  
(Figure 3-176).  
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21. Replace the display ground cable, the LCD panel, the shield, and the  
display cable into the display enclosure as follows:  
- If replacing a Monochrome panel and shield, refer to Section 3.22.  
- If removing a CSTN (9.5 in) panel and shield, refer to Section 3.23.  
- If removing a CTFT (8.4 in) panel and shield, refer to Section 3.24.  
- If removing a CSTN (10.4 in) panel and shield, refer to Section  
3.26.  
- If removing a CTFT (10.4 in) panel and shield, refer to Section 3.27.  
22. Connect the display cable and backlight cable to the inverter board  
(Section 3.25).  
23. Replace the inverter board (Section 3.25).  
24. Replace the display latches and springs (Section 3.25).  
25. Replace the bezel (Section 3.25).  
26. Position the display clutches at a 90-degree angle (Figure 3-177).  
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27. Align the clutches with the system unit module, ensuring that the  
display ground cable and the display cable are positioned on top of  
the system unit module (Figure 3-178).  
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28. Replace the four rear clutch screws (Figure 3-179).  
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29. Open the display to a 90-degree angle (Figure 3-180).  
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30. Connect the display ground cable [1] to the LIF clip above the serial  
port connector between the system board and the system chassis  
(Figure 3-181).  
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31. Carefully insert the end of the cable into the ZIF connector slide on  
the system unit.  
IMPORTANT: Ensure that the ZIF connector slide is in its fully upward  
position and that it remains so while you are inserting the  
cable into it. Before closing the slide, ensure that the  
cable is fully seated (to the white insertion line) in the  
ZIF connector.  
32. While holding the end of the display cable inside the ZIF connector  
slide, press down both ends of the slide simultaneously to secure the  
cable in the ZIF connector (Figure 3-182).  
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33. Ensure that the cable has been seated evenly and that the white line  
on the cable is level.  
34. Replace the right clutch ground clip located between the clutch and  
the CPU base. The right clutch clip for Models 420 and 430 is  
different and is illustrated in the insert Figure 3-183).  
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35. Replace the keyboard assembly (Section 3.7).  
36. Replace the tilt feet (Section 3.4).  
37. Replace the handle bracket (Section 3.3).  
Chapter 3.29 Clutches and Ground Clips  
This section contains removal and replacement procedures for the clutch  
ground clips located between the system chassis and CPU base, and for the  
clutches that join the system unit module and the display enclosure.  
Removing and Replacing the Clutch Ground Clips  
To remove the left and right clutch ground clips, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Remove the keyboard assembly (Section 3.7).  
3. Remove the left clutch ground clip from the system chassis  
(Figure 3-184).  
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4. Remove the right clutch ground clip located between the clutch and the  
CPU base. The right clutch clip for Models 420 and 430 is different and  
is illustrated in the insert (Figure 3-185).  
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5. To replace the clutch ground clips, reverse the previous steps.  
Removing and Replacing the Clutches  
To remove the clutches, follow these steps:  
1. Disconnect all power from the computer and remove the AC Adapter and  
battery pack (Section 3.2).  
2. Remove the handle brackets from each side of the computer  
(Section 3.3).  
3. Remove the tilt feet from each side of the computer (Section 3.4).  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
The computer becomes top heavy when the keyboard assembly is removed and  
the display is opened. To prevent damage to the display and the computer,  
ensure that the display assembly is opened at a 90-degree angle.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
4. Remove the keyboard assembly (Section 3.7).  
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5. Remove the left and right clutch ground clips (see "Removing and  
Replacing Clutch Ground Clips" in this section).  
6. Pull up both ends of the ZIF connector slide simultaneously [1],  
carefully opening the slide [2] (Figure 3-186).  
7. Lift the display cable out of the connector slide [3], being careful  
not to pull or twist the cable (Figure 3-186).  
8. Remove the display ground cable [1] away from the LIF clip  
(Figure 3-187).  
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9. Using a Torx T8 or slotted driver, remove the four clutch screws on the  
rear of the system unit module (Figure 3-188).  
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10. Lift the display assembly off the system unit module (Figure 3-189).  
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11. Place the display assembly top-side up.  
12. Remove the display bezel (Section 3.21).  
13. Remove the screws from the clutches on either side of the display  
enclosure.  
14. On either side of the display enclosure, slide the clutches from  
underneath the display shield tabs (Figure 3-190).  
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15. Slide the clutches out of the display enclosure.  
16. To replace the clutches, reverse the previous steps.  
IMPORTANT: When replacing the display clutch screws, ensure proper  
alignment of the display clutches on either side of the display  
enclosure with the shield (Figure 3-191).  
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Chapter 3.30 Docking Base  
This section contains removal procedures for the following docking base  
components:  
o Battery Door  
o Feet  
o Handle  
Removing the Battery Door  
To remove the battery door, follow these steps:  
1. Open the battery door until it is perpendicular to the docking base  
(Figure 3-192).  
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2. Hold the door upright, applying pressure to the door at the base of the  
front hinge [1]. This creates a pivot point [2] to rotate the door out  
of the base (Figure 3-193).  
3. Flex the front end of the door until the retaining pin [3] clears the  
hinge slot on the docking base (Figure 3-193).  
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4. Remove the battery door from the docking base (Figure 3-194).  
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5. To replace the battery door, reverse the previous steps.  
Replacing the Docking Base Feet  
To replace the docking base feet, follow these steps:  
1. Remove the top layer from the foot to expose the adhesive strip  
(Figure 3-195).  
2. Place the foot adhesive-side down into the circular indentation on the  
bottom of the docking base (Figure 3-195).  
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Replacing the Handle  
To replace the docking base handle, follow these steps:  
1. Using a Torx T8, remove the screw from the rear of the handle  
(Figure 3-196).  
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2. Slide the handle off the crankshaft (Figure 3-197).  
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3. Slide the new handle on the crankshaft until the handle seats.  
4. To secure the new handle to the crankshaft, replace the screw behind  
the handle.  
Chapter 3.31 Monitor Support Cover  
This section contains replacement procedures for the foot on the monitor  
support cover.  
To replace the foot, follow these steps:  
1. Turn the monitor support cover top-side down.  
2. Remove the top layer from the foot to expose the adhesive strip  
(Figure 3-198).  
3. Position the foot adhesive-side down on the exposed metal and press  
(Figure 3-198).  
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Chapter 4. Running POST and Test  
Introduction  
This chapter covers troubleshooting information for the computer. The  
basic steps in troubleshooting include:  
1. Follow the preliminary steps listed in Section 4.1.  
2. Run the Power-On Self-Test (POST) as described in Section 4.2.  
3. Run Computer Checkup (TEST) as described in Section 4.3.  
4. Follow the recommended action described in the diagnostic tables in  
Chapter 5, Section 5.1, 5.2, and 5.3 if you are unable to run POST or  
Computer Checkup, or if the problem still persists after they are run.  
When taking the recommended actions given in Section 5.2, 5.3, and 5.4,  
take them one at a time in the given order until the problem is solved and  
no error messages occur. Refer to Chapter 3 for any recommended removal  
and replacement procedures.  
NOTE: If a problem only occurs when an external device is connected to the  
computer, the problem may be with the external device or its cable.  
Verify this by running POST with and without the external device  
connected.  
Chapter 4.1 Preliminary Steps  
IMPORTANT: Use AC power when running POST, Computer Setup, and Computer  
Checkup. A low battery condition could initiate Standby and  
interrupt the program.  
Before running POST and Computer Checkup, complete the following  
preliminary steps:  
1. If a power-on password has been established, type the password and  
press the Enter key.  
NOTE: If the key symbol (ohm) appears on the screen when the computer is  
turned on, a power-on password has been established. If the password  
is unknown, it must be cleared (refer to "Clearing the Power-On  
Password" in this chapter).  
2. Verify that Computer Setup has been run. If not, run Computer Setup.  
3. Simultaneously press the Fn+F9 keys to adjust the brightness and the  
Fn+F8 keys to adjust contrast on the MSTN and CSTN displays.  
4. Turn off the computer and external devices.  
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5. Disconnect any external devices that you do not want to test. (Do not  
disconnect the printer if you want to test it or use it to log error  
messages.)  
6. Install loopback and terminating plugs in the serial and parallel  
connectors if you would like to test these ports.  
7. Ensure that the hard drive is installed in the computer.  
8. Connect the computer to an external AC power source with the battery  
pack inserted.  
When the preliminary steps are complete, you are ready to run POST  
(Section 4.2.) and Computer Checkup (Section 4.3).  
Clearing the Power-on Password  
IMPORTANT: Clearing the power-on password also clears the setup password  
and the CMOS that contains configuration information for all  
external devices. After clearing the power-on password, reset  
the setup password and run Computer Setup to restore the  
configuration information.  
If the password is unknown, clear it by completing the following steps:  
1. Turn off the computer by simultaneously pressing the left Ctrl+Alt keys  
and power button.  
2. Disconnect the power cord.  
3. Remove the battery pack (Section 3.2).  
4. Remove the keyboard cover (Section 3.7).  
5. Disable the power-on password by removing the real-time clock battery  
as referenced in the following removal procedures:  
- Section 3.9, "Real-Time Clock Battery for Models 400 and 410"  
- Section 3.10, "Real-Time Clock Battery for Models 420 and 430"  
6. Short the real-time clock battery terminals in the processor board by  
touching the battery terminals with two ends of a wire.  
7. Replace all components.  
IMPORTANT: Ensure that the battery pack is charged, since a low battery  
condition could initiate Hibernation and interrupt the  
procedure.  
8. Replace the battery pack (Section 3.2).  
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9. Connect the power cord (Section 3.2).  
10. Connect the power cord to the external outlet.  
11. Turn on the computer by pressing the power button.  
12. Verify that the power-on password has been cleared. If it has not been  
cleared, repeat steps 1 through 7. If the password is still not  
cleared refer to the following section for removal procedures.  
- Section 3.15, "System Board for Models 400, 410, 420 and 430"  
13. Run Computer Setup to reconfigure the system.  
Chapter 4.2 Power-On Self-Test (POST)  
The Power-On Self-Test (POST) is a series of diagnostic tests that run  
automatically when the system is turned on. POST detects which type of  
mass storage devices are installed in the computer and checks that the  
following assemblies are functioning properly:  
o System board  
o Processor board  
o Memory expansion board  
o Internal keyboard controller (self-test, report error if failed)  
o External keyboard (self-test, report error if failed)  
o Display  
o Video controller circuitry  
o Trackball assembly (identifies the trackball, but no actual test)  
o Hard drive  
o Diskette drive  
o System memory  
Running POST  
To run POST, complete the following steps:  
1. Turn off the computer by simultaneously pressing the left Ctrl+Alt keys  
and power button.  
2. Turn on the computer.  
- If POST does not detect any errors, the computer beeps one or two  
times to indicate that POST has successfully run, and the computer  
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boots from the hard drive (or from a bootable diskette if installed  
in the diskette drive). However, diskette drive may be disabled, and  
the computer cannot boot from the diskette drive.  
- If POST detects errors, the errors are indicated by screen and/or  
audible messages. Refer to "Power-On Self-Test (POST) Error  
Messages" in this section for a list of POST error messages, probable  
causes, and recommended actions.  
3. Take the recommended action for each error code, then repeat steps 1  
and 2 until POST runs successfully.  
After POST runs successfully, run Computer Checkup (Section 4.3).  
NOTE: If the system is not functioning well enough to run POST, or if the  
display is not functioning well enough to show POST error messages,  
refer to the troubleshooting tables in Section 5.4. Take the  
recommended actions, then repeat steps 1 and 2 until POST runs  
successfully.  
Chapter 4.3 Computer Checkup (TEST)  
After POST runs successfully, run the latest version of Computer Checkup  
(TEST). Computer Checkup determines if the computer assemblies and options  
are recognized by the system and functioning properly. Run Computer  
Checkup after installing or connecting a new assembly or option.  
Computer Checkup is installed on the hard drive. If the hard drive is  
nonfunctional, you can run it from a diskette.  
NOTE: It is recommended that you make diskette copies of Computer Checkup  
and keep them available for future need. A current copy can be  
obtained from the Compaq Customer Support Center.  
Running Computer Checkup  
To run Computer Checkup from the hard drive, complete the following steps:  
1. Turn off the computer by simultaneously pressing the left Ctrl+Alt keys  
and power button.  
2. Turn on the computer.  
3. When the cursor moves to the right side of the screen, press F10.  
The Configuration and Diagnostics menu is displayed.  
4. From the Configuration and Diagnostics menu, select Computer Checkup  
(TEST).  
A test option menu is displayed.  
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5. Select the option to view the device list.  
A list of the installed hardware devices is displayed.  
NOTE: Computer Checkup does not detect all non-Compaq devices.  
6. Verify that Computer Checkup correctly detected the installed devices.  
If the list is correct, select OK. The Computer Checkup option menu is  
displayed again.  
If the list is incorrect, verify that the new devices are installed  
properly.  
7. Select one of the following from the test option menu:  
- Quick Check Diagnostics -- This option runs a quick, general test on  
each device with a minimal number of prompts. If errors occur, they  
are displayed when the testing is complete.  
- Automatic Diagnostics -- This option runs an unattended, maximum  
test of each device with minimal prompts. You can choose how many  
times to run the tests, to stop on errors, or to print or file a log  
of errors.  
- Prompted Diagnostics -- This option allows maximum control over the  
device testing process. You can choose attended or unattended  
testing, decide to stop on errors, or choose to print or file a log  
of errors.  
8. Follow the instructions on the screen as the diagnostic tests are run  
on the devices.  
When the testing is complete, the test option menu is displayed again.  
9. Exit the test option menu.  
10. Exit the Configuration and Diagnostics menu.  
NOTE: Exiting the Configuration and Diagnostics menu restarts the  
computer and saves your changes.  
11. Look up the Computer Checkup error codes that were displayed by  
referring to "Computer Checkup (TEST) Error Codes" and take the  
recommended action.  
12. Rerun POST and Computer Checkup, taking the recommended actions in  
given order until the problem is solved and no error messages occur.  
Computer Checkup (TEST) Error Codes  
Computer Checkup (TEST) error codes (Section 5.2) occur if the system  
recognizes a problem while running Computer Checkup. These error codes  
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help identify possible defective assemblies. Tables 5-2 through 5-13 list  
Computer Checkup error codes, a description of the error condition, and  
the recommended action for resolving the condition. For removal and  
replacement procedures, refer to Chapter 3.  
IMPORTANT: Rerun Computer Checkup each time you complete a recommended  
action step. If the problem is resolved when POST and Computer  
Checkup are rerun (i.e., with no error codes), do not perform  
the remaining recommended action steps.  
NOTE: The error codes in the following tables are listed in an AYY-XX  
format, where:  
A or AA  
YY  
XX  
=
=
=
Number that represents the faulty assembly.  
Test or action that failed.  
Specific problem.  
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Chapter 5. Error Messages and Codes  
Introduction  
This chapter provides tables covering possible errors messages for the  
Power-On Self-Test (POST) and the Computer Checkup (TEST) diagnostics.  
Chapter 5.1 Power-On Self-Test (POST)  
POST error messages occur when problems are discovered during POST. Table  
5-1 lists visual error messages for POST, audible (beep) error messages,  
probable causes, and recommended actions.  
Table 5-1. Power-On Self-Test Messages  
===========================================================================  
Message  
Beeps  
Probable Cause  
Recommended Action  
===========================================================================  
101 - ROM  
Error  
1 Long,  
1 Short  
System ROM  
checksum  
1. Inspect the ROM  
placement.  
2. Replace the ROM.  
3. Flash the ROM.  
4. Replace the system board.  
---------------------------------------------------------------------------  
101 - I/0  
ROM Error  
None  
Option ROM  
checksum  
1. Inspect the ROM  
placement.  
2. Verify the correct ROM.  
3. Replace the ROM.  
---------------------------------------------------------------------------  
102 - System  
Board  
Failure  
None  
DMA, timers,  
etc. Unsupported  
processor  
1. Replace the processor  
board.  
2. Replace the system board.  
upgrade installed  
---------------------------------------------------------------------------  
162 - System  
Options  
Error  
2 Short  
No diskette drive  
or mismatch in  
drive type  
1. Run Computer Setup.  
2. Check diskette cable.  
3. Check diskette drive.  
---------------------------------------------------------------------------  
162 - System  
Options Not  
Set  
2 Short  
Configuration  
incorrect  
Run Computer Setup.  
---------------------------------------------------------------------------  
163 - Time &  
Date Not Set  
2 Short  
Invalid time or  
date in  
Run Computer Setup.  
configuration  
memory  
---------------------------------------------------------------------------  
164 - Memory  
Increase  
Detected  
2 Short  
Configuration  
memory incorrect  
The following steps apply to  
164 Memory Increase Detected  
and 164 Memory Decrease  
Detected error messages:  
164 - Memory  
Decrease  
Detected  
2 Short  
Configuration  
memory incorrect  
1. Autosetup will correct.  
2. Verify that memory board  
is installed correctly.  
3. Replace memory board.  
4. Replace system board.  
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---------------------------------------------------------------------------  
Message Beeps Probable Cause Recommended Action  
---------------------------------------------------------------------------  
168 - CMOS  
CheckSUM  
Invalid  
1. Autosetup will configure  
to the default settings.  
2. Run Computer Setup if  
configuration settings  
are other than default.  
---------------------------------------------------------------------------  
201 - Memory  
Error  
None  
RAM failure  
1. If installed, make sure  
the memory expansion  
board is installed  
correctly.  
2. If installed, clean the  
contacts of the memory  
expansion board and  
system board.  
3. Replace the memory  
expansion board (if  
applicable).  
4. Make sure the memory  
PC card is installed  
correctly by running  
PC card service and  
Computer Setup.  
5. Replace the memory  
PC card.  
6. Replace the system board.  
---------------------------------------------------------------------------  
203 - Memory  
Address  
None  
RAM failure  
See Message 201 above.  
Error  
---------------------------------------------------------------------------  
205 - Memory  
Error  
None  
Cache memory  
error  
1. Run Computer Checkup.  
2. Replace the system board.  
---------------------------------------------------------------------------  
207 -  
Invalid  
Memory  
None  
Memory module  
installed  
incorrectly  
Verify placement of memory.  
Configuration  
Module  
---------------------------------------------------------------------------  
209 - NCA RAM  
Error  
None  
RAM Failure  
Run Computer Checkup.  
---------------------------------------------------------------------------  
211 - Memory  
Failure  
None  
RAM Failure  
Run Computer Checkup.  
---------------------------------------------------------------------------  
301 -  
Keyboard  
Error  
None  
Keyboard Failure  
1. Check external keyboard  
for stuck key or loose  
cable.  
2. Replace system board.  
---------------------------------------------------------------------------  
Message Beeps Probable Cause Recommended Action  
---------------------------------------------------------------------------  
301 -  
None  
Keyboard Failure  
1. Check external keyboard.  
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Keyboard  
2. Replace system board.  
Error or Text  
Fixture  
Installed  
---------------------------------------------------------------------------  
303 -  
None  
System board  
keyboard  
controller  
Replace the system board.  
Keyboard  
Controller  
Error  
---------------------------------------------------------------------------  
304 - Keyboard  
or System Unit  
Error  
None  
Keyboard  
1. Check external keyboard.  
2. Replace system board.  
---------------------------------------------------------------------------  
401 - Printer  
Error  
None  
Printer  
controller  
Replace the system board, if  
applicable.  
---------------------------------------------------------------------------  
402 -  
1 Long,  
2 Short  
Monochrome  
display  
controller  
Replace the monochrome  
display controller.  
Monochrome  
Adapter  
Failure  
---------------------------------------------------------------------------  
501 - Display  
Adapter  
1 Long,  
2 Short  
Video display  
controller  
Replace the display panel.  
Failure  
---------------------------------------------------------------------------  
601 - Diskette  
Controller  
Error  
None  
Diskette  
controller  
circuitry  
1. Make sure diskette drive  
cable is seated.  
2. Replace the diskette  
drive cable.  
3. Replace the diskette  
drive.  
4. Replace the system board.  
---------------------------------------------------------------------------  
602 - Diskette  
Boot  
None  
Diskette in drive  
A not bootable  
1. Replace the diskette.  
2. Replace the diskette  
drive.  
3. Replace the system board.  
---------------------------------------------------------------------------  
Message Beeps Probable Cause Recommended Action  
---------------------------------------------------------------------------  
605 - Diskette  
Drive Error  
2 Short  
Mismatch in drive  
type  
Run Computer Setup.  
---------------------------------------------------------------------------  
702 -  
None  
Coprocessor  
1. Replace the processor  
upgrade.  
2. Replace the system board.  
Coprocessor  
Detection  
Error  
---------------------------------------------------------------------------  
702A -  
2 Short  
Coprocessor  
1. Replace the processor  
upgrade.  
2. Replace the system board.  
Coprocessor  
Detection  
Error  
---------------------------------------------------------------------------  
703 - CMOS  
Reports A  
Coprocessor  
That Has Not  
2 Short  
Coprocessor or  
configuration  
error  
1. Run the Configuration  
utility.  
2. Replace the processor  
upgrade.  
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Been Detected  
by POST  
3. Replace the system board.  
---------------------------------------------------------------------------  
1125 -  
2 Short  
Defective  
internal serial  
port  
1. Run Computer Setup and  
Check it.  
2. Replace the system board.  
Internal  
Serial Port  
Failure  
---------------------------------------------------------------------------  
1780 - Disk 0  
Failure  
None  
Hard drive/format  
error  
1. Run Computer Checkup.  
2. Replace the drive.  
---------------------------------------------------------------------------  
1782 - Disk  
Controller  
None  
Hard drive  
circuitry error  
1. Run Computer Checkup.  
2. Replace the drive.  
---------------------------------------------------------------------------  
1790- Disk 0  
Failure  
None  
Hard drive error  
or wrong drive  
type  
1. Run Computer Setup and  
Computer Checkup.  
2. Change drive type.  
3. Replace the drive.  
---------------------------------------------------------------------------  
Audible  
1 Short  
Power-on  
None.  
successful  
---------------------------------------------------------------------------  
Audible  
2 Short  
Power-on  
None.  
successful  
---------------------------------------------------------------------------  
(RESUME = F1  
KEY)  
None  
As indicated to  
continue  
Press the F1 key.  
===========================================================================  
Chapter 5.2 Computer Checkup (TEST) Error Codes  
Computer Checkup (TEST) error codes occur if the system recognizes a  
problem while running Computer Checkup. These error codes help identify  
possible defective assemblies. Tables 5-2 through 5-12 list Computer  
Checkup error codes, a description of the error condition, and the  
recommended action for resolving the condition. For removal and  
replacement procedures, refer to Chapter 3.  
IMPORTANT: Rerun Computer Checkup each time you complete a recommended  
action step. If the problem is resolved when POST and Computer  
Checkup are rerun (i.e., with no error codes), do not perform  
the remaining recommended action steps.  
NOTE: The error codes in the following tables are listed in an AYY-XX  
format, where:  
A or AA  
YY  
=
=
=
Number that represents the faulty assembly.  
Test or action that failed.  
Specific problem.  
XX  
Table 5-2. Processor Computer Checkup Error Codes  
===========================================================================  
Error Code  
Description  
Recommended Action  
===========================================================================  
101 - xx  
102 - xx  
CPU test failed  
Replace the system board.  
Replace the system board.  
Coprocessor error  
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103 - xx  
104 - xx  
DMA page registers test  
failed  
Replace the system board.  
Replace the system board.  
Replace the system board.  
Interrupt controller  
master test failed  
105 - xx  
106 - xx  
Port 61 error  
Keyboard controller  
self-test failed  
1. If using an external  
keyboard, try another  
keyboard. If second  
keyboard passes, replace  
first one.  
2. Replace the system board.  
Replace the system board.  
Replace the system board.  
Replace the system board.  
107 - xx  
108 - xx  
109 - xx  
CMOS RAM test failed  
CMOS interrupt test failed  
CMOS clock load data test  
failed  
110 - xx  
Programmable timer load  
data test failed  
Replace the system board.  
111 - xx  
112 - xx  
Refresh detect test failed  
Replace the system board.  
Replace the system board.  
Speed test slow mode out  
of range  
113 - 01  
114 - 01  
Protected mode test failed  
Speaker test failed  
Replace the system board.  
1. Check system configuration  
to verify that speaker is  
enabled.  
2. Replace the keyboard  
assembly.  
3. Replace the system board.  
116 - xx  
Cache test failed  
Replace the system board.  
===========================================================================  
Table 5-3. Memory Computer Checkup Error Codes  
===========================================================================  
Error Code  
Description  
Recommended Action  
===========================================================================  
200 - xx  
Invalid memory  
configuration  
1. Run Computer Setup.  
2. Replace the system board.  
---------------------------------------------------------------------------  
201 - xx  
202 - xx  
Memory machine ID test  
failed  
The following steps apply to  
201 - xx through 202 - xx error  
codes:  
1. Run Computer Setup.  
2. Replace the system board.  
Memory system ROM  
checksum failed  
---------------------------------------------------------------------------  
203 - xx  
Memory write/read test  
failed  
The following steps apply to  
203 - xx through 210 - xx error  
codes:  
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204 - xx  
Memory address test  
failed  
If you don't have a memory  
expansion board, replace the  
system board.  
206 - xx  
210 - xx  
Increment pattern test  
failed  
If you have a memory expansion  
board:  
Random pattern test  
failed  
1. Remove the memory expansion  
board and reinstall a new  
board.  
2. Replace the memory  
expansion board.  
===========================================================================  
Table 5-4. Keyboard Computer Checkup Error Codes  
===========================================================================  
Error Code  
Description  
Recommended Action  
===========================================================================  
301 - xx  
Keyboard short test  
1. Check the keyboard  
8042 self-test failed  
connection. If disconnected,  
turn off the computer and  
connect the keyboard.  
2. Replace the keyboard.  
3. Replace the system board.  
---------------------------------------------------------------------------  
302 - xx  
Keyboard long test  
failed  
1. Check the keyboard  
connection. If disconnected,  
turn off the computer and  
connect the keyboard.  
2. Replace the keyboard.  
3. Replace the system board.  
---------------------------------------------------------------------------  
303 - xx  
Keyboard indicator  
test, 8042 self-test  
failed  
1. Replace the system board.  
2. If an external keyboard is  
being used, replace the  
external keyboard.  
---------------------------------------------------------------------------  
304 - xx  
Keyboard typematic test  
failed  
1. Check the keyboard  
connection. If disconnected,  
turn off the computer and  
connect the keyboard.  
2. Replace the keyboard.  
3. Replace the system board.  
===========================================================================  
Table 5-5. Parallel Printer Computer Checkup Error Codes  
===========================================================================  
Error Code  
Description  
Recommended Action  
===========================================================================  
401 - xx  
402 - xx  
403 - xx  
498 - xx  
Printer failed or not  
connected  
The following steps apply to  
401 - xx through 498 - xx error  
codes:  
1. Connect the printer.  
2. Check power to the printer.  
3. Install the loopback  
connector.  
Printer data register  
failed  
Printer pattern test  
failed  
4. Replace the system board.  
Printer failed or not  
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connected  
===========================================================================  
Table 5-6. Diskette Drive Computer Checkup Error Codes  
===========================================================================  
Error Code  
Description  
Recommended Action  
===========================================================================  
600 - xx  
Diskette ID drive types  
test failed  
The following steps apply to  
600 - xx through 698 - xx error  
codes:  
601 - xx  
602 - xx  
Diskette format failed  
1. Replace the diskette.  
2. Check and/or replace the  
diskette cable.  
3. Replace the diskette drive.  
4. Replace the system board.  
Diskette read test  
failed  
603 - xx  
604 - xx  
605 - xx  
606 - xx  
607 - xx  
608 - xx  
609 - xx  
610 - xx  
Diskette write, read,  
compare test failed  
Diskette random seek  
test failed  
Diskette ID media  
failed  
Diskette speed test  
failed  
Diskette wrap test  
failed  
Diskette write-protect  
test failed  
Diskette reset  
controller test failed  
Diskette change line  
test failed  
697 - xx  
698 - xx  
Diskette type error  
Diskette drive speed  
not within limits  
---------------------------------------------------------------------------  
699 - xx  
Diskette drive/media  
ID error  
1. Replace media.  
2. Run Computer Setup.  
===========================================================================  
Table 5-7. Serial Computer Checkup Error Codes  
===========================================================================  
Error Code  
===========================================================================  
1101 - xx Serial Port test Replace the system board.  
Description  
Recommended Action  
===========================================================================  
Table 5-8. Modem Communications Computer Checkup Error Codes  
===========================================================================  
Error Code  
===========================================================================  
1201 - xx Modem Internal Loopback The following steps apply to  
Description  
Recommended Action  
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Test  
1201 - xx through 1210 - xx  
error codes:  
1202 - xx  
1203 - xx  
1204 - xx  
1206 - xx  
1210 - xx  
Modem Timeout Test  
1. Refer to modem  
documentation for correct  
setup procedures.  
2. Check the modem line.  
3. Replace the modem.  
Modem External  
Termination Test  
Modem Auto Originate  
Test  
Dial Multifrequency  
Tone Test  
Modem Direct Connect  
Test  
===========================================================================  
Table 5-9. Hard Drive Computer Checkup Error Codes  
===========================================================================  
Error Code  
Description  
Recommended Action  
===========================================================================  
1700 - xx  
1701 - xx  
1702 - xx  
1703 - xx  
1704 - xx  
1705 - xx  
1706 - xx  
1707 - xx  
1708 - xx  
1709 - xx  
1710 - xx  
1714 - xx  
1715 - xx  
Hard ID drive types  
test failed  
The following steps apply to  
1700 - xx through 1799 - xx  
error codes:  
1. Run Computer Setup and  
verify drive type.  
2. Reset the hard drive.  
3. Try another hard drive. If  
first drive was defective,  
try to recover data.  
Hard drive format  
test failed  
Hard drive read test  
failed  
Hard drive write/read/  
compare test failed  
4. Replace the system board  
Hard drive random seek  
test failed  
Hard drive controller  
test failed  
Hard drive ready test  
failed  
Hard drive recalibration  
test failed  
Hard drive format bad  
track test failed  
Hard drive reset  
controller test failed  
Hard drive park head  
test failed  
Hard drive file write  
test failed  
Hard drive head select  
test failed  
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1716 - xx  
1717 - xx  
1719 - x  
1799 - xx  
Hard drive conditional  
format test failed  
Hard drive ECC * test  
failed  
Hard drive power mode  
test failed  
Invalid hard drive  
type failed  
---------------------------------------------------------------------------  
Error Correction Code  
*
===========================================================================  
Table 5-10. Graphics Computer Checkup Error Codes  
===========================================================================  
Error Code  
Description  
Recommended Action  
===========================================================================  
2402 - xx  
2403 - xx  
2404 - xx  
2405 - xx  
Video memory test  
failed  
The following step applies to  
2402 - xx through 2480 - xx  
error codes:  
Video attribute test  
failed  
Replace the system board.  
Video character set  
test failed  
Video 80 x 25 mode  
9 x 14 character cell  
test failed  
2406 - xx  
2408 - xx  
2409 - xx  
Video 80 x 25 mode  
8 x 8 character cell  
test failed  
Video 320 x 200 mode  
color set 0 test  
failed  
Video 320 x 200 mode  
color set 1 test  
failed  
2410 - xx  
2412 - xx  
2414 - xx  
2416 - xx  
2418 - xx  
Video 640 x 200 mode  
test failed  
Video gray scale  
test failed  
Video white screen  
test failed  
Video noise pattern  
test failed  
ECG/VGC memory test  
failed  
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2419 - xx  
2421 - xx  
ECG/VGC ROM checksum  
test failed  
ECG/VGC 640 x 200  
graphics mode test  
failed  
---------------------------------------------------------------------------  
Error Code Description Recommended Action  
---------------------------------------------------------------------------  
2422 - xx  
2423 - xx  
2424 - xx  
2425 - xx  
ECG/VGC 640 x 350 16  
color set test failed  
The following step applies to  
2402 - xx through 2480 - xx  
error codes:  
ECG/VGC 640 x 350 64  
color set test failed  
Replace the system board.  
ECG/VGC monochrome text  
mode test failed  
ECG/VGC monochrome  
graphics mode test  
failed  
2431 - xx  
2432 - xx  
640 x 480 graphics test  
failure  
320 x 200 graphics  
(256 color mode) test  
failure  
2448 - xx  
2451 - xx  
2456 - xx  
2458 - xx  
2468 - xx  
2477 - xx  
2478 - xx  
2480 - xx  
Advanced Graphics  
Controller test failed  
132 - column Advanced  
Graphics test failed  
Advanced Graphics 256  
Color test failed  
Advanced Graphics  
BitBLT test  
Advanced Graphics DAC  
test  
Advanced Graphics data  
path test  
Advanced Graphics  
BitBLT test  
Advanced Graphics Line  
draw test  
===========================================================================  
Table 5-11. Pointing Device Interface Computer Checkup Error Codes  
===========================================================================  
Error Code  
Description  
Recommended Action  
===========================================================================  
8601 - xx  
Pointing Device  
Interface test failed.  
1. Run SETUP, check trackball  
settings.  
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2. Clean trackball.  
3. Ensure trackball connector  
is seated properly.  
4. Replace the trackball  
assembly.  
5. Replace the system board.  
===========================================================================  
Chapter 5.3 Troubleshooting without Error Messages  
This section contains troubleshooting information that provides a quick  
reference for diagnosing problems that cannot be identified by running  
POST or Computer Checkup (such as a non-functional display that does not  
allow viewing error messages). For additional information refer to the  
tables 5-12 through 5-27 in Section 5.3.  
Since symptoms can appear to be similar, carefully match the symptoms of  
the computer malfunction against the problem description in the  
troubleshooting tables to avoid a misdiagnosis.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
To avoid a potential shock hazard during troubleshooting procedures,  
disconnect all power sources before removing the keyboard assembly or the  
display bezel.  
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<  
Before Replacing Parts When Troubleshooting  
When troubleshooting a problem, check the following list for possible  
solutions before replacing parts:  
o Verify that cables are connected properly to the suspected defective  
parts. Try reseating the cables even if they appear to be properly  
connected.  
o Run Computer Setup after connecting external devices.  
o Verify that all required device drivers are installed.  
o Verify that all required changes have been made to the CONFIG.SYS file.  
o Verify that all required changes have been made to the AUTOEXEC.BAT  
file.  
o Verify that printer drivers have been installed for each application.  
Table 5-12. Solving Power Problems  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
===========================================================================  
Computer will not turn  
on when plugged in and  
battery pack is  
AC Adapter may be  
defective.  
1. Replace AC Adapter.  
2. Remove battery pack;  
insert another battery  
pack and try to turn on  
computer again.  
inserted.  
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---------------------------------------------------------------------------  
Computer is beeping and  
battery indicator is  
flashing.  
Computer has  
entered a low  
battery condition.  
Immediately save any open  
file(s). Then do any one  
of the following:  
o Connect the computer to  
an external power source,  
then charge the battery  
pack.  
o Replace the battery pack  
with a fully charged  
battery pack.  
o Initiate Hibernation  
(press the Fn key and  
power button  
simultaneously) to  
completely halt the power  
consumption on the  
battery pack, or initiate  
Standby by pressing the  
power button once to  
reduce power consumption  
until the battery pack  
can be recharged or  
another power source can  
be connected.  
---------------------------------------------------------------------------  
Problem Probable Cause Solution(s)  
---------------------------------------------------------------------------  
Computer turned off  
while left unattended.  
Power indicator is  
off.  
System initiated  
Hibernation due  
to a low battery  
condition.  
Install a fully charged  
battery pack or connect the  
computer to an external  
power source, then turn on  
the computer.  
------------------------------------------------  
System initiated  
Hibernation  
Turn on the computer.  
according to Power  
Management  
settings.  
---------------------------------------------------------------------------  
The computer has no  
power at all when the  
power switch is  
Power switch not  
functioning.  
1. Determine if the power  
switch is functioning by  
removing the battery  
and connecting the AC  
power cord to the unit.  
2. Replace the keyboard  
assembly.  
activated. All  
indicators are off. If  
the other indicators  
come on for any period  
of time (even for a  
momentary flash), this  
is not a "no power"  
problem.  
------------------------------------------------  
Defective keyboard  
assembly.  
Install a new keyboard  
assembly.  
---------------------------------------------------------------------------  
Unit powers up from AC  
power, but not from the  
battery.  
Battery not  
charged.  
Charge the battery fully.  
------------------------------------------------  
Defective battery. Install another battery.  
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------------------------------------------------  
Battery contacts  
not making good  
contact with  
battery.  
Remove the keyboard  
assembly and examine the  
battery contacts. Ensure  
that the battery is making  
good contact with all 4  
contacts.  
Replace the system board.  
------------------------------------------------  
Defective system  
board.  
Replace the system board.  
---------------------------------------------------------------------------  
Problem Probable Cause Solution(s)  
---------------------------------------------------------------------------  
The computer has a  
crowbar condition: it  
powers up for a short  
period, then shuts off.  
indicators flash on,  
then off (this takes  
place in less than 3  
seconds).  
Short circuit on  
one of the power  
supply outputs.  
1. Remove the following  
parts one at a time  
until the short circuit  
is located:  
NOTE: After verifying  
that a part is not the  
cause of the short  
circuit, reinstall it  
before removing the next  
part. In addition, note  
that the first three  
parts can be checked by  
the user.  
a. PC card  
b. Battery pack  
c. Hard drive  
d. Diskette drive  
e. Internal AC power  
supply  
2. Disconnect the display  
cable from the system  
board and power the  
unit up. If the unit  
powers up, the display  
cable or display  
assembly has failed.  
Plug the display cable  
back into the system  
board and attempt to  
find the defective  
part in the display  
assembly by completing  
the following steps  
one at a time until  
the short circuit is  
located:  
a. Disconnect the  
display cable from  
the inverter board  
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and attempt to  
power the unit up.  
If the unit powers  
up, replace the  
inverter board.  
b. Disconnect the  
display cable from  
the display panel  
and power the unit  
up. If the unit  
powers up, replace  
the display panel.  
c. Replace the display  
cable.  
3. Replace the system  
board.  
===========================================================================  
Table 5-13. Solving System Start Problems  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
===========================================================================  
System powers up (LEDs  
on) but it does not  
begin POST.  
Bad contacts  
between processor  
board and system  
board.  
Replace system board.  
------------------------------------------------  
Defective  
Replace system board.  
processor board.  
------------------------------------------------  
Defective system  
board.  
Replace system board.  
===========================================================================  
Table 5-14. Solving Standby Problems  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
===========================================================================  
The power/standby button  
is pressed, but the unit  
does not go into  
Defective keyboard  
assembly.  
------------------------------------------------  
Replace the keyboard  
assembly.  
standby.  
Defective system  
board.  
Replace the system board.  
===========================================================================  
Table 5-15. Solving Battery Problems  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
===========================================================================  
Battery indicator  
Low battery beeps  
were turned off.  
Use Power Management to  
turn on the low battery  
warning beeps.  
flashes to indicate low  
battery condition, but  
computer does not beep.  
------------------------------------------------  
Volume is turned  
on/off.  
Press the Fn + F5 keys.  
---------------------------------------------------------------------------  
Battery indicator  
doesn't light and  
battery pack won't fast  
charge.  
Battery pack is  
already charged.  
------------------------------------------------  
Battery pack was Allow time for the battery  
No action is necessary.  
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exposed to  
temperature  
extremes.  
pack to return to room  
temperature.  
------------------------------------------------  
Battery pack is at  
end of its life.  
Replace battery pack.  
---------------------------------------------------------------------------  
Battery charge does not  
last as long as  
expected.  
Battery is being  
exposed to high  
temperatures. *  
Keep computer at a cooler  
temperature and recharge  
the battery.  
------------------------------------------------  
Battery is being  
exposed to cold  
temperatures. *  
Put computer in a warmer  
place and recharge the  
battery.  
------------------------------------------------  
Battery has  
partially  
Recharge the battery.  
self-discharged.  
------------------------------------------------  
Power conservation  
is disabled or set  
to "None."  
Set a power conservation  
level.  
------------------------------------------------  
An external device  
or PCMCIA card is  
draining the  
Turn off or remove the  
external device when not  
using it.  
battery.  
------------------------------------------------  
Defective battery.  
Condition the battery.  
Install another battery. If  
this fixes the problem,  
original battery is  
defective.  
Replace the battery.  
---------------------------------------------------------------------------  
Battery pack is warm to  
the touch after  
charging.  
Normal warming has  
occurred due to  
charging.  
No action is required.  
---------------------------------------------------------------------------  
Battery indicator does  
not come on and the  
battery gauge does not  
reflect a change in  
battery charge level.  
Battery pack is  
trickle charging.  
Allow battery pack to  
continue charging for 30  
minutes and recheck the  
battery gauge.  
------------------------------------------------  
Battery contacts  
not making good  
contact with  
battery.  
Remove the keyboard  
assembly and examine the  
battery contacts. Ensure  
that the battery is  
making good contact with  
all 4 contacts. If not,  
gently bend the contacts on  
the system board out to  
make good contact.  
------------------------------------------------  
Defective system  
board.  
Replace the system board.  
---------------------------------------------------------------------------  
Download from Www.Somanuals.com. All Manuals Search And Download.  
* The recommended storage temperature range for the battery pack is -4oF to  
86oF (-20oC to 30oC ). The recommended operating temperature range is  
50oF to 104oF (10oC to 40oC).  
===========================================================================  
Table 5-16. Solving Battery Gauge Problems  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
===========================================================================  
Battery gauge appears  
inaccurate.  
Battery pack has been  
partially recharged  
too many times or  
computer has been in  
Standby for an  
Charge the battery pack *  
(Appendix B).  
NOTE: The battery gauge is  
not linear. It will not  
necessarily stay on each  
indicator the same amount  
of time. The battery gauge  
is based on voltage output  
from the battery.  
extended period of  
time.  
---------------------------------------------------------------------------  
* The battery pack needs to be conditioned every 60 days to maintain  
battery gauge accuracy.  
===========================================================================  
Table 5-17. Solving Display Problems  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
===========================================================================  
Characters are dim.  
From MS-DOS: Power  
Management settings  
is set on high or  
custom.  
From MS-DOS: Change Power  
Management settings to  
medium.  
From Windows: Adjust  
brightness setting in  
Power Management.  
From Windows: Power  
Management brightness  
setting is incorrect.  
---------------------------------------------------  
Brightness or  
contrast (if  
applicable) is not  
set properly.  
Press the Fn + F9 keys.  
Use arrows keys to adjust  
the brightness. Press the  
Fn + F8 keys. Use arrows  
keys to adjust the  
contrast.  
NOTE: Contrast adjustment  
is not applicable on  
models with Color TFT  
displays.  
---------------------------------------------------  
Computer screen is in  
direct light.  
Tilt display or move  
computer.  
---------------------------------------------------------------------------  
Screen is blank.  
Quick Blank is  
initiated.  
Enter password to exit  
QuickBlank.  
---------------------------------------------------  
Another screen  
blanking utility may  
be installed.  
Press any key and/or enter  
password.  
---------------------------------------------------  
Screen save was  
initiated by Power  
Management due to  
Press any key or click the  
mouse.  
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lack of user  
activity.  
---------------------------------------------------  
Brightness and  
contrast needs  
adjusting.  
Press the Fn + F9 keys to  
adjust the brightness. Use  
the left and right arrow  
keys to adjust brightness.  
Press the Fn + F8 keys to  
adjust the contrast.  
---------------------------------------------------  
Display has  
overheated.  
If computer is in direct  
sunlight, move it and allow  
it to cool off.  
---------------------------------------------------------------------------  
Display is blank and  
the Power/standby  
indicator is  
System is in Standby.  
Press the Power/standby  
button to exit Standby.  
flashing.  
---------------------------------------------------------------------------  
Problem Probable Cause Solution(s)  
---------------------------------------------------------------------------  
Screen is blank, the  
Power/standby  
indicator is  
flashing, and the  
battery indicator is  
flashing.  
System has entered a  
low battery Standby  
condition. The  
computer will next  
activate Hibernation,  
if this feature is  
not disabled.  
If available, immediately  
connect the computer to an  
external power source or  
insert a charged battery  
pack. Then press the  
standby button to exit  
Standby.  
If another power source is  
not immediately available  
and Hibernation is  
disabled, attempt to exit  
Standby and save any open  
files. However, the  
computer may not have  
enough power to do this.  
If you have not disabled  
Hibernation, the computer  
automatically hibernates.  
Do not interfere with the  
computer while it is  
hibernating. Once the  
computer has turned off,  
insert a charged battery  
pack or connect the  
computer to another power  
source, then turn the  
computer back on.  
---------------------------------------------------------------------------  
Computer display is  
blank and the screen  
on an external  
monitor displays  
information.  
Display function was  
switched to the  
external monitor.  
Press the Fn + F4 keys to  
activate the computer  
display. Press the keys  
again to display  
information simultaneously.  
**  
---------------------------------------------------------------------------  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Distorted or garbled  
characters on the  
display are mixed  
with text.  
The ANSI.SYS driver  
is not in the  
CONFIG.SYS file or  
the path is  
Add the ANSI.SYS driver to  
the CONFIG.SYS file. Add  
the following line:  
DEVICE=C:\ANSI.SYS  
incorrect.  
---------------------------------------------------------------------------  
Computer display  
flashes or has  
garbled characters  
when computer is  
connected to external  
monitor.  
Using 800 x 600 or  
higher resolution on  
external monitor and  
have toggled back to  
internal display,  
Restart the computer. If  
simultaneous display is  
desired, use 640 x 480  
resolution. **  
which only supports  
640 x 480 resolution.  
---------------------------------------------------------------------------  
** When using an external monitor and simultaneously displaying an image on  
the internal display, the image on the external monitor may not fill the  
screen.  
---------------------------------------------------------------------------  
Problem  
Probable Cause  
Solution(s)  
---------------------------------------------------------------------------  
Computer display and  
external monitor do  
not display  
External monitor was  
connected after the  
computer was turned  
on.  
Turn the computer off and  
connect the external  
monitor on, then turn on  
the computer.  
information  
simultaneously.  
Press the Fn + F4 keys to  
"toggle" through the three  
display possibilities.  
---------------------------------------------------------------------------  
The light tubes on  
the edge of the  
External monitor was  
connected when the  
computer was turned  
on.  
If an external monitor is  
detected during POST, only  
the external monitor will  
turn on. Press the Fn + F4  
keys to activate the  
computer display.  
1. Reseat the display cable  
to the system board.  
2. Reseat the display cable  
to the inverter board.  
3. Reseat the backlight  
cable to the inverter  
board.  
display panel do not  
light up at all and  
Power-On Self-Test  
(POST) completes when  
the unit is powered  
up. **  
Improper backlight or  
display cable  
connections.  
---------------------------------------------------  
Defective inverter  
board.  
Replace the inverter board.  
---------------------------------------------------  
Defective display  
cable.  
Replace the display cable.  
---------------------------------------------------  
Defective display  
panel.  
Replace the display panel.  
---------------------------------------------------  
Defective system  
board.  
Replace the system board.  
---------------------------------------------------------------------------  
The light tubes on  
the edge of the  
Defective system  
board.  
Replace the system board.  
display panel do not  
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light up at all and  
Power-On-Self-Test  
(POST) does not  
complete when the  
unit is powered  
up. ****  
---------------------------------------------------------------------------  
** When using an external monitor and simultaneously displaying an image  
on the internal display, the image on the external monitor may not  
fill the screen.  
**** Blocks usually appear in an even fraction of the display (1/2, 1/4/,  
1/6, 1/8, etc.)  
---------------------------------------------------------------------------  
Problem  
Probable Cause  
Solution(s)  
---------------------------------------------------------------------------  
Backlight  
Power conservation  
mode settings are  
set high, causing  
a dim display.  
Verify that you are not in  
a power conservation mode  
that limits the output of  
the backlight.  
(brightness) cannot  
be adjusted with  
brightness control  
pop-up Fn + F9  
keys. *  
---------------------------------------------------  
Improper display  
cable connections.  
1. Reseat the display  
cable to the inverter  
board.  
2. Reseat the display cable  
to the system board.  
---------------------------------------------------  
Defective inverter  
board.  
Replace the inverter board.  
***  
---------------------------------------------------  
Defective display  
cable.  
Replace the display cable.  
***  
---------------------------------------------------  
Defective system  
board.  
Replace the system board.  
***  
---------------------------------------------------------------------------  
Contrast cannot be  
adjusted with the  
Fn + F8 keys. *  
Improper display  
cable connections.  
Reseat the display cable  
to the following one at a  
time until the problem is  
solved:  
a. Inverter board.  
b. System board.  
c. Display panel.  
---------------------------------------------------  
Defective inverter  
board.  
Replace the inverter board.  
***  
---------------------------------------------------  
Defective display  
cable.  
Replace the display cable.  
***  
---------------------------------------------------  
Defective display  
panel.  
Replace the display panel.  
***  
---------------------------------------------------------------------------  
The display panel has  
a continuous pattern  
across it (e.g., a  
Improper display  
cable connections.  
Reseat the display cable to  
the following until the  
problem is solved:  
Download from Www.Somanuals.com. All Manuals Search And Download.  
"jailbars" pattern),  
has a single color  
on it, or has garbled  
graphics across the  
entire panel. This  
failure is for  
a. System board  
b. Display panel  
c. Inverter board  
---------------------------------------------------  
Defective display  
cable  
Replace the display cable.  
patterns across the  
entire panel (not  
just on one section).  
---------------------------------------------------  
Defective inverter  
board.  
Replace the inverter board.  
---------------------------------------------------  
Defective system  
board.  
Replace the system board.  
---------------------------------------------------------------------------  
A single line, small  
group of lines, or  
block appears on the  
display panel. This  
failure occurs in  
Defective display  
panel  
Replace the display panel.  
only a section of the  
display panel. ****  
---------------------------------------------------------------------------  
A number of single  
pixels are out or  
dots of various  
colors are visible  
on a black screen.  
Acceptable according  
to specifications.  
Check the number of pixels  
that are out against Compaq  
specifications. A certain  
number of pixels are  
allowed to be out, due to  
limitations in LCD  
technology.  
---------------------------------------------------  
Defective display  
panel.  
If the number of pixels  
that are out is beyond  
Compaq specifications,  
replace the display panel.  
---------------------------------------------------  
Defective system  
board.  
Replace system board.  
---------------------------------------------------------------------------  
* Press the Fn + F9 keys to adjust the brightness, setting.  
Additionally, on the MSTN and CSTN models, press the Fn + F8 keys to  
adjust the contrast setting.  
** When using an external monitor and simultaneously displaying an image  
on the internal display, the image on the external monitor may not  
fill the screen.  
*** This problem indicates that the backlight or its power circuitry has  
failed. Since you cannot observe the POST results on the display panel  
when the backlight is not functioning, connect the unit to an external  
monitor before powering the unit up. If an external monitor is not  
available, verify that POST completes by listening for the single or  
double beep, and watching for the indicators to turn on at the top of  
the keyboard.  
**** Blocks usually appear in an even fraction of the display (1/2, 1/4,  
1/6, 1/8, etc.).  
===========================================================================  
Table 5-18. Solving Diskette/Diskette Drive Problems  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
Download from Www.Somanuals.com. All Manuals Search And Download.  
===========================================================================  
Diskette drive  
indicator stays on.  
Diskette is damaged.  
Run CHKDSK on the diskette.  
At the system prompt, type:  
CHKDSK A:  
---------------------------------------------------  
Software program is  
damaged.  
Check the program  
diskettes.  
---------------------------------------------------------------------------  
Diskette drive cannot  
write to a diskette.  
Diskette is  
write-protected.  
Disable the diskette's  
write-protect feature or  
use a diskette that is not  
write-protected.  
---------------------------------------------------  
Computer is writing  
to the wrong drive.  
Check the drive letter in  
the path statement.  
---------------------------------------------------  
Drive error has  
occurred.  
Run Computer Checkup.  
---------------------------------------------------  
Diskette is not  
formatted.  
Format the diskette.  
---------------------------------------------------------------------------  
Diskette drive cannot  
read a diskette.  
The wrong type of  
diskette is being  
used.  
Use the type of diskette  
required by the drive.  
---------------------------------------------------  
Diskette has a bad  
sector.  
Copy files to hard drive or  
another diskette. Reformat  
bad diskette.  
---------------------------------------------------  
Drive error has  
occurred.  
Run Computer Checkup.  
---------------------------------------------------  
Diskette is not  
formatted.  
Format the diskette.  
===========================================================================  
Table 5-19. Solving Hard Drive Problems  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
===========================================================================  
Reading hard drive  
takes an unusually  
long time after  
restarting the  
computer.  
System entered  
Give the system time to  
restore the previously  
saved data to its exact  
state before Hibernation.  
Hibernation due to  
low battery condition  
and is now exiting  
from it.  
---------------------------------------------------------------------------  
Hard drive error  
occurs.  
Hard drive has bad  
sectors or has  
failed.  
Run Computer Checkup.  
---------------------------------------------------------------------------  
Hard drive does not  
work.  
Hard drive is not  
seated properly.  
Turn off and unplug the  
computer, remove the  
battery pack, and remove  
and then reinsert the hard  
drive.  
---------------------------------------------------------------------------  
Hard drive was  
removed and replaced  
while computer was  
Turn off computer then turn  
it on again. Before  
removing the hard drive,  
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on, in Standby, or in  
Hibernation.  
make sure computer is off,  
unplugged, and the battery  
pack is removed.  
===========================================================================  
Table 5-20. Solving External Device Installation Problems  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
===========================================================================  
A new device is not  
recognized as part of  
the computer system.  
Computer Setup has  
not been run to  
configure the new  
device.  
Run Computer Setup.  
---------------------------------------------------  
Cable(s) of new  
Ensure that all cables are  
properly and securely  
connected.  
external device are  
loose or power cables  
are unplugged.  
---------------------------------------------------  
Power switch of new  
external device was  
not turned on when  
the computer was  
powered up.  
Turn off the computer, turn  
on the external device,  
then turn on the computer  
to integrate the device  
with the computer system.  
---------------------------------------------------  
Device is not seated  
properly.  
Turn off the computer and  
reinsert the device.  
===========================================================================  
Table 5-21. Solving Keyboard/Numeric Keypad Problems  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
===========================================================================  
Embedded numeric  
keypad on computer  
keyboard is disabled.  
Num Lock function is  
not turned on.  
Press the Fn+End/Num Lock  
keys to enable the Num Lock  
function and embedded  
numeric keypad.  
---------------------------------------------------------------------------  
Keyboard is locked.  
QuickLock is  
initiated.  
Enter password to exit  
QuickLock.  
===========================================================================  
Table 5-22. Solving Trackball/Mouse Problems  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
===========================================================================  
Trackball or mouse  
does not work.  
Incorrect or no  
device driver is  
installed.  
Install the device driver  
and add to the AUTOEXEC.BAT  
file or CONFIG.SYS file.  
---------------------------------------------------  
The device driver is  
not installed in  
Windows.  
Install the Compaq mouse  
driver in Windows.  
---------------------------------------------------------------------------  
Integrated trackball  
does not work.  
An external pointing  
device is connected  
to the computer and  
the system has  
Disconnect the external  
pointing device and restart  
the computer.  
disabled the  
integrated trackball.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
---------------------------------------------------------------------------  
Trackball or mouse  
does not work even  
though the device  
driver is in the  
Mouse device driver  
is not activated  
(loaded into memory)  
in MS-DOS.  
Enter MOUSE at the system  
prompt to activate the  
mouse device driver.  
PATH command of the  
AUTOEXEC.BAT file.  
Add a line in the  
AUTOEXEC.BAT file to  
automatically activate  
the mouse device  
driver each time the  
computer is turned  
on or restarted.  
---------------------------------------------------  
Defective trackball  
assembly.  
Replace the trackball  
assembly.  
---------------------------------------------------  
Defective system  
board.  
Replace the system board.  
---------------------------------------------------  
Mouse device driver  
is not correctly  
installed in Windows.  
From Windows, run Windows  
Setup and select the proper  
mouse driver.  
---------------------------------------------------------------------------  
Cursor skips or moves  
abnormally when using  
a trackball or mouse.  
The ball, rollers, or  
tracking post in the  
trackball or mouse  
need cleaning.  
Clean the ball in the  
trackball or mouse.  
---------------------------------------------------  
Defective trackball  
assembly.  
Replace trackball assembly.  
===========================================================================  
Table 5-23. Solving Memory Problems  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
===========================================================================  
Memory count during  
Power-On Self-Test  
(POST) is incorrect.  
Optional memory  
board is installed  
incorrectly, is  
incompatible with the  
computer, or is con-  
figured incorrectly.  
1. Ensure that the  
appropriate memory board  
has been installed  
correctly.  
2. Run Computer Setup  
---------------------------------------------------------------------------  
"Out of Memory"  
Too many TSRs are  
installed.  
---------------------------------------------------  
Memory configuration  
is not set up  
correctly.  
Delete any TSR applications  
that you do not need.  
message is displayed  
on the screen or  
insufficient memory  
error occurs during  
operation.  
Reconfigure the memory  
using MS-DOS MEMMAKER.  
---------------------------------------------------  
System ran out of  
memory for the  
application.  
1. Check the application  
documentation for memory  
requirements.  
2.Increase memory.  
===========================================================================  
Table 5-24. Solving PC Card Problems  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
===========================================================================  
Download from Www.Somanuals.com. All Manuals Search And Download.  
When turned on, the  
computer does not  
beep when a PC Card  
is inserted.  
Card is not inserted  
properly.  
Remove and reinsert the  
card in the correct  
orientation.  
---------------------------------------------------  
PC Card beeps are  
disabled.  
From MS-DOS: Run the PCCARD  
utility to re-enable PC  
Card beeps. From Windows:  
Select Computer Setup from  
the Compaq Control Center  
and select the PC Card  
option to re-enable PC Card  
beeps.  
---------------------------------------------------  
Warning beeps are  
turned off.  
Press Fn+F5 keys to turn on  
warning beeps.  
---------------------------------------------------  
PC Card drivers are  
not loaded.  
Select Computer Setup from  
the Compaq Control Center  
and select the PC Card  
option to enable the PC  
Card drivers.  
---------------------------------------------------  
The PC Card slot is  
disabled.  
From MS-DOS: Select  
Security Management from  
the Configuration and  
Diagnostics menu to enable  
the PC Card slot.  
Card or card driver  
is not PC Card  
compliant.  
From Windows: Select  
Security Management from  
the Compaq Control Center  
to enable the PC Card slot.  
Contact Compaq Reseller  
Support for a list of PC  
Cards tested successfully  
in Compaq PC Card  
platforms.  
---------------------------------------------------------------------------  
The PC Card drivers  
(Socket Services,  
Card Services, Card  
ID) fail with error  
messages when the  
computer is turned  
on.  
The PC Card slot is  
disabled.  
From MS-DOS: Select  
Security Management from  
the Configuration and  
Diagnostics menu to  
enable the PC Card slot.  
From Windows: Select  
Security Management from  
the Compaq Control  
Center to enable the PC  
Card slot.  
---------------------------------------------------------------------------  
Problem Probable Cause Solution(s)  
---------------------------------------------------------------------------  
PC Card modem or  
fax card does not  
work.  
Wrong COM port  
being used to access  
the card.  
From MS-DOS: Run CARDINFO  
to determine which COM port  
is assigned to the card.  
From Windows: Select  
Computer Setup from the  
Compaq Control Center to  
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determine which COM port  
is assigned to the card.  
---------------------------------------------------  
The card conflicts  
with the system board  
serial device.  
From MS-DOS: Run PCCARD to  
select a different COM  
port for the PC Card.  
From Windows: Select  
Computer Setup from the  
Compaq Control Center, then  
select the PC Card option  
and choose a different COM  
port for the PC Card.  
---------------------------------------------------  
The card is not PC  
Card compliant.  
Contact Compaq Reseller  
Support for a list of PC  
Cards tested successfully  
in Compaq PC Card  
platforms.  
---------------------------------------------------------------------------  
Modem or network PC  
Card does not work.  
Network driver is not  
set up properly.  
Select Computer Setup  
from the Compaq Control  
Center and select the  
PC Card option; then  
view the Online help  
for detailed  
instructions on setting  
up network PC Cards.  
---------------------------------------------------------------------------  
Storage PC Card does  
not work.  
SRAM and flash  
memory cards require  
the memory card  
Select Computer Setup from  
the Compaq Control Center;  
then select the PC Card  
option to enable the  
driver to be loaded.  
memory card driver.  
---------------------------------------------------  
Flash memory cards  
require the Microsoft  
FlashFile System to  
be loaded.  
Select Computer Setup from  
the Compaq Control Center;  
then select the PC Card  
option to enable the flash  
file system.  
---------------------------------------------------  
Hard disks on flash  
mass storage cards  
require the PC Card  
ATA driver to be  
loaded.  
Select Computer Setup from  
the Compaq Control Center;  
then select the PC Card  
option to enable the PC  
Card ATA driver.  
---------------------------------------------------------------------------  
Problem Probable Cause Solution(s)  
---------------------------------------------------------------------------  
You are trying to  
access the card using  
the wrong drive  
letter.  
From MS-DOS: Run CARDINFO  
to determine which drive  
letter is assigned to the  
card.  
From Windows: Select  
Computer Setup from the  
Compaq Control Center  
to see which drive  
letter is assigned to  
the card.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
--------------------------------------------------  
The card is not  
formatted.  
From MS-DOS: For memory  
cards, run MEMCARD to  
format the card. For  
hard drive cards and  
flash mass storage  
cards, run ATACARD,  
then run FORMAT.  
From Windows: Select  
Computer Setup from the  
Compaq Control Center,  
then select MEMCARD or  
ATACARD from the PC Card  
option.  
-------------------------------------------------  
The card is not  
supported.  
Contact Compaq Reseller  
Support for a list of PC  
Cards tested successfully  
in Compaq PC Card  
platforms.  
===========================================================================  
Table 5-25. Solving Printer Problems *  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
===========================================================================  
Printer does not  
print.  
The device drivers  
for the application  
are not installed.  
Install the correct printer  
drivers for the application  
to the CONFIG.SYS file.  
---------------------------------------------------  
Printer that is set  
up for a network is  
not connected to the  
network.  
Connect the printer to the  
network.  
---------------------------------------------------  
Printer cable is too  
long, unshielded, or  
defective.  
Replace the cable.  
---------------------------------------------------------------------------  
Printer is off-line.  
Paper tray is empty.  
Fill the paper tray and  
select Online.  
---------------------------------------------------------------------------  
Printer prints  
garbled information.  
Correct printer  
drivers are not  
installed.  
Install the correct printer  
driver.  
---------------------------------------------------  
Cable is not  
Connect printer cable  
connected properly to  
computer.  
properly to the computer.  
---------------------------------------------------  
Printer cable is too  
long, unshielded, or  
defective.  
Replace the cable.  
---------------------------------------------------------------------------  
* If you experience problems printing, run a printer self-test to  
determine if it is a printer-specific problem. Refer to the  
documentation provided with the printer and the application software.  
===========================================================================  
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Table 5-26. Solving Software Application Problems  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
===========================================================================  
Cannot use an  
application.  
The application has  
not been added to the  
PATH statement.  
1. Add or edit the  
application entry in the  
AUTOEXEC.BAT file.  
2. Run the program with the  
full path name.  
---------------------------------------------------------------------------  
Application fails or  
does not work  
properly.  
A conflict exists  
between applications.  
Close all applications  
being used.  
---------------------------------------------------------------------------  
Insufficient memory  
to run application.  
Too many TSRs are  
installed.  
Delete any TSR applications  
that are not needed.  
---------------------------------------------------  
Application requires  
Windows to be run in  
enhanced mode.  
Exit Windows and enter  
again using the following  
command to run in enhanced  
mode: WIN/3  
---------------------------------------------------  
Memory configuration  
is not set up  
Re configure the memory  
using MS-DOS MEMMAKER.  
correctly.  
1. Check the application  
documentation for  
memory requirements.  
2. Install additional  
memory.  
System ran out of  
memory for the  
application.  
===========================================================================  
Table 5-27. Solving Sound Problems  
===========================================================================  
Problem  
Probable Cause  
Solution(s)  
===========================================================================  
Computer does not  
beep after the  
Power-On Self-Test  
(POST).  
Beeps have been  
turned off.  
Press the Fn+F5 keys to  
turn the speaker on.  
===========================================================================  
Chapter 5.4 Contacting Compaq Support  
Obtain the following information before contacting Compaq Support:  
o Product name  
o Product serial number (Section 1.2)  
o Purchase date  
o Conditions under which the problem occurred  
o Any error messages that have occurred  
o Hardware configuration  
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o Type of printer connected  
o Hardware/software being used  
o Printed results of Computer Checkup (TEST) and View System Information  
(INSPECT), if possible  
o Printed copies of CONFIG.SYS and AUTOEXEC.BAT files, if possible  
Chapter 5.5 Shipping Preparation  
To ship the computer, complete the following steps:  
1. Back up the critical hard drive files. Ensure that backup  
tapes/diskettes are not exposed to electrical or magnetic fields while  
stored or in transit.  
2. Turn off the computer and external devices.  
3. Disconnect the external devices from their power sources, then from the  
computer.  
IMPORTANT: Ensure that there is no diskette in the diskette drive and  
that there are no PC Cards in the PC Card slot.  
4. Close the display and all exterior doors (external options, PC Card  
compartment, memory, and hard drive).  
5. Pack the computer system with sufficient packing material to protect  
it. Use the original packing box or similar packaging.  
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Chapter 6. Specifications  
Introduction  
This chapter provides physical, environmental, and performance  
specifications for the computer and its subassemblies including the  
following:  
o Monochrome STN display  
o Color STN and TFT displays  
o Hard drives  
o Diskette drive  
o NiMH battery pack  
o AC Adapter  
o Docking Base  
Chapter 6.1 Computer  
Table 6-1. Computers Models 400 and 410  
===========================================================================  
English  
Metric  
===========================================================================  
Dimensions Online  
Monochrome (9.5 inch):  
Height  
Width  
Depth  
Weight (w/o battery)  
Weight (with battery)  
1.8 in  
11.9 in  
8.9 in  
5.6 lbs  
5.95 lbs  
4.57 cm  
30.20 cm  
22.70 cm  
2.53 kg  
2.69 kg  
Color STN (9.5 inch):  
Height  
8.9 in  
11.9 in  
2.0 in  
5.9 lbs  
6.25 lbs  
22.70 cm  
30.20 cm  
5.08 cm  
2.67 kg  
2.83 kg  
Width  
Depth  
Weight (w/o battery)  
Weight (with battery)  
Color TFT (8.4 inch):  
Height  
8.9 in  
11.9 in  
2.0 in  
5.9 lbs  
6.25 lbs  
22.70 cm  
30.20 cm  
5.08 cm  
2.67 kg  
2.83 kg  
Width  
Depth  
Weight (w/o battery)  
Weight (with battery)  
---------------------------------------------------------------------------  
Stand-alone (Battery)  
Power Requirements:  
Nominal Operating Voltage  
Nominal Operating  
Peak Operating  
10.8  
11.0 W  
24.0 W  
V
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---------------------------------------------------------------------------  
Environmental Requirements  
Temperature:  
Operating  
Nonoperating  
50oF to 104oF  
-4oF to 140oF  
10oC to 40oC  
-20oC to 60oC  
Relative Humidity:  
(noncondensing)  
Operating  
10% to 90%  
5% to 95%  
Nonoperating  
Maximum Altitude:  
(nonpressurized)  
Operating  
10,000 ft  
30,000 ft  
3658 m  
12192 m  
Nonoperating  
---------------------------------------------------------------------------  
Shock and Vibration  
Shock:  
Operating  
Nonoperating  
10 g, 11 ms, half sine  
60 g, 11 ms, half sine  
Vibration:  
Operating  
0.25 g, 5-500 Hz 1/2 octave/min  
sweep, 1 hour duration  
Nonoperating  
1.00 g, 5-500 Hz 1/2 octave/min  
sweep, 1 hour duration  
===========================================================================  
Table 6-2. Computers Models 420 and 430  
===========================================================================  
English  
Metric  
===========================================================================  
Dimensions (display size)  
Color STN (10.4 inch):  
Height  
Width  
Depth  
Weight (w/o battery)  
Weight (with battery)  
2.20 in  
11.90 in  
8.90 in  
5.9 lbs  
6.25 lbs  
5.49 cm  
30.29 cm  
22.83 cm  
2.67 kg  
2.83 kg  
Color TFT (10.4 inch):  
Height  
2.20 in  
11.90 in  
8.90 in  
5.9 lbs  
6.25 lbs  
5.49 cm  
30.29 cm  
22.83 cm  
2.67 kg  
2.83 kg  
Width  
Depth  
Weight (w/o battery)  
Weight (with battery)  
---------------------------------------------------------------------------  
Stand-alone (Battery)  
Power Requirements:  
Nominal Operating Voltage  
Nominal Operating  
Peak Operating  
10.8 V  
11.0 W  
24.0 W  
---------------------------------------------------------------------------  
Environmental Requirements  
Temperature:  
Operating  
Nonoperating  
50oF to 95oF  
-4oF to 140oF  
10oC to 35oC  
-20oC to 60oC  
Relative Humidity  
(noncondensing):  
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Operating  
Nonoperating  
10% to 90%  
5% to 95%  
Maximum Altitude  
(unpressurized):  
Operating  
10,000 ft  
30,000 ft  
3658 m  
12192 m  
Nonoperating  
---------------------------------------------------------------------------  
Shock and Vibration  
Shock:  
Operating  
Nonoperating  
Vibration:  
Operating  
10 g, 11 ms, half sine  
60 g, 11 ms, half sine  
0.25 g, 5-500 Hz 1/2 octave/min  
sweep, 1 hour duration  
Nonoperating  
1.00 g, 5-500 Hz 1/2 octave/min  
sweep, 1 hour duration  
===========================================================================  
Chapter 6.2 Displays  
Table 6-3. Monochrome (9.5 inch) Display Models 400 and 410  
===========================================================================  
English  
Metric  
===========================================================================  
Dimensions (display size):  
Height  
Width  
5.7 in  
7.6 in  
14.4 cm  
19.2 cm  
---------------------------------------------------------------------------  
Mounting Internal  
---------------------------------------------------------------------------  
Gray Scales 16 shades  
---------------------------------------------------------------------------  
Contrast Ratio 18:1  
---------------------------------------------------------------------------  
Brightness 70 CD/MU2  
---------------------------------------------------------------------------  
Pixel Size:  
Pitch  
Format  
0.3 x 0.3 mm  
640 x 480  
---------------------------------------------------------------------------  
Backlight  
CCFT-Edgelit at the  
Top and Bottom  
---------------------------------------------------------------------------  
Character Display 80 x 25  
---------------------------------------------------------------------------  
Total Power Consumption 3.0 W  
---------------------------------------------------------------------------  
Frequency:  
Horizontal  
31.2 kHz (CRT mode)  
32 kHz (LCD mode)  
Vertical  
60 Hz (VGA) 70 Hz (CGA)  
---------------------------------------------------------------------------  
Display Inverter Board:  
Input Voltage  
Output Voltage  
+5 Vdc, +18 Vdc  
340 Vac  
Maximum Input Power  
Maximum Output Power  
2.0 W  
1.4 W  
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===========================================================================  
Table 6-4. Color STN (9.5 inch) Display Models 400 and 410  
===========================================================================  
English  
Metric  
===========================================================================  
Dimensions (display size):  
Height  
Width  
5.7 in  
7.6 in  
14.4 cm  
19.2 cm  
---------------------------------------------------------------------------  
Mounting Internal  
---------------------------------------------------------------------------  
Number of Colors 256 Colors  
---------------------------------------------------------------------------  
Color Palette 4096  
---------------------------------------------------------------------------  
Contrast Ratio 18:1  
---------------------------------------------------------------------------  
Brightness 70 CD/MU2  
---------------------------------------------------------------------------  
Pixel Size:  
Pitch  
Format  
0.3 x 0.3 mm  
640 x 480  
Configuration  
RGB Stripe  
---------------------------------------------------------------------------  
Backlight CCFT-Edgelit at Top  
---------------------------------------------------------------------------  
Character Display 80 x 25  
---------------------------------------------------------------------------  
Total Power Consumption 4 W  
---------------------------------------------------------------------------  
Frequency:  
Horizontal  
31.2 kHz (CRT mode)  
32 kHz (LCD mode)  
Vertical  
60 Hz (VGA) 70 Hz (CGA)  
---------------------------------------------------------------------------  
Display Inverter Board:  
Input Voltage  
Output Voltage  
+5 Vdc, +18 Vdc  
500 Vac  
Maximum Input Power  
Maximum Output Power  
3.5 W  
2.5 W  
===========================================================================  
Table 6-5. Color TFT (8.4 inch) Display Models 400 and 410  
===========================================================================  
English  
Metric  
===========================================================================  
Dimensions (Display Size):  
Height  
Width  
5.1 in  
6.7 in  
12.9 cm  
17.1 cm  
---------------------------------------------------------------------------  
Mounting Internal  
---------------------------------------------------------------------------  
Number of Colors 256 Colors  
---------------------------------------------------------------------------  
Color Palette 27000  
---------------------------------------------------------------------------  
Contrast Ratio 100:1  
---------------------------------------------------------------------------  
Brightness  
70 CD/MU2  
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---------------------------------------------------------------------------  
Pixel Size:  
Pitch  
Format  
0.27 x 0.27 mm  
640 x 480  
Configuration  
RGB Stripe  
---------------------------------------------------------------------------  
Backlight CCFT-Edgelit at Top  
---------------------------------------------------------------------------  
Character Display 80 x 25  
---------------------------------------------------------------------------  
Total Power Consumption 4 W  
---------------------------------------------------------------------------  
Frequency:  
Horizontal  
31.2 kHz (CRT mode)  
32 kHz (LCD mode)  
Vertical  
60 Hz (VGA) 70 Hz (CGA)  
---------------------------------------------------------------------------  
Display Inverter Board:  
Input Voltage  
Output Voltage  
+5 Vdc, +18 Vdc  
500 Vac  
Maximum Input Power  
Maximum Output Power  
3.5 W  
2.5 W  
===========================================================================  
Table 6-6. Color STN (10.4 inch) Display Models 420 and 430  
===========================================================================  
English  
Metric  
===========================================================================  
Dimensions (Display Size):  
Height  
Width  
6.33 in  
8.43 in  
16.08 cm  
21.41 cm  
---------------------------------------------------------------------------  
Mounting Internal  
---------------------------------------------------------------------------  
Number of Colors 256 Colors in 640 x 480 resolution  
---------------------------------------------------------------------------  
Color Palette 4096  
---------------------------------------------------------------------------  
Contrast Ratio 20:1  
---------------------------------------------------------------------------  
Brightness 70 CD/MU2  
---------------------------------------------------------------------------  
Pixel Size:  
Pitch  
640 x 480  
0.33 mm  
Format  
Configuration  
RGB Stripe  
Stripe  
---------------------------------------------------------------------------  
Backlight CCFT-Edge light  
---------------------------------------------------------------------------  
Character Display 80 x 25  
---------------------------------------------------------------------------  
Total Power Consumption 4.0 Watts (Max)  
---------------------------------------------------------------------------  
Frequency:  
Horizontal  
31.2 kHz (CRT mode)  
32 kHz (LCD mode)  
Vertical  
60 Hz (VGA) 70 Hz (CGA)  
---------------------------------------------------------------------------  
Display Inverter Board:  
Input Voltage  
+5 Vdc, +18 Vdc  
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Output Voltage  
Maximum Input Power  
Maximum Output Power  
500 Vac  
3.5 W  
2.5 W  
===========================================================================  
Table 6-7 Color TFT (10.4 inch) Display Models 420 and 430  
===========================================================================  
English  
Metric  
===========================================================================  
Dimensions (display size):  
Height  
Width  
6.335 in  
8.365 in  
16.09 cm  
21.25 cm  
---------------------------------------------------------------------------  
Mounting Internal  
---------------------------------------------------------------------------  
Number of Colors 256 in 640 x 480 resolution  
---------------------------------------------------------------------------  
Color Palette 256 K  
---------------------------------------------------------------------------  
Contrast Ratio 100:1  
---------------------------------------------------------------------------  
Brightness 70 CD/MU2  
---------------------------------------------------------------------------  
Pixel Size:  
Pitch  
640 x 480  
0.33 mm  
Format  
Configuration  
RGB Stripe  
Stripe  
---------------------------------------------------------------------------  
Backlight CCFT-Edge light  
---------------------------------------------------------------------------  
Character Display 80 x 25  
---------------------------------------------------------------------------  
Total Power Consumption 4 Watts (Max)  
---------------------------------------------------------------------------  
Frequency:  
Horizontal  
31.2 kHz (CRT mode)  
32.0 kHz (LCD mode)  
60 Hz (VGA) 70 Hz  
(CGA)  
Vertical  
---------------------------------------------------------------------------  
Display Inverter Board:  
Input Voltage  
Output Voltage  
+5 Vdc, +18 Vdc  
500 Vac  
Maximum Input Power  
Maximum Output Power  
3.5 W  
2.5 W  
===========================================================================  
Chapter 6.3 Hard Drives  
Table 6-8a. Hard Drives  
===========================================================================  
Model  
170 MB  
250 MB  
350 MB  
===========================================================================  
Formatted Capacity  
Per Drive (MB):  
Physical  
Logical  
170.9  
170.0  
256.0  
256.0  
351.9  
351.9  
---------------------------------------------------------------------------  
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Drive Type  
65 (soft)  
65 (soft)  
65 (soft)  
---------------------------------------------------------------------------  
Drive Height:  
With drive frame  
12.7 mm  
12.7 mm  
12.7mm  
---------------------------------------------------------------------------  
Drive Size:  
Inches  
Centimeters  
2.5 x 0.5  
6.3 x 1.3  
2.5 x 0.5  
6.3 x 1.3  
2.5 x 0.5  
6.3 x1.3  
---------------------------------------------------------------------------  
Transfer Rate:  
Media (Mb/s)  
Interface (MB/s)  
21.07 to 35.9  
4.0  
21.07 to 35.9  
4.0  
26.9 to 39.5  
11.1  
---------------------------------------------------------------------------  
Sector Interleave 1:1 1:1 1:1  
---------------------------------------------------------------------------  
Typical Seek Time  
(including settling):  
Single Track (ms)  
Average (ms)  
Full Stroke (ms)  
5.0  
17.0  
24.0  
5.0  
17.0  
24.0  
4.0  
14.0  
24.0  
---------------------------------------------------------------------------  
Disk Rotational  
Speed  
4500 rpm  
4500 rpm  
4000 rpm  
---------------------------------------------------------------------------  
Physical  
Configuration:  
Cylinders  
Data Heads  
1704  
4
1704  
4
3477  
2
Sectors/Track  
Bytes/Sector  
54 to 92  
512  
54 to 92  
512  
80 to 120  
512  
---------------------------------------------------------------------------  
Logical  
Configuration:  
Cylinders  
Data Heads  
538  
10  
723  
11  
682  
16  
Sectors/Track  
Bytes/Sector  
16  
512  
63  
512  
63  
512  
---------------------------------------------------------------------------  
Buffer Size (KB) 96 96 64  
===========================================================================  
Table 6-8b. Hard Drives  
===========================================================================  
Model  
420 MB  
540 MB  
720 MB  
===========================================================================  
Formatted Capacity  
Per Drive (MB):  
Physical  
Logical  
421.1  
421.1  
541.9  
541.9  
722.5  
722.5  
---------------------------------------------------------------------------  
Drive Type 65 (soft) 65 (soft) 65 (soft)  
---------------------------------------------------------------------------  
Drive Height:  
With drive frame  
12.7 mm  
12.7 mm  
12.7 mm  
---------------------------------------------------------------------------  
Drive Size:  
Inches  
Centimeters  
2.5 x 0.5  
6.3 x 1.3  
2.5 x 0.5  
6.3 x 1.3  
2.5 x 0.5  
6.3 x 1.3  
---------------------------------------------------------------------------  
Transfer Rate:  
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Media (Mb/s)  
Interface (MB/s)  
19 to 33  
11.1  
26.9 to 39.5  
11.1  
26.9 to 39.5  
11.1  
---------------------------------------------------------------------------  
Sector Interleave 1:1 1:1 1:1  
---------------------------------------------------------------------------  
Typical Seek Time  
(including settling):  
Single Track (ms)  
Average (ms)  
Full Stroke (ms)  
3.0  
13.0  
21.0  
4.0  
14.0  
24.0  
4.0  
14.0  
24.0  
---------------------------------------------------------------------------  
Disk Rotational  
Speed  
3600 rpm  
4000 rpm  
4000 rpm  
---------------------------------------------------------------------------  
Physical  
Configuration:  
Cylinders  
2393  
3477  
3477  
Data Heads  
4
3
4
Sectors/Track  
Bytes/Sector  
60 to 107  
512  
80 to 120  
512  
80 to 120  
512  
---------------------------------------------------------------------------  
Logical  
Configuration:  
Cylinders  
Data Heads  
816  
16  
1050  
16  
1400  
16  
Sectors/Track  
Bytes/Sector  
63  
512  
63  
512  
63  
512  
---------------------------------------------------------------------------  
Buffer Size (KB) 64 64 64  
===========================================================================  
Chapter 6.4 Diskette Drive  
Table 6-9. Diskette Drive (All Models)  
===========================================================================  
Diskettes:  
Size  
3.5 in (8.8 cm)  
High Density (MB)  
Low Density (KB)  
1.44  
720  
---------------------------------------------------------------------------  
LED Indicator Green  
---------------------------------------------------------------------------  
Height One-third  
---------------------------------------------------------------------------  
Sectors per Track:  
High Density  
Low Density  
18  
9
---------------------------------------------------------------------------  
Tracks per Side:  
High Density  
Low Density  
80  
80  
---------------------------------------------------------------------------  
Transfer Rate:  
Media (Mb/s)  
Interface (MB/s)  
---------------------------------------------------------------------------  
Cylinder:  
High  
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Low  
---------------------------------------------------------------------------  
Rotational Speed  
---------------------------------------------------------------------------  
Read/Write Heads  
300 rpm  
2
---------------------------------------------------------------------------  
Average Access Time (ms):  
Track-to-Track (high/low)  
Average (high/low)  
Settling Time (ms)  
3/3  
94/94  
15  
Latency Average (ms)  
100  
===========================================================================  
Chapter 6.5 Nickel Metal Hydride (NiMH) Battery Pack  
Table 6-10. Battery Pack (All Models)  
===========================================================================  
English  
Metric  
===========================================================================  
Dimensions:  
Height  
Length  
Width  
0.7 in  
8.2 in  
2.0 in  
1.8 cm  
20.8 cm  
5.2 cm  
---------------------------------------------------------------------------  
Weight 1.0 lb 0.4 kg  
---------------------------------------------------------------------------  
Energy:  
Rated Capacity  
Nominal Open Circuit Volt.  
Rated Capacity  
10.8 V dc  
12.0 V dc  
2.4 Ah  
Standard Recharge Rate  
15 W Max.  
7 W Min.  
---------------------------------------------------------------------------  
Battery Life * 4 to 6 h  
---------------------------------------------------------------------------  
Environmental Requirements  
Temperature:  
Operating  
50oF to 104oF  
10oC to 40oC  
Storage  
No time limit  
No longer than 3 months  
No longer than 1 month  
-4oF to 86oF  
-4oF to 104oF  
-4oF to 122oF  
-20oC to 30oC  
-20oC to 40oC  
-20oC to 50oC  
---------------------------------------------------------------------------  
* Battery life is based on an estimated typical use pattern of an average  
user and will vary based on the configuration of the computer and the  
usage pattern of the individual user. To maximize battery life, Compaq  
recommends that power conservation be set to high.  
===========================================================================  
Chapter 6.6 AC Adapter  
Table 6-11. AC Adapter (All Models)  
===========================================================================  
English  
Metric  
===========================================================================  
Dimensions:  
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Height  
Depth  
Width  
1.3 in  
3.0 in  
5.0 in  
3.3 cm  
7.6 cm  
12.7 cm  
---------------------------------------------------------------------------  
Weight (without cords) 6 oz 0.227 kg  
---------------------------------------------------------------------------  
Power Supply Ratings:  
Voltage Range  
100-120  
100-120  
220-240 V  
0.8A/0.4 A  
50 - 60 Hz  
16.5 V dc  
2.6 A  
220-240 V  
0.8A/0.4 A  
50 - 60 Hz  
16.5 V dc  
2.6 A  
Input Current  
Input Frequency  
Maximum Output Voltage  
Maximum Output Current  
Maximum Output Power  
Maximum Transient  
27 W  
1 kV for 50 nx  
27 W  
1 kV for 50 nx  
---------------------------------------------------------------------------  
Minimum Charge Time 1.0 hr 1.0 hr  
===========================================================================  
Chapter 6.7 Docking Base  
Table 6-12. Docking Base (All Models)  
===========================================================================  
Without Monitor  
Support Cover  
With Monitor  
Support Cover  
===========================================================================  
Dimensions:  
Height  
Width  
Depth  
2.75 in (7 cm)  
15.75 in (30 cm)  
11.75 in (40 cm)  
3.875 in (10 cm)  
17.5 in (34 cm)  
13.5 in (44 cm)  
---------------------------------------------------------------------------  
Weight 59.13 oz (1.7 kg) 130.86 oz (3.7 kg)  
---------------------------------------------------------------------------  
Power Supply:  
Input Voltage  
Input Power  
18.5 Vdc Maximum  
27 W Maximum  
---------------------------------------------------------------------------  
Environmental Requirements  
Temperature:  
Operating  
Nonoperating  
50oF to 104oF  
-7.6oF to 140oF  
10oC to 40oC  
-20oC to 60oC  
Relative Humidity:  
Operating  
10% to 90%, noncondensing  
5% to 95%, noncondensing  
Nonoperating  
---------------------------------------------------------------------------  
Shock and Vibration  
Shock:  
Operating  
Nonoperating  
10 g, 11 ms, half sine  
60 g, 11 ms, half sine  
Vibration:  
Operating  
0.25 g, 5-500 Hz/octave/min sweep  
1.00 g, 5-500 Hz/octave/min sweep  
Nonoperating  
---------------------------------------------------------------------------  
Maximum  
Unpressurized  
Altitude:  
Operating  
Nonoperating  
10,000 ft  
40,000 ft  
3658 m  
15750 m  
===========================================================================  
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