Compaq Personal Computer EX Series User Manual
Maintenance &  
Service Guide  
Compaq Deskpro EX and Deskpro EXS  
Series of Personal Computers  
Minitower Models  
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Notice  
© 2000 Compaq Computer Corporation. Except for use in connection with the accompanying Compaq product, no part of  
this guide may be photocopied or reproduced in any form without prior written consent from Compaq Computer  
Corporation.  
COMPAQ, the Compaq logo, and Deskpro Registered in U.S. Patent and Trademark Office are trademarks of Compaq  
Information Technologies Group, L.P.  
Microsoft, Windows, Windows NT, and other names of Microsoft products referenced herein are trademarks or registered  
trademarks of Microsoft Corporation.  
Intel and Pentium are registered trademarks of Intel Corporation. Celeron and MMX are trademarks of Intel Corporation.  
All other product names mentioned herein may be trademarks or registered trademarks of their respective companies.  
Compaq shall not be liable for technical or editorial errors or omissions contained herein. The information in this document  
is subject to change without notice.  
THE INFORMATION IN THIS PUBLICATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND.  
THE ENTIRE RISK ARISING OUT OF THE USE OF THIS INFORMATION REMAINS WITH RECIPIENT. IN NO  
EVENT SHALL COMPAQ BE LIABLE FOR ANY DIRECT, CONSEQUENTIAL, INCIDENTAL, SPECIAL,  
PUNITIVE OR OTHER DAMAGES WHATSOEVER (INCLUDING WITHOUT LIMITATION, DAMAGES FOR  
LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION OR LOSS OF BUSINESS INFORMATION), EVEN IF  
COMPAQ HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND WHETHER IN AN ACTION  
OF CONTRACT OR TORT, INCLUDING NEGLIGENCE.  
The limited warranties for Compaq products are exclusively set forth in the documentation accompanying such  
products. Nothing herein should be construed as constituting a further or additional warranty.  
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  
information.  
Maintenance & Service Guide  
Compaq Deskpro EX and Deskpro EXS Series of Personal Computers  
Minitower Models  
First Edition (September 2000)  
Part Number 201856-001  
Spare Parts Number 215879-001  
Compaq Computer Corporation  
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CONTENTS  
preface  
About This Guide  
Symbols and Conventions.........................................................................................................vii  
Technician Notes.......................................................................................................................vii  
Locating Additional Information .............................................................................................viii  
chapter 1  
Product Description  
1.1 Computer Features.......................................................................................................... 1-2  
1.1.1 Front Panel Controls and LEDs ......................................................................... 1-2  
1.1.2 Rear Panel Connectors ....................................................................................... 1-3  
1.1.3 Drive Positions................................................................................................... 1-4  
1.2 Serial Number Location.................................................................................................. 1-5  
chapter 2  
Spare Parts  
2.1 System Unit .................................................................................................................... 2-2  
2.2 Mass Storage Devices..................................................................................................... 2-3  
2.3 Cables ............................................................................................................................. 2-4  
2.4 Standard, Memory, and Expansion Boards .................................................................... 2-5  
2.5 Miscellaneous Plastics Kit.............................................................................................. 2-6  
2.6 Keyboards (not illustrated) ............................................................................................. 2-7  
2.7 Miscellaneous Screw Kit (not illustrated)....................................................................... 2-7  
2.8 Miscellaneous Parts (not illustrated)............................................................................... 2-8  
2.9 Shipping Boxes (not illustrated) ..................................................................................... 2-8  
2.10 Documentation and Software (not illustrated)................................................................ 2-8  
chapter 3  
Removal and Replacement Preliminaries  
3.1 Electrostatic Discharge Information ............................................................................... 3-1  
3.1.1 Generating Static................................................................................................ 3-1  
3.1.2 Preventing Electrostatic Damage to Equipment................................................. 3-2  
3.1.3 Personal Grounding Methods and Equipment ................................................... 3-2  
3.1.4 Grounding Workstations .................................................................................... 3-2  
3.1.5 Recommended Materials and Equipment........................................................... 3-3  
3.2 Routine Care................................................................................................................... 3-3  
3.2.1 General Cleaning Safety Precautions................................................................. 3-3  
3.2.2 Cleaning the Computer Case.............................................................................. 3-4  
3.2.3 Cleaning the Keyboard....................................................................................... 3-4  
3.2.4 Cleaning the Monitor ......................................................................................... 3-4  
3.2.5 Cleaning the Mouse............................................................................................ 3-5  
Contents  
iii  
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3.3 Service Considerations ................................................................................................... 3-5  
3.3.1 Power Supply Fan .............................................................................................. 3-5  
3.3.2 Tools and Software Requirements ..................................................................... 3-5  
3.3.3 Screws ................................................................................................................ 3-5  
3.3.4 Cables and Connectors....................................................................................... 3-6  
3.3.5 Hard Drives........................................................................................................ 3-6  
3.3.6 Lithium Coin Cell Battery.................................................................................. 3-6  
chapter 4  
Removal and Replacement Procedures  
4.1 Disassembly Sequence Chart.......................................................................................... 4-1  
4.2 Disassembly Preparation................................................................................................. 4-2  
4.3 Feet Installation .............................................................................................................. 4-3  
4.4 Cable Lock...................................................................................................................... 4-4  
4.5 Access Panel................................................................................................................... 4-5  
4.6 Front Bezel ..................................................................................................................... 4-6  
4.7 Power Button .................................................................................................................. 4-7  
4.8 Subpanel and Bezel Blanks............................................................................................. 4-8  
4.9 Power Switch Assembly................................................................................................. 4-9  
4.10 Mass Storage Devices................................................................................................... 4-10  
4.10.1 Removing an Internal 3.5-Inch Hard Drive ..................................................... 4-12  
4.10.2 Removing an External 5.25-Inch Drive ........................................................... 4-13  
4.10.3 Removing an External 3.5-Inch Drive ............................................................. 4-14  
4.11 Expansion Boards......................................................................................................... 4-16  
4.11.1 Expansion Board Slots ..................................................................................... 4-16  
4.11.2 Removing a PCI Expansion Board................................................................... 4-17  
4.11.3 Installing a PCI Expansion Board .................................................................... 4-18  
4.12 System Memory............................................................................................................ 4-20  
4.13 Graphics Cards.............................................................................................................. 4-22  
4.13.1 Graphics Performance Accelerator (GPA)/AGP Inline Memory  
Module (AIMM) Card with a Type I Retention Mechanism .................................... 4-22  
4.13.2 AGP Card with a Type I Retention Mechanism............................................... 4-25  
4.13.3 GPA/AIMM Card with a Type 2 Retention Mechanism.................................. 4-26  
4.13.4 AGP Card with a Type 2 Retention Mechanism.............................................. 4-27  
4.13.5 Standard AGP Expansion Card........................................................................ 4-28  
4.14 Processor....................................................................................................................... 4-29  
4.15 System Board................................................................................................................ 4-31  
4.16 Battery .......................................................................................................................... 4-32  
4.17 Chassis Fan Assembly .................................................................................................. 4-33  
4.18 Power Supply................................................................................................................ 4-34  
chapter 5  
Connectors & Jumpers  
5.1 System Board.................................................................................................................. 5-1  
5.1.1 Connectors and Jumpers .................................................................................... 5-1  
5.1.2 Clearing CMOS.................................................................................................. 5-2  
5.1.3 Disabling or Clearing the Power-On and Setup Passwords ............................... 5-3  
5.2 Hard Drive Jumper Settings............................................................................................ 5-4  
5.2.1 Seagate, Quantum, and Western Digital ............................................................ 5-4  
5.2.2 Maxtor................................................................................................................ 5-5  
iv  
Contents  
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chapter 6  
Specifications  
6.1 Specifications.................................................................................................................. 6-1  
6.1.1 System................................................................................................................ 6-1  
6.1.2 System Interrupts ............................................................................................... 6-2  
6.1.3 System DMA...................................................................................................... 6-2  
6.1.4 ICH Fixed I/O Registers..................................................................................... 6-3  
6.1.5 System Memory Map......................................................................................... 6-5  
6.2 Drives.............................................................................................................................. 6-6  
6.2.1 1.44-MB Diskette Drive..................................................................................... 6-6  
6.2.2 Ultra ATA Hard Drives...................................................................................... 6-7  
6.2.3 CD-ROM Drives ................................................................................................ 6-8  
6.3 Compaq Keyboard.......................................................................................................... 6-9  
6.4 Scroll Mouse................................................................................................................... 6-9  
6.5 Supported Graphics Resolutions................................................................................... 6-10  
6.5.1 Intel 3D Graphics............................................................................................. 6-10  
6.5.2 nVIDIA M64 Pro ............................................................................................. 6-10  
index .............................................................................................................................................. I-1  
Contents  
v
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preface  
ABOUT THIS GUIDE  
This Maintenance & Service Guide is a troubleshooting and repair guide that can be used  
for reference when servicing the Compaq Deskpro EX Series of Personal Computers  
Minitower Model. Only authorized technicians trained by Compaq should attempt to  
repair this equipment.  
Compaq Computer Corporation reserves the right to make changes to the these models  
without notice.  
Symbols and Conventions  
The following text and symbols mark special messages throughout this guide:  
WARNING: Text set off in this manner indicates that failure to follow directions in the warning 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.  
Text set off in this manner presents commentary, sidelights, clarifying information, or  
specific instructions.  
✎
Technician Notes  
WARNING: Only authorized technicians trained by Compaq should attempt to 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 wiring board. Improper repairs  
can create a safety hazard. Any indications of component replacement or printed wiring board  
modifications may void any warranty.  
WARNING: To reduce the risk of electric shock or damage to the equipment:  
•
•
Do not disable the power grounding plug. The grounding plug is an important safety feature.  
Plug the power cord into a grounded (earthed) electrical outlet that is easily accessible at all  
times.  
•
Disconnect the power from the computer by unplugging the power cord either from the  
electrical outlet or the computer.  
CAUTION: To properly ventilate your system, you must provide at least 3 inches (7.6 cm) of  
clearance at the front and back of the computer.  
Compaq Deskpro EX and Deskpro EXS Series of Personal Computers vii  
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Locating Additional Information  
The following documentation is available to support these products:  
User Documentation  
Technical Training Guides  
✎
✎
✎
✎
✎
✎
✎
✎
Compaq Service Advisories and Bulletins  
Compaq QuickFind  
Technical Reference Guide  
Compaq Quick Reference Guide  
Compaq Service Reference Guide  
Compaq Quick Troubleshooting Guide  
viii  
About This Guide  
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chapter 1  
PRODUCT DESCRIPTION  
This chapter describes the model offerings and features of the Compaq Deskpro EX Series  
of Personal Computers Minitower Model.  
Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 1-1  
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1.1  
Computer Features  
Compaq Deskpro EX Series of Personal Computers Minitower Model ships with a mouse  
and keyboard. Some models are also equipped with a CD-ROM drive. A Compaq color  
monitor or other compatible monitor does not ship with the computer.  
1.1.1  
Front Panel Controls and LEDs  
Ref. Component/Function  
Ref. Component/Function  
Stereo Headphone Jack*  
CD-ROM Eject Button*  
1
6
Headphone Volume Control*  
CD-ROM Drive Busy Indicator*  
2
7
Diskette Drive Activity Light  
Diskette Eject Button  
3
8
Dual-State Power Button  
Drive Activity Light**  
4
9
Power-On Light  
5
*CD-ROM models only.  
**Flashes when an ATAPI device, such as the hard drive, is active.  
1-2  
Product Description  
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1.1.2  
Rear Panel Connectors  
Ref. Component  
Ref. Component  
Mouse Connector  
Monitor Connector  
1
6
7
8
Keyboard Connector  
Headphone/Line-Out Audio Connector  
Serial Connector  
2
Universal Serial Bus (USB)  
3
Connectors (2) (connects the  
computer to any USB peripheral  
while the computer is operating; is  
a fully functional plug and play  
connector)  
Serial Connector  
Line-In Audio Connector  
Microphone Connector  
4
9
:
Parallel Port Connector  
5
Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 1-3  
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1.1.3  
Drive Positions  
Reference Drive Bay  
Configuration  
1, 2  
3
Two standard 5.25-inch, half-height bays for optional drives  
1, 2  
One standard 3.5-inch, 1.44-MB diskette drive mounted with a drive  
adapter into a 5.25-inch bay  
3
4, 5  
Two standard 3.5-inch drive bays; Bay 4 contains the preinstalled hard  
drive; Bay 5 is available for an optional hard drive  
4, 5  
Drive bay numbers are stamped on the chassis.  
To verify the type and size of the mass storage devices installed in the computer, run F10  
Compaq Computer Setup.  
1-4  
Product Description  
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1.2  
Serial Number Location  
The serial number and model information label is located on the access panel of the  
unit 1. A second barcode label is located on the rear of the unit 2.  
For the purpose of AssetControl, the serial number is embedded in CMOS and in the  
EEPROM on the system board and may be accessed through Diagnostics for Windows.  
If the system board is replaced with a spare part from Compaq, the invalid serial  
number condition will be recognized during POST. The original serial number  
must then be reentered through Computer Setup. Refer to the Software Reference  
Guide for more information.  
CAUTION: A system board borrowed from another computer is recognized as a valid serial  
number and will create a mismatch between the serial number label and the electronic serial  
number.  
The computer serial number should be provided to Compaq when requesting information  
or ordering spare parts.  
Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 1-5  
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chapter 2  
SPARE PARTS  
Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 2-1  
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2.1  
System Unit  
Spare Part  
Number  
Warranty  
Tier  
Description  
1
2
3
4
5
6
7
Access panel  
Not spared  
Front bezel  
166868-001  
Not spared  
B
B
Chassis/basepan  
Logo Kit (only minitower version-166806-002-used)  
166924-001  
199854-001  
Misc Plastics Kit  
201828-001  
Power switch with cable, LED and switch holder  
Feet  
B
B
Power supply  
2-2  
Spare Parts  
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2.2  
Mass Storage Devices  
Spare Part  
Number  
Warranty  
Tier  
Description  
1
2
3
*
Diskette drive, 3.5-inch  
158266-001  
187263-001  
203139-001  
202903-001  
D
B
B
B
48X Max tray load IDE CD-ROM drive  
10.0-GB Ultra ATA hard drive (66/5400) quiet  
15.0-GB Ultra ATA hard drive (66/5400)  
*Not shown  
(nn/nnnn) = hard drive transfer rate (MBytes/sec)/RPM  
Ultra ATA/100 hard drives are backwards compatible with Ultra ATA/66  
devices; however, the data transfer rate is reduced to 66MB/sec.  
Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 2-3  
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2.3  
Cables  
Spare Part  
Number  
Warranty  
Tier  
Description  
B
Cable Kit includes:  
192264-001  
1
Single device, hard drive/CD-ROM cable, 18”  
(108950-019)  
2
*
Audio cable, 21” (387527-001)  
Single device, hard drive/CD-ROM cable, 12.5”  
(105876-001)  
*
Audio cable, 21”, (288489-002) (not used for this  
product)  
3
4
Single device, hard drive/CD-ROM cable, 9.75”  
(108950-021)  
Dual device, hard drive/CD-ROM cable, 18”, 10” to the first 196667-001  
connector  
B
5
6
*
Power switch/LED cable  
Diskette drive cable  
CD audio cable  
199854-001  
161735-001  
149806-001  
B
B
D
*Not shown  
2-4  
Spare Parts  
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2.4  
Standard, Memory, and Expansion Boards  
Spare Part  
Number  
Warranty  
Tier  
Description  
1 Nvidia M64 16MB SDRAM AGP Card  
5 AIMM (GPA) 4MB, 133MHz for graphics  
Memory Module (SDIMM, 133 MHz)  
182757-001  
192012-001  
B
B
2
128 MB  
170081-001  
192014-001  
B
B
256 MB  
Intel Pentium III Processor  
3
*
*
*
*
*
*
566/66 MHz with heatsink (191832-002) and clip (223575-007).  
600/66 MHz with heatsink (191832-002) and clip (223575-007).  
667/133 MHz with heatsink (191832-002) and clip (223575-007).  
700/66 MHz with heatsink (191832-002) and clip (223575-007).  
733/133 MHz with heatsink (191832-002) and clip (223575-007).  
800/133 MHz with heatsink (191832-002) and clip (223575-007).  
203967-001  
192011-001  
192007-001  
203968-001  
192008-001  
192009-001  
192006-001  
B
B
B
B
B
B
B
866/133 MHz with fansink (191845-002). Fansink includes fan,  
heatsink, and clip.  
*
933/133 MHz with fansink (191845-002). Fansink includes fan,  
heatsink, and clip.  
203969-001  
B
4 10/100 PCI Network Interface Card  
6 System Board  
188297-001  
203966-001  
B
B
*Not shown.  
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2.5  
Miscellaneous Plastics Kit  
Spare Part  
Number  
Warranty  
Tier  
Description  
Miscellaneous Plastics Kit, includes:  
166878-001  
B
1
2
3
4
5
6
7
8
9
Panel, sub (166835-001)  
Bezel, blank (166775-001)  
Diskette bezel (166776-001)  
Card guide (166778-001)  
Foot, rubber (4 ea.) (166939-002)  
Button, power (166774-001)  
Drivelock, DT (166779-001) (not used with this product)  
Spring, power button (166837-001)  
Springs, drivelock (2 ea.) (166837-002)  
10 Drivelock, MT (166780-001)  
Retention mechanism (2 ea.) (350767-001)  
*Not shown  
*
2-6  
Spare Parts  
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2.6  
Keyboards (not illustrated)  
Spare Part  
Number  
Warranty  
Tier  
Description  
Easy Access Keyboard-US  
123130-xxx  
-331  
D
Dutch  
Finnish  
French  
International  
Norwegian  
Spanish  
Swedish  
UK  
-351  
-051  
-B31  
-091  
-071  
-101  
-031  
US  
-001  
2.7  
Miscellaneous Screw Kit (not illustrated)  
Spare Part  
Number  
Warranty  
Tier  
Description  
Miscellaneous Screw Kit, includes:  
179180-001  
D
6-32 x 1/4 hi-top, thread-forming screw with serrations (5 ea.)  
(192308-001)  
6-19 x 5/16 panhead, plastite screw (4 ea.) (101346-068)  
6-19 x .5/16 hi-top, taptite screw with captive washer (4 ea.)  
(114399-069)  
6-32 x 3/16 hi-top, thread-forming screw with serrations (5 ea.)  
(192308-003)  
M3 x 5mm, hi-top, taptite screw with serrations (4 ea.)  
(247348-001)  
6-32 x 3/16 buttonhead tamper-resistant, taptite screw with  
serrations (3 ea.) (296769-002)  
6-32 x 5/16 hi-top, taptite screw (4 ea.) (109834-568)  
6-19 x 1/2 Panhead, plastite screw (5 ea.) (101346-071)  
Thumbscrew, molded cap (4 ea.) (179333-002)  
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2.8  
Miscellaneous Parts (not illustrated)  
Spare Part Warranty  
Description  
Number  
Tier  
Mouse – Scroll, Opal  
334689-002  
D
2.9  
Shipping Boxes (not illustrated)  
Description  
Spare Part Number  
Return Kit  
166990-002  
2.10  
Documentation and Software (not illustrated)  
Description  
Spare Part Number  
215879-001  
Maintenance & Service Guide  
Illustrated Parts Map  
215880-001  
Service Reference Guide  
Quick Troubleshooting Guide  
152611-001  
153837-001  
2-8  
Spare Parts  
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chapter 3  
REMOVAL & REPLACEMENT PRELIMINARIES  
This chapter provides general service information for the computer. Adherence to the  
procedures and precautions described in this chapter is essential for proper service.  
CAUTION: When the computer is plugged into an AC power source there is always voltage applied  
to the system board. You must disconnect the power cord from the power source before opening the  
computer to prevent system board or component damage.  
3.1  
Electrostatic Discharge Information  
A sudden discharge of static electricity from your finger or other conductor can destroy  
static-sensitive devices or microcircuitry. 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 can work perfectly throughout a normal cycle. The device 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.  
3.1.1  
Generating Static  
The following table shows that:  
!
!
Different activities generate different amounts of static electricity.  
Static electricity increases as humidity decreases.  
Relative Humidity  
Event  
55%  
40%  
10%  
Walking across carpet  
Walking across vinyl floor  
Motions of bench worker  
7,500 V  
3,000 V  
400 V  
15,000 V  
5,000 V  
800 V  
35,000 V  
12,000 V  
6,000 V  
Removing DIPs* from plastic tube  
Removing DIPs* from vinyl tray  
Removing DIPs* from Styrofoam  
400 V  
2,000 V  
3,500 V  
700 V  
4,000 V  
5,000 V  
2,000 V  
11,500 V  
14,500 V  
Removing bubble pack from PCB  
Packing PCBs in foam-lined box  
7,000 V  
5,000 V  
20,000 V  
11,000 V  
26,500 V  
21,000 V  
*Dual Inline Packaging (DIP) is the packaging around individual microcircuitry.  
These are then multi-packaged inside plastic tubes, trays, or Styrofoam.  
700 volts can degrade a product.  
✎
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3.1.2  
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 to electric components and accessories.  
!
!
!
To avoid hand contact, transport products in static-safe containers such as tubes,  
bags, or boxes.  
Protect all electrostatic parts and assemblies with conductive or approved  
containers or packaging.  
Keep electrostatic sensitive parts in their containers until they arrive at static-free  
stations.  
!
!
!
!
Place items on a grounded surface before removing them from their container.  
Always be properly grounded when touching a sensitive component or assembly.  
Avoid contact with pins, leads, or circuitry.  
Place reusable electrostatic-sensitive parts from assemblies in protective packaging  
or conductive foam.  
3.1.3  
Personal Grounding Methods and Equipment  
Use the following equipment to prevent static electricity damage to equipment:  
!
Wrist straps are flexible straps with a minimum of one-megohm +/- 10%  
resistance in the ground cords. To provide proper ground, a strap must be worn  
snug against bare skin. The ground cord must be connected and fit snugly into the  
banana plug connector on the grounding mat or workstation.  
!
Heel straps/Toe straps/Boot straps can be used at standing workstations and are  
compatible with most types of shoes or boots. On conductive floors or dissipative  
floor mats, use them on both feet with a minimum of one-megohm +/- 10%  
resistance between the operator and ground.  
Static Shielding Protection Levels  
Method  
Voltage  
Antistatic plastic  
1,500  
Carbon-loaded plastic  
Metallized laminate  
7,500  
15,000  
3.1.4  
Grounding Workstations  
To prevent static damage at the workstation, use the following precautions:  
!
Cover the workstation with approved static-dissipative material. Provide a wrist  
strap connected to the work surface and properly grounded tools and equipment.  
!
!
Use static-dissipative mats, foot straps, or air ionizers to give added protection.  
Handle electrostatic sensitive components, parts, and assemblies by the case or  
PCB laminate. Handle them only at static-free workstations.  
!
Turn off power and input signals before inserting and removing connectors or test  
equipment.  
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!
!
!
Use fixtures made of static-safe materials when fixtures must directly contact  
dissipative surfaces.  
Keep work area free of nonconductive materials such as ordinary plastic assembly  
aids and Styrofoam.  
Use field service tools, such as cutters, screwdrivers, and vacuums, that are  
conductive.  
3.1.5  
Recommended Materials and Equipment  
Materials and equipment that are recommended for use in preventing static electricity  
include:  
!
!
!
!
!
Antistatic tape  
Antistatic smocks, aprons, or sleeve protectors  
Conductive bins and other assembly or soldering aids  
Conductive foam  
Conductive tabletop workstations with ground cord of one-megohm +/- 10%  
resistance  
!
!
!
!
!
!
!
!
!
!
!
Static-dissipative table or floor mats with hard tie to ground  
Field service kits  
Static awareness labels  
Wrist straps and footwear straps providing one-megohm +/- 10% resistance  
Material handling packages  
Conductive plastic bags  
Conductive plastic tubes  
Conductive tote boxes  
Opaque shielding bags  
Transparent metallized shielding bags  
Transparent shielding tubes  
3.2  
Routine Care  
3.2.1  
General Cleaning Safety Precautions  
1. Never use solvents or flammable solutions to clean the computer.  
2. Never immerse any parts in water or cleaning solutions; apply any liquids to a clean  
cloth and then use the cloth on the component.  
3. Always turn off the computer when cleaning with liquids or damp cloths.  
4. Always turn off the computer before cleaning the keyboard, mouse, or air vents.  
5. Disconnect the keyboard before cleaning it.  
6. Wear safety glasses equipped with side shields when cleaning the keyboard.  
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3.2.2  
Cleaning the Computer Case  
Follow all safety precautions in Section 3.2.1 before cleaning the computer.  
To clean the computer case, follow the procedures described below:  
!
!
To remove light stains or dirt, use plain water with a clean, lint-free cloth or swab.  
For stronger stains, use a mild dishwashing liquid diluted with water. Rinse well  
by wiping it with a cloth or swab dampened with clear water.  
!
For stubborn stains, use isopropyl (rubbing) alcohol. No rinsing is needed as the  
alcohol will evaporate quickly and not leave a residue.  
!
!
After cleaning, always wipe the unit with a clean, lint-free cloth.  
Occasionally clean the air vents on the computer. Lint and other foreign matter can  
block the vents and limit the airflow.  
3.2.3  
Cleaning the Keyboard  
Follow all safety precautions in Section 3.2.1 before cleaning the keyboard.  
To clean the tops of the keys or the keyboard body, follow the procedures described in  
Section 3.2.2.  
When cleaning debris from under the keys, review all rules in Section 3.2.1 before  
following these procedures:  
CAUTION: Use safety glasses equipped with side shields before attempting to clean debris from  
under the keys.  
!
!
Visible debris underneath or between the keys may be removed by vacuuming or  
shaking.  
Canned, pressurized air may be used to clean debris from under the keys. Caution  
should be used as too much air pressure can dislodge lubricants applied under the  
wide keys.  
!
!
If you remove a key, use a specially designed key puller to prevent damage to the  
keys. This tool is available through many electronic supply outlets.  
CAUTION: Never remove a wide leveled key (like the space bar) from the keyboard. If these keys are  
improperly removed or installed, the keyboard may not function properly.  
Cleaning under a key may be done with a swab moistened with isopropyl alcohol  
and squeezed out. Be careful not to wipe away lubricants necessary for proper key  
functions. Use tweezers to remove any fibers or dirt in confined areas. Allow the  
parts to air dry before reassembly.  
3.2.4  
Cleaning the Monitor  
!
Wipe the monitor screen with a clean cloth moistened with water or with a  
towelette designed for cleaning monitors. Do not use sprays or aerosols directly on  
the screen, the liquid may seep into the housing and damage a component. Never  
use solvents or flammable liquids on the monitor.  
!
To clean the monitor body follow the procedures in Section 3.2.2.  
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3.2.5  
Cleaning the Mouse  
Before cleaning the mouse, ensure that the power to the computer is turned off.  
!
Clean the mouse ball by first removing the retaining plate and the ball from the  
housing. Pull out any debris from the ball socket and wipe the ball with a clean dry  
cloth before reassembly.  
!
To clean the mouse body, follow the procedures in 3.2.2.  
3.3  
Service Considerations  
Listed below are some of the considerations that you should keep in mind during the  
disassembly and assembly of the computer.  
3.3.1  
Power Supply Fan  
The power supply fan is a variable-speed fan based on the temperature in the power  
supply.  
CAUTION: The cooling fan is off only when the computer is turned off or the power cable has been  
disconnected.  
The cooling fan is always on in all other instances (when the computer is either in the “On,” “Standby,”  
or “Suspend” mode).  
You must disconnect the power cord from the power source before opening the computer to prevent  
system board or component damage.  
3.3.2  
3.3.3  
Tools and Software Requirements  
To service the computer, you need the following:  
!
!
!
!
Torx T-15 screwdriver (Compaq screwdriver with bits PN 161946-001)  
Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver)  
Diagnostics software  
Compaq tamper-resistant T-15 wrench (Smart Cover FailSafe Key, PN 166527-  
001) or Compaq tamper-resistant bits (Smart Cover FailSafe Key, PN 166527-002)  
Screws  
The screws used in the computer are not interchangeable. They may have standard or  
metric threads and may be of different lengths. If an incorrect screw is used during the  
reassembly process, it can damage the unit. Compaq strongly recommends that all screws  
removed during disassembly be kept with the part that was removed, then returned to their  
proper locations.  
As each subassembly is removed from the computer, it should be placed away  
from the work area to prevent damage.  
✎
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3.3.4  
3.3.5  
Cables and Connectors  
Most cables used throughout the unit are flat, flexible cables. These cables must be  
handled with 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  
whenever possible. In all cases, avoid bending or twisting the cables, and ensure that the  
cables are routed in such a way that they cannot be caught or snagged by parts being  
removed or replaced.  
CAUTION: When servicing this computer, ensure that cables are placed in their proper location during  
the reassembly process. Improper cable placement can damage the computer.  
Hard Drives  
Handle hard drives as delicate precision components, avoiding all physical shock and  
vibration. This applies to failed drives as well as replacement spares.  
!
If a drive must be mailed, place the drive in a bubble-pack mailer or other suitable  
protective packaging and label the package “Fragile: Handle With Care.”  
!
Do not remove hard drives from the shipping package for storage. Keep hard  
drives in their protective packaging until they are actually mounted in the CPU.  
!
!
Avoid dropping drives from any height onto any surface.  
If you are inserting or removing a hard drive, turn off the computer. Do not remove  
a hard drive while the computer is on or in standby mode.  
!
Before handling a drive, ensure that you are discharged of static electricity. While  
handling a drive, avoid touching the connector. For more information about  
preventing electrostatic damage, refer to Section 3.1, “Electrostatic Discharge.”  
!
!
Do not use excessive force when inserting a drive.  
Avoid exposing a hard drive to liquids, temperature extremes, or products that  
have magnetic fields such as monitors or speakers.  
3.3.6  
Lithium Coin Cell Battery  
The battery that comes with the computer provides power to the real-time clock and has a  
minimum lifetime of about three years.  
See Chapter 4, “Removal and Replacement Procedures,” for instructions on the  
replacement procedures.  
WARNING: This computer contains a lithium battery. There is a risk of fire and chemical burn if the  
battery is handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in  
water or fire, or expose it to temperatures higher than 140ºF (60ºC).  
CAUTION: Batteries, battery packs, and accumulators should not be disposed of together with the  
general household waste.  
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chapter 4  
REMOVAL AND REPLACEMENT PROCEDURES  
This chapter provides general service information for the computer. Adherence to the  
procedures and precautions described in this chapter is essential for proper service.  
After completing all necessary removal and replacement procedures, run the Diagnostics  
utility to verify that all components operate properly.  
4.1  
Disassembly Sequence Chart  
Use the chart below to determine the disassembly sequence for removing components  
from the computer.  
4.3  
4.4  
4.5  
Feet Installation  
Cable Lock  
Access Panel  
4.6  
Front Bezel  
4.7  
4.8  
4.9  
Power Button  
Subpanel and Bezel Blanks  
Power Switch Assembly  
4.10.1 Removing an Internal 3.5-Inch Hard Drive  
4.10.2 Removing an External 5.25-Inch Drive  
4.10.3 Removing an External 3.5-Inch Drive  
Expansion Boards  
4.11  
4.12  
4.13  
4.14  
4.15  
4.16  
4.17  
4.18  
System Memory  
Graphics Cards  
Processor  
System Board  
Lithium Battery  
Chassis Fan Assembly  
Power Supply  
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4.2  
Disassembly Preparation  
Before adding any internal options or performing a removal/replacement:  
1. Remove any diskette, compact disc, or tape from the computer.  
2. Turn off the computer and any peripheral devices that are connected to it.  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
CAUTION: Turn off the computer before disconnecting any cables.  
3. Disconnect the power cord from the electrical outlet and then from the computer.  
4. Disconnect all peripheral device cables from the computer.  
✎
During disassembly, label each cable as you remove it, noting its position and  
routing. Keep all screws with the components removed.  
CAUTION: The screws used in the computer are of different thread sizes and lengths; using the  
wrong screw in an application may damage the unit.  
WARNING: To reduce the risk of personal injury from hot surfaces, allow the internal system  
components to cool before touching.  
CAUTION: Static electricity can damage the electronic components of the computer or optional  
equipment. Before beginning these procedures, ensure that you are discharged of static electricity  
by briefly touching a grounded metal object. For more information, refer to Chapter 3, “Removal  
and Replacement Preliminaries.”  
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4.3  
Feet Installation  
Four (4) rubber feet are mounted to the chassis, as shown below. No parts have to be  
removed to access the feet. The replacement feet have an adhesive surface and are shipped  
with a protective backing in place. Remove the backing from the feet before installation.  
If necessary, remove the old feet and remove any adhesive residue from the chassis.  
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4.4  
Cable Lock  
WARNING: To avoid injury, use care in handling the separated pieces of the cable lock  
bracket; metal edges may be sharp. Be sure to install the bracket so that sharp edges do  
not extend from the edges of the computer chassis.  
Depending on the model, the computer includes a cable lock provision, which consists of  
a three-piece security bracket. The bottom part of the bracket is attached to the computer  
with a screw; the top part of the bracket covers the screw and prevents its removal.  
1. Separate the pieces of the security bracket by bending the metal where the three pieces  
join.  
2. Slide the tab on the narrow piece of the bracket into the notch on the back of the  
computer and rotate this piece toward the screw hole, then slide the U-shaped piece of  
the bracket between the narrow piece and the computer.  
3. Position both pieces of the bracket over the screw hole and secure the bracket to the  
computer with the screw provided.  
4. Cover the screw with the flat portion of the security bracket.  
5. Install a padlock (not provided) to secure the top part of the security bracket and inhibit  
access to the inside of the computer. Install a cable lock (not provided) to inhibit access  
to the interior of the computer and secure the computer to a fixed object.  
To remove the cable lock provision, reverse the above procedure.  
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4.5  
Access Panel  
1. Prepare the computer for disassembly (Section 4.2).  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
2. Lay the computer down on its large base for greater stability.  
3. Loosen the two thumbscrews that secure the access panel to the back of the computer  
chassis.  
4. Slide the access panel backward approximately 1-inch (2.5-cm); then lift it up and off  
the unit.  
To replace the access panel, reverse the previous steps.  
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4.6  
Front Bezel  
1. Prepare the computer for disassembly (Section 4.2).  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
2. Remove the access panel (Section 4.5).  
3. Press the release tabs 1on the side of the front bezel.  
4. Rotate the front bezel away from the chassis to remove it from the unit 2.  
When replacing the front bezel, ensure that the bottom hinge points are properly  
placed in the chassis before rotating the front bezel back into its original position.  
✎
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4.7  
Power Button  
1. Prepare the computer for disassembly (Section 4.2).  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
2. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.5).  
4. Remove the front bezel (Section 4.6).  
5. Pinch the two tabs of the power button together and pull the button out of the front  
bezel. The spring will follow the button out of the housing.  
To replace the power button, reverse the above procedure.  
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4.8  
Subpanel and Bezel Blanks  
The subpanel and bezel blanks must be removed from the front bezel if you are installing  
a mass storage device for the first time.  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
1. Prepare the computer for disassembly (Section 4.2).  
2. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.5).  
4. Remove the front bezel (Section 4.6).  
5. Pull on the subpanel to remove it from the inside of the front bezel.  
CAUTION: Hold the subpanel straight when you pull it away from the front bezel. Pulling at an  
angle could damage the pins that align the subpanel within the front bezel.  
6. Gently push on the bezel blanks to remove them from the subpanel.  
CAUTION: When replacing the subpanel, ensure that the aligning pins and any remaining bezel  
blanks are in the proper orientation to prevent damage to the alignment pins.  
The subpanel has markings on it to facilitate installation.  
✎
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4.9  
Power Switch Assembly  
CAUTION: The power switch should not be removed from the switch holder. Doing so may  
damage the switch components.  
1. Prepare the computer for disassembly (Section 4.2).  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
2. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.5).  
4. Remove the front bezel (Section 4.6).  
5. Disconnect the power/LED cable from the system board 1.  
6. Push the release tab 2toward the drive bays, then remove the power switch assembly  
from the chassis.  
To install the new power switch, reverse the above procedure, pushing the switch  
assembly until it snaps into place. The power/LED connector is keyed to ensure proper  
installation.  
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4.10  
Mass Storage Devices  
The Compaq Deskpro EX Series of Personal Computers support up to five drives in  
various configurations.  
Drive Positions  
Reference Drive Bay  
Configuration  
1, 2  
Two standard 5.25-inch, half-height bays for optional drives.  
12  
3
One standard 3.5-inch, 1.44-MB diskette drive mounted with a drive  
adapter into a 5.25-inch bay.  
3
4, 5  
Two standard 3.5-inch drive bays; bay 4 contains the preinstalled  
hard drive, bay 5 is available for an optional hard drive.  
45  
Drive bay numbers are stamped on the chassis.  
✎
To verify the type and size of the mass storage devices installed in the computer, run  
Computer Setup.  
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When installing additional drives, follow these guidelines:  
!
For optimal performance, connect hard drives to the primary controller. Connect  
expansion devices, such as CD-ROM, IDE tape, and diskette drives to the  
secondary controller.  
!
!
You may install either a third-height or a half-height drive into a half-height bay.  
You must install guide screws to ensure that the drive lines up correctly in the  
drive cage. Compaq has provided extra guide screws, which are installed in the  
front of the computer chassis, behind the front bezel. Some options require metric  
hardware. Compaq-supplied metric screws are black.  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
Using the Cable-Select Feature with Ultra ATA Devices  
Optional drives are available from Compaq in kits that include a special drive cable. The  
configuration of the drives employs a cable-select feature that identifies the drives as  
device 0 (primary drive) or device 1 (secondary drive). The system board determines  
which drive is device 0 or device 1, based on the way the drives are connected to the  
special drive cable. The device 0 drive is the drive connected to the short segment of the  
drive cable (or that connector closest to the system board); the device 1 drive is the drive  
connected to the long segment of the drive cable.  
Drive installation requires no jumper setting changes on the existing or optional drives.  
All Compaq drives have the jumpers preset for cable-select installation.  
✎
If installing a second device on the primary controller, you must use an  
80-conductor Ultra ATA cable for optimal performance. This cable is  
available as a Compaq option.  
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4.10.1 Removing an Internal 3.5-Inch Hard Drive  
1. Prepare the computer for disassembly (Section 4.2).  
2. Remove the access panel (Section 4.5).  
3. Remove the front bezel (Section 4.6).  
4. Disconnect the power and data cables from the back of the hard drive.  
5. Slide the drivelock mechanism to unlock the hard drives 1.  
6. While holding the drivelock in the unlocked position, remove the drive from the drive  
bay 2.  
7. Remove the guide screws from the drive.  
8. Install two guide screws on each side of the replacement drive (use silver screws).  
Metric screws (M3) have a black finish while U.S. screws (#6) have a silver  
finish.  
✎
Replace the 3.5-inch drive by reversing the above procedure.  
CAUTION: When servicing the computer, ensure that cables are placed in their proper locations  
during the reassembly process. Improper cable placement can damage the computer.  
CAUTION: Use only 3/16-inch or 5-mm long screws as guide screws. Longer screws can damage  
the internal components of the drive.  
When installing a second ATA hard drive on the primary controller, you must use  
an 80-conductor ATA cable for optimal performance.  
✎
The system automatically recognizes hard drives sold by Compaq (or any other plug and  
play hard drive) and will automatically reconfigure the computer. If you installed a third-  
party hard drive, or one that is not a plug and play device, you must run Computer Setup  
to reconfigure the computer.  
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4.10.2 Removing an External 5.25-Inch Drive  
1. Prepare the computer for disassembly (Section 4.2).  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
2. Remove the access panel (Section 4.5).  
3. Remove the front bezel (Section 4.6).  
4. Slide the drivelock mechanism to unlock the drive 1.  
5. While the drivelock is held in the unlatched position, remove the drive from the drive  
bay 2.  
6. Remove the guide screws from the drive.  
To install a new drive:  
1. Install two guide screws on each side of the replacement drive.  
Metric screws (M3) have a black finish while U.S. screws (#6) have a silver  
finish. CD and DVD drives use black metric screws.  
✎
2. Ensure that the guide screw lines up with the guide slots, then gently slide the drive into  
the drive bay until it snaps into place.  
3. Connect the power and signal cables to the back of the drive.  
4. Remove the bezel blank from the subpanel, if necessary (Section 4.8).  
5. Reinstall the subpanel and the front bezel.  
The system automatically recognizes hard drives sold by Compaq (or any other plug and  
play hard drive) and will automatically reconfigure the computer. If you installed a third-  
party hard drive, or one that is not a plug and play device, you must run Computer Setup  
to reconfigure the computer.  
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4.10.3 Removing an External 3.5-Inch Drive  
If you are installing a second 3.5-inch diskette drive into 5.25-inch bays #1 or 2 for the  
first time, you must use a special adapter bracket.  
If you are installing a 3.5-inch diskette drive into 5.25-inch bay #3, you must use a special  
adapter bracket.  
If installing a second ATA hard drive on the primary controller, you must use an 80-  
conductor ATA cable for optimal performance.  
1. Prepare the computer for disassembly (Section 4.2).  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
2. Remove the access panel (Section 4.5).  
3. Remove the front bezel (Section 4.6).  
✎
The primary diskette drive is always installed in drive bay 3.  
4. Slide the drivelock mechanism to unlock the drive 1.  
5. While the drivelock is held in the unlatched position, remove the drive from the drive  
bay 2.  
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6. Remove the bracket brace 1from the top of the drive adapter by squeezing inward  
on both sides, then rotating the brace up and out.  
7. Remove the drive bezel 2.  
8. Remove the three screws 3that secure the drive 4to the drive adapter.  
9. Lift the drive out of the drive adapter.  
10. Remove the guide screws from the drive 5.  
To replace the drive, reverse the previous procedures.  
The primary 3.5-inch diskette drive should only be installed into bay 3. Bay 3 is  
the bottom bay in the minitower.  
✎
When replacing the drive, use the existing screws.  
Metric screws (M3) have a black finish while U.S. screws (#6) have a silver  
finish.  
Diskette drives use black metric screws. The drive adapters use silver U.S.  
screws.  
CAUTION: When servicing the computer, ensure that cables are placed in their proper locations  
during the reassembly process. Improper cable placement can damage the computer.  
CAUTION: Use only 3/16-inch or 5-mm long screws as guide screws. Longer screws can damage  
the internal components of the drive.  
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4.11  
Expansion Boards  
4.11.1 Expansion Board Slots  
1
PCI expansion slots  
2
AGP graphics slot  
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4.11.2 Removing a PCI Expansion Board  
1. Prepare the computer for disassembly (Section 4.2).  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
2. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.5).  
4. Disconnect any cables from the expansion board, noting their location for reinstallation.  
5. Remove the expansion board retaining screw.  
6. Hold the board at each end and carefully rock it back and forth while pulling upward  
until the connectors pull free from the slot. Be sure not to scrape the card against other  
components  
7. If not installing another expansion board in the slot, then close off the open slot by  
installing an expansion slot cover with a screw.  
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4.11.3 Installing a PCI Expansion Board  
1. Prepare the computer for disassembly (Section 4.2).  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
2. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.5).  
4. If you are installing an expansion board for the first time, remove the expansion slot  
cover.  
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5. Hold the board at each end and carefully rock it back and forth while pushing  
downward, until the connectors fit completely and firmly into the expansion slot.  
6. Secure the board to the chassis with the retaining screw.  
7. Attach any cables that came with the board.  
If installing a NIC board, attach the WOL power cable to connector P9 on the  
system board, if applicable.  
✎
8. Reassemble the computer.  
The computer should automatically recognize the added plug and play board.  
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4.12  
System Memory  
The computer comes with synchronous dynamic random access memory (SDRAM) dual  
inline memory modules (DIMMs). The Intel 815 chipset comes with at least 64 MB of  
SDRAM DIMMS, upgradeable to 512 MB.  
DIMMs  
The memory sockets on the Intel 815 chipset–based system board can be populated with  
industry-standard DIMMs. These memory module slots are populated with at least one  
preinstalled memory module. To achieve the maximum memory support, you may be  
required to replace the preinstalled DIMM with a higher capacity DIMM.  
For proper system operation, the DIMMs must be industry-standard 168-pin, unbuffered  
PC100– or PC133– compliant SDRAM DIMMs, depending on the model. The SDRAM  
DIMMs must support CAS Latency 2 or 3 (CL = 2 or CL = 3). They must also contain the  
mandatory Joint Electronic Device Engineering Council (JEDEC) Serial Presence Detect  
(SPD) information. DIMMs constructed with x4 SDRAM (16 ICs per side) are not  
supported; the system will not start using unsupported DIMMs.  
The Intel 815 chipset supports both PC100 and PC133 SDRAM DIMMs. PC133 DIMMs  
should be used for optimal performance. If both PC100 and PC133 SDRAM DIMMs are  
installed in a computer, the system memory will run at the lower 100Mhz speed. Some  
configurations of PC133 SDRAMs may run at 100Mhz, instead of 133Mhz.  
Memory Module Installation  
CAUTION: Your memory module sockets have gold metal contacts. When upgrading your memory,  
it is important to use memory modules with gold metal contacts to prevent corrosion and/or  
oxidation resulting from having incompatible metals in contact with each other.  
CAUTION: Static electricity can damage the electronic components of the computer or optional  
cards. Before beginning these procedures, ensure that you are discharged of static electricity by  
briefly touching a grounded metal object. Refer to Appendix F, “Electrostatic Discharge,” for more  
information.  
CAUTION: When handling a memory module, be careful not to touch any of the contacts. Doing so  
may damage the module.  
4-20  
Removal & Replacement Procedures  
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To install a memory module, complete the following steps:  
Prepare the computer for disassembly (Section 4.2).  
1.  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
2.  
3.  
Remove the access panel (Section 4.5).  
Open both latches of the memory socket ", and insert the memory module into the  
socket #.  
4.  
A memory module can be installed in only one way. Match the notch on the module  
with the tab on the memory socket. Push the module down into the socket, ensuring the  
module is securely seated. Close both latches $.  
5.  
6.  
7.  
Repeat step 4 for any additional modules you want to install.  
Reassemble the computer.  
Turn on the computer.  
When a memory module has been removed, moved, or added, Memory Change  
Alerts, a feature of Intelligent Manageability, alerts the system administrator and  
end user. The system automatically recognizes the added memory.  
✎
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4.13  
Graphics Cards  
The AGP expansion slot may come with a retention mechanism installed around it to hold  
the graphics cards securely in place. There are two different types of retention  
mechanisms that may be installed around the AGP expansion slot.  
4.13.1 Graphics Performance Accelerator (GPA)/AGP Inline Memory  
Module (AIMM) Card with a Type I Retention Mechanism  
Removing a GPA/AIMM Card  
1. Prepare the computer for disassembly (Section 4.2).  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
2. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.5).  
4. Pull the arm on the right side of the retention mechanism 1.  
5. At the same time, rotate the front of the GPA/AIMM card up until it is at a 45 degree  
angle 2.  
6. Remove the card from the expansion slot 3.  
4-22  
Removal & Replacement Procedures  
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Installing a GPA/AIMM Card  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
1. Prepare the computer for disassembly (Section 4.2).  
2. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.5).  
4. Insert the hook 1on the left side of the GPA/AIMM card under the loop 2on the left  
side of the retention mechanism.  
5. Rotate the right side of the card down until it is at a 45 degree angle 3.  
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6. With the GPA/AIMM card at a 45 degree angle, slide the card toward the back of the  
expansion slot 4until the fingers on the bottom of the card line up properly with the  
connectors in the expansion slot.  
CAUTION: The fingers on the bottom of the GPA/AIMM card must be properly aligned with the  
expansion slot during installation. Misalignment may result in damage to the card or the AGP  
connector.  
7. While pulling the arm on the right side of the retention mechanism 5, rotate the card  
down into the expansion slot until seated 6.  
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Removal & Replacement Procedures  
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4.13.2 AGP Card with a Type I Retention Mechanism  
Removing an AGP Card  
1. Prepare the computer for disassembly (Section 4.2).  
2. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.5).  
4. Remove the screw at the top of the expansion slot.  
5. Pull the arm on the right side of the retention mechanism.  
6. Pull the card straight up to remove it from the expansion slot.  
To install the graphics card, reverse the above procedures.  
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4.13.3 GPA/AIMM Card with a Type 2 Retention Mechanism  
Removing a GPA/AIMM Card  
1. Prepare the computer for disassembly (Section 4.2).  
2. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.5).  
4. Pull the arm on the right side of the retention mechanism.  
5. Pull the card straight up to remove it from the expansion slot.  
To install the graphics card, reverse the above procedures.  
4-26  
Removal & Replacement Procedures  
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4.13.4 AGP Card with a Type 2 Retention Mechanism  
Removing an AGP Card  
1. Prepare the computer for disassembly (Section 4.2).  
2. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.5).  
4. Remove the screw at the top of the expansion slot.  
5. Pull the arm on the right side of the retention mechanism.  
6. Pull the card straight up to remove it from the expansion slot.  
To install the graphics card, reverse the above procedures.  
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4.13.5 Standard AGP Expansion Card  
Removing an AGP Card  
1. Prepare the computer for disassembly (Section 4.2).  
2. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.5).  
4. Remove the screw at the top of the expansion slot.  
5. Remove the AGP graphics board as you would any PCI expansion board  
(Section 4.11.2).  
4-28  
Removal & Replacement Procedures  
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4.14  
Processor  
1. Prepare the computer for disassembly (Section 4.2).  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
2. Remove the computer cover (Section 4.3).  
3. If there is a fansink on the processor, unplug the fan cable from the system board.  
4. Remove the heatsink retaining clip 1by pressing down on the clip’s extended tab until  
it releases from the safety catch.  
5. Lift the heatsink 2off the processor.  
6. Release the processor 3from the socket by pulling the handle on the ZIF socket out  
and upward 4.  
7. Lift the processor out of the socket.  
WARNING: Removing the heatsink from the processor destroys the integrity of the thermal  
interface pad between the two. Whenever the heatsink is removed, the thermal interface pad  
must to be removed and a new one installed in its place.  
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Before installing a fansink, prepare for its installation by doing one of the following:  
•
New heatsink: if the heatsink has a thermal interface attached to its bottom, peel off the  
protective paper before installing the heatsink, if necessary.  
•
Reinstalled heatsink: Note where the thermal interface is located on the heatsink. Carefully  
remove the thermal interface pad and all residue from the heatsink surface. If any thermal  
interface remains on the die of the processor, scrape it off with your fingernail. A Q-Tip  
dipped in alcohol can be used to clean both surfaces. Add thermal interface pad to the  
bottom of the heatsink before reinstalling the original heatsink to insure an efficient thermal  
interface. Use Compaq part number 210397-001 thermal interface pad.  
CAUTION: Thermal interface heat transmission is reduced if residue remains on the heatsink or  
processor, or the heatsink thermal interface surface is scratched. This could lead to the processor  
running at a higher than normal temperature, fan turning at a higher than normal speed, and  
possible loss of data if processor shuts down from overheating.  
Ensure that the pins on the processor are properly aligned before inserting the  
processor in the ZIF socket. Two corners of the processor will not have an  
outermost pin.  
✎
All units with 866 MHz and faster processors require an active fansink. When  
installing the fan, make sure it is positioned so it blows down on the processor.  
✎
All units with 866 MHz and faster processors require use of a chassis fan  
(Section 4.15).  
✎
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Removal & Replacement Procedures  
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4.15  
System Board  
More information on the system board, including troubleshooting criteria, can be  
found in the Compaq Quick Troubleshooting Guide (part number 153837-001)  
and the Compaq Service Reference Guide (part number 152611-001).  
✎
1. Prepare the computer for disassembly (Section 4.2).  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
2. Remove the access panel (Section 4.5).  
3. Remove all expansion boards (Section 4.11).  
4. Disconnect any cables that are attached to the system board, noting their location for  
reinstallation.  
5. Remove the DIMMs (optional) (Section 4.12).  
6. Remove the graphics card (Section 4.13).  
7. Remove the six retaining screws that secure the system board to the chassis.  
8. Slide the board about ½ inch toward the front of the chassis to disengage the I/O panel,  
then lift it up and out of the chassis.  
To install a new system board, reverse the above procedures.  
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4.16  
Battery  
1. Prepare the computer for disassembly (Section 4.2).  
2. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.5).  
4. Locate the battery on the system board. If you have expansion boards installed, you  
may need to remove them to gain access to the battery (Section 4.11.2).  
5. Lift the battery out of the holder.  
6. Slide the replacement battery into position with the positive side up. The battery holder  
automatically secures the battery in the proper position.  
7. If you removed expansion boards, reinstall them now.  
8. Replace the computer access panel.  
9. Reassemble the computer.  
10. Reconnect the AC power cord and turn on the computer.  
11. Reset the date and time, your passwords, and any special system setups, using Compaq  
Computer Setup.  
WARNING: This computer contains a lithium battery. There is a risk of fire and chemical burn if  
the battery pack is handled improperly. Do not disassemble, crush, puncture, short external  
contacts, dispose in water or fire, or expose it to temperatures higher than 60ºC (140ºF).  
In North America, dispose of nickel metal hydride or lithium batteries by taking advantage of the  
Compaq battery recycling program. You will be provided with a postage-paid battery pack mailer  
preaddressed to a reclamation facility where the metals are recycled. Call the telephone number  
listed for your location in the Contacting Customer Support guide for more information.  
In Europe, do not dispose of batteries with general household waste. Dispose of or recycle them by  
using the public collection system or returning them to Compaq, your authorized Compaq partners,  
or their agents.  
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4.17  
Chassis Fan Assembly  
If the unit has a 866 - 933MHz processor, it requires an external chassis fan.  
✎
1. Prepare the computer for disassembly (Section 4.2).  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
2. Remove the access panel (Section 4.5).  
3. Disconnect the fan power cable 1from the system board.  
4. Remove the four screws 2that secure the fan to the chassis.  
5. Remove the fan from the chassis 3.  
To install the fan assembly, reverse the above procedure.  
This fan is used in units with 866-933 MHz processors.  
✎
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4.18  
Power Supply  
1. Prepare the computer for disassembly (Section 4.2).  
WARNING: Power is continuous to the system board and power supply even when the power  
switch is turned off. To prevent damage to the unit, disconnect the power cord from the power  
source or the unit before beginning disassembly procedures.  
2. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.5).  
4. Disconnect all power cables from the mass storage devices and the system board.  
Power connectors are keyed for correct installation. Note the orientation of each  
cable connector and the routing of the cables to facilitate reassembly.  
✎
5. Remove the four screws that secure the power supply to the back of the chassis.  
6. Slide the power supply toward the front of the computer, then lift up to remove it from  
the chassis.  
To replace the power supply, reverse the above procedure.  
4-34  
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chapter 5  
CONNECTORS AND JUMPERS  
This chapter provides connector, jumper, and switch information for system board  
jumpers, system I/O board connectors, and hard drives for the Desktop Model.  
5.1  
System Board  
5.1.1  
Connectors and Jumpers  
CR28 3.3V Aux LED  
P12 SOS Connector  
CR29 3.3V Main LED (NI)  
P20 Primary IDE Connector  
P21 Secondary IDE Connector  
E6 Firmware Hub Top Block Lock (Installed=Bootblock  
unprotected, Removed=Bootblock protected)  
E29 SCSI LED Cable Connector  
P70 CPU Fan Connector  
P100 ITP Connector (NI)  
E49 Clear Password Header (Installed = Enabled,  
Removed = Cleared)  
J20-22 PCI Slots  
P701 CD-ROM Audio  
P216 Chassis Fan Connector  
SW50 Clear CMOS  
J40 AGP/AIMM Connector  
P1 Power Supply Connector  
P5 Power Button, Front Panel LED Cable Connector  
P10 Diskette Drive Connector  
P11 Aux Audio Connector  
XBT1 CMOS Battery  
XMM1-2 DIMM Memory Slots  
XU1 Primary Processor Socket  
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5.1.2  
Clearing CMOS  
The computer's configuration (CMOS) may occasionally be corrupted. If it does, it is  
necessary to clear the CMOS memory using push button switch SW50.  
To clear and reset the configuration, perform the following procedure:  
1. Prepare the computer for disassembly (Section 4.2).  
CAUTION: The power cord must be disconnected from the power source before pushing the Clear  
CMOS Button (NOTE: All LEDs on the board should be OFF). Failure to do so may damage the  
system board.  
2. Remove the access panel (Section 4.5).  
3. Press the CMOS button located on the system board and keep it depressed for  
5 seconds.  
4. Replace the access panel.  
5. Turn the computer on.  
6. Run F10 Computer Setup to reconfigure the system.  
5-2  
Connectors and Jumpers  
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5.1.3  
Disabling or Clearing the Power-On and Setup Passwords  
1. Turn off the computer and any external devices, and disconnect the power cord from  
the power outlet.  
2. Disconnect the keyboard, monitor, and any other external devices connected to the  
computer.  
3. Remove the computer cover.  
4. Locate the header and jumper labeled E49.  
5. Remove the jumper from pins 1 and 2. Place the jumper over pin 2 only, in order to  
avoid losing it.  
6. Replace the computer cover.  
7. Reconnect the external equipment.  
8. Plug in the computer and turn on power. Allow the operating system to start. This clears  
the current passwords and disables the password features.  
9. To re-enable the password features, repeat steps 1-4, then replace the jumper on pins 1  
and 2.  
10. Repeat steps 6-8, then establish new passwords.  
Refer to the Computer Setup (F10 Setup) instructions to establish new passwords.  
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5.2  
Hard Drive Jumper Settings  
5.2.1  
Seagate, Quantum, and Western Digital  
The drawings and tables below apply to a number of different size drives in the following  
paragraphs.  
Seagate, Quantum, and Western Digital  
Ultra ATA Hard Drive Jumper Settings  
Definition Seagate  
Quantum  
Western Digital  
Single  
7 - 8  
1 - 2 and 3 - 5  
3 - 5  
Primary  
Secondary  
5 - 6 and 7 - 8  
No connection  
1 - 2 and 3 - 5  
3 - 5  
5 - 6  
3 - 4  
1 - 2  
Cable Select 5 - 6  
2 - 4 and 3 - 5  
5-4  
Connectors and Jumpers  
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5.2.2  
Maxtor  
Maxtor Ultra ATA Hard Drive Jumper Settings  
Definition  
J50 J48 J46 J44 J42  
Single  
J
Primary (in a dual-drive system)  
Secondary  
J
O
Cable Select  
Disabled*  
Enabled  
O
J
4092 Cylinder Limitation  
Disabled*  
O
J
Enabled  
Factory Reserved  
Factory Reserved  
O
O
* = Default setting  
J = Jumper  
O = No jumper  
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chapter 6  
SPECIFICATIONS  
6.1  
Specifications  
6.1.1  
System  
Dimensions  
Height  
17.65 in  
6.60 in  
16.80 in  
44.83 cm  
16.76 cm  
42.67 cm  
Width  
Depth  
26 lb  
11.8 kg  
Weight (approximate, depending on configuration)  
Power Supply, 200 Watt  
Operating Voltage Range  
Rated Voltage Range  
Rated Line Frequency  
Rated Input Current (Maximum)  
Maximum Rated Power  
90-132 Vac  
120-127 Vac  
47-63 Hz  
5.5A  
180-264 Vac  
200-240 Vac  
47-63 Hz  
3A  
200W  
200W  
Environmental Requirements:  
Temperature  
Operating  
50 to 95°F  
10 to 35°C  
Shipping  
-4° to 140°F  
-20° to 60°C  
Humidity (noncondensing)  
Operating  
20% to 80%  
10% to 90%  
20% to 80%  
10% to 90%  
Nonoperating  
Maximum Altitude (unpressurized)  
Operating  
10,000 ft  
30,000 ft  
3048 m  
9144 m  
Nonoperating  
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6.1.2  
System Interrupts  
Hardware IRQ  
System Function  
0
Timer Interrupt  
1
Keyboard  
2
Interrupt Controller Cascade  
Serial Port (COM B)  
Serial Port (COM A)  
Audio  
3
4
5
6
Diskette Drive  
7
Parallel Port (LPT 1)  
Real-Time Clock  
Available for PCI  
Available for PCI  
Available for PCI  
Mouse  
8
9
10  
11  
12  
13  
14  
15  
Coprocessor  
Primary IDE Controller  
Secondary IDE Controller  
6.1.3  
System DMA  
Hardware DMA  
System Function  
0
Unused  
1
2
3
4
5
6
7
Unused  
Diskette Drive  
ECP Parallel Port LPT1 (Default; Alternate = DMA 0)  
DMA Controller Cascading  
Unused  
Unused  
Unused  
6-2  
Specifications  
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6.1.4  
ICH Fixed I/O Registers  
Port  
Register Name  
00h, 02h, 04h, 06h  
Channel 0, 1, 2, 3 DMA Base & Current Address Regsiter  
Channel 4, 5, 6, 7 DMA Base & Current Address Register  
Channel 0, 1, 2, 3 DMA Base & Current Count Register  
Channel 4, 5, 6, 7 DMA Base & Current Count Register  
Aliased at 00h-0Fh  
C0h, C4h, C8h, CCh  
01h, 03h, 05h, 07h  
C2h, C6h, Cah, CEh  
10h-1Fh  
20h  
Master PIC ICW1 Init. Cmd Word 1 Register  
Master PIC OCW2 Op Ctrl Word 2 Register  
Master PIC OCW3 Op Ctrl Word 3 Register  
Master PIC ICW2 Init. Cmd Word 1 Register  
Master PIC ICW3 Init. Cmd Word 1 Register  
Master PIC ICW4 Init. Cmd Word 1 Register  
Master PIC OCW1 Op Ctrl Word 3 Register  
Aliased at 20h-21h  
21h  
24h-25h, 28-29h,  
2Ch-2Dh, 30h-31h,  
34h-35h, 38h-39h,  
3Ch-3Dh  
40h  
41h  
42h  
43h  
Counter 0 Interval Time Status Byte Format  
Counter 0 Counter Access Port Register  
Counter 1 Interval Time Status Byte Format  
Counter 1 Counter Access Port Register  
Counter 2 Interval Time Status Byte Format  
Counter 2 Counter Access Port Register  
Timer Control Word Register  
Timer Control Word Register Read Back  
Counter Latch Command  
50h-53h  
61h  
Aliased at 40h-43h  
NMI Status and Control Register  
NMI Enable Register  
70h  
Real-Time Clock (Standard RAM) Index Register  
Real-Time Clock (Standard RAM) Target Register  
Extended RAM Index Register  
71h  
72h  
73h  
Extended RAM Target Register  
74h-75h  
76h-77h  
81h, 82h, 83h  
84h-86h, 88h  
89h, 8Ah, 8Bh  
8CH-8Eh  
8Fh  
Aliased at 70h-71h  
Aliased at 72h-73h or 70h-71h  
Channel 2, 3, 1 DMA Memory Low Page Register  
Reserved Page Registers  
Channel 6, 7, 5 DMA Memory Low Page Register  
Reserved Page Registers  
Refresh Low Page Register  
91h-9Fh  
Aliased at 81h-8Fh  
(except 92h)  
92h  
Fast A20 and INIT Register  
continued  
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ICH Fixed I/O Registers cont  
Port  
Register Name  
CF9h  
Reset Control Register  
A0h  
Slave PIC ICW1 Init. Cmd Word 1 Register  
Slave PIC OCW2 Op Ctrl Word 2 Register  
Slave PIC OCW3 Op Ctrl Word 3 Register  
Slave PIC ICW2 Init. Cmd Word 2 Register  
Slave PIC ICW3 Init. Cmd Word 3 Register  
Slave PIC ICW4 Init. Cmd Word 4 Register  
Slave PIC OCW1 Op Ctrl Word 1 Register  
Aliased at A0h-A1h  
A1  
A4h-A5h, A8h-A8h,  
ACh-ADh, B0h-B1h,  
B4h-B5h, B8h-B9h,  
BCh-BDh  
B2h  
Advanced Power Management Control Port Register  
Advanced Power Management Status Port Register  
Channel 4, 5, 6, 7 DMA Base and Current Address Register  
Aliased at C0h  
B3h  
C0h, C4h, C8h, CCh  
C1h  
C5h  
Aliased at C4h  
C9h  
Aliased at C8h  
CDh  
Aliased at CCh  
C2h, C6h, CAh, CEh  
Channel 4, 5, 6, 7 DMA Base and Current Count Register  
Aliased at C2h  
C3h  
C7h  
CBh  
CFh  
D0h  
Aliased at C6h  
Aliased at CAh  
Aliased at Ceh  
Channel 4-7 DMA Command Register  
Channel 4-7 DMA Status Register  
Aliased at D0h  
D1h  
D4h  
Channel 4-7 DMA Write Single Mask Register  
Aliased at D4h  
D5h  
D6h  
Channel 4-7 DMA Channel Mode Register  
Aliased at D6h  
D7h  
D8h  
Channel 4-7 DMA Clear Byte Pointer Register  
Aliased at D8h  
D9h  
DAh  
DBh  
DCh  
DEh  
DEh  
DFh  
F0h  
Channel 4-7 DMA Master Clear Register  
Aliased at DAh  
Channel 4-7 DMA Clear Mask Register  
Aliased at DCh  
Channel 4-7 DMA Write All Mask Register  
Aliased at DEh  
Coprocessor Error Register  
170h-177h  
PIO Mode Command Block Offset for Secondary Drive  
continued  
6-4  
Specifications  
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ICH Fixed I/O Registers cont  
Port  
Register Name  
1F0h-1F7h  
PIO Mode Command Block Offset for Primary Drive  
376h  
PIO Mode Control Block Offset for Secondary Drive  
PIO Mode Control Block Offset for Primary Drive  
Master PIC Edge/Level Triggered Register  
PIO Mode Control Block Offset for Primary Drive  
Master PIC Edge/Level Triggered Register  
Slave PIC Edge/Level Triggered Register  
Super I/O  
3F6h  
4D0h  
3F6h  
4D0h  
4D1h  
400-47F  
F800-F87F  
FA00-FA3F  
FC00-FC0F  
Reserved (power management)  
Reserved (GPIO management)  
Reserved (SMBUS controller)  
NOTE: When the POS_DEC_EN bit is set, additional I/O ports get positively  
decoded by the ICH.  
6.1.5  
System Memory Map  
Size  
Memory Address  
System Function  
512 KB  
FFFFFFFFh to FFF80000  
System ROM  
3839 MB  
511 MB  
128KB  
96 KB  
FFFBFFFFh to 10000000h  
0FFFFFFFh to 00100000h  
000FFFFFh to 000E0000h  
000DFFFFh to 000C8000h  
000C7FFFh to 000C0000h  
000BFFFFh to 000A0000h  
0009FFFFh to 00000000h  
PCI Memory Expansion  
HOST or PCI Memory Expansion  
System ROM  
PCI Option ROMs  
Video ROM  
32 KB  
128 KB  
640 KB  
Video RAM  
Base Memory  
Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 6-5  
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6.2  
Drives  
6.2.1  
1.44-MB Diskette Drive  
Size and Capacity  
Size (in)  
3.5  
1.44  
High Density (MB)  
720  
Low Density (KB)  
210795-001  
Compaq Spare Part Number  
Light  
Green  
300  
Drive Rotation (rpm)  
Height  
One-third (1 inch)  
512  
Bytes per Sector  
18/9  
80/80  
2
Sectors per Track (high/low density)  
Tracks per Side (high/low density)  
Read/Write Heads  
80/80  
Cylinders (high/low density)  
Average Seek Time (ms)  
Track-to-Track (high/low)  
Average (high/low)  
3/6  
94/173  
15  
Settling Seek Time  
100  
Latency Average (ms)  
6-6  
Specifications  
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6.2.2  
Ultra ATA Hard Drives  
10.0 GB  
15.0 GB  
Formatted Capacity  
Physical (MB)  
10242  
10242  
15364  
15364  
Logical (MB)  
203139-001  
202903-001  
Compaq Spare Part Number  
Logical Block Allocation  
Total Sectors  
16514064  
19541088  
16514064  
29336832  
User Addressable Sectors  
Sectors per Track  
Physical  
648-396  
63  
648-396  
63  
Logical  
Data Heads/Cylinder  
Physical  
2
16  
3
16  
Logical  
512  
512  
Data Bytes/Sector  
Sector Interleave  
1:1  
1:1  
24  
24  
ECC Bytes  
24/26 EPRML  
15 seconds  
15 seconds  
24/26 EPRML  
15 seconds  
15 seconds  
Encoding Method  
Spin-Up Time (maximum)  
Spin-Down Time (maximum)  
Seek Times, Logical  
MAX  
TYP  
MAX  
TYP  
(Busy to Seek Complete)  
4.75ms 2.1ms  
11.5ms 10.9ms  
27.0ms 25.0ms  
4.75ms 2.1ms  
11.5ms 10.9ms  
27.0ms 25.0ms  
Track-to-Track  
Average (Read)  
Full Stroke  
5.56ms  
5.56ms  
Average Latency  
Data Transfer Rate  
@Disk to Buffer  
@Interface w/o IORDY  
DMA  
308 Mbits/s (max.)  
16.6 MB/s  
16.6 MB/s  
308 Mbits/s (max.)  
16.6 MB/s  
16.6 MB/s  
66.6 MB/s  
66.6 MB/s  
UDMA  
5400+/-0.2%  
5400+/-0.2%  
RPM  
Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 6-7  
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6.2.3  
CD-ROM Drives  
48X Max  
187263-001  
Compaq Spare Part  
Number  
16.6  
Data Buffer (ms)  
150 KB/s Min (audio)  
CD: 3000-7200 KB/s  
Data Transfer Rate  
Access Time (ms)  
Random  
<100  
<150  
Full-Stroke Seek  
128 KB  
ATAPI  
Cache Buffer  
Interface  
Photo-CD/Multisession  
CD-ROM  
Disk Formats Read  
Multi Read  
CD TEXT  
Audio CD  
CD-I  
CD-RW  
CD-R  
CD EXTRA  
CD-ROM XA  
Disk  
CD: 650 MB  
Capacity  
Mode 1 – 2048 bytes  
Mode 2 – 2340, 2336 bytes  
CD-DA – 2353 bytes  
CD-XA – 2328 bytes  
Block Size  
12 cm;8 cm  
1.2 mm  
Diameter  
Thickness  
Track Pitch  
1.6 um  
Audio Output Level  
Line Out  
0.7 V @ 47 K ohm  
0.6 V @ 32 ohm  
Headphone  
<7 sec (typical); <30 sec with  
multisession  
Startup Time  
Operating Conditions  
Temperature  
5 – 45 C  
10-80% relative humidity  
Humidity  
Dimensions (mm)  
(HxWxD)  
42.9x150.1x208  
1200  
Weight (grams)  
None  
MPEG Playback Graphics  
Solution Support  
6-8  
Specifications  
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6.3  
6.4  
Compaq Keyboard  
Compaq Easy Access  
Dimensions  
1.4 in  
18.3 in  
6.3 in  
Height  
Width  
Depth  
Scroll Mouse  
Dimensions  
Height  
1.34 in  
4.45 in  
2.36 in  
3.4 cm  
11.3 cm  
6.0 cm  
Length  
Width  
4.59 oz  
400 dpi  
10 in/sec  
130 g  
Weight  
15.8 dp  
25 cm/sec  
Base Resolution  
Tracking Speed  
(maximum)  
Temperature  
Operating  
50°F to 104°F  
-22°F to 140°F  
10°C to 50°C  
-30°C to 60°C  
Non-operating  
Lifetime  
Mechanical  
Switch  
300 miles  
1 million operations  
483 km  
1 million operations  
Relative Humidity  
Operating  
10% to 90%  
20% to 80%  
10% to 90%  
20% to 80%  
Non-operating  
Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 6-9  
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6.5  
Supported Graphics Resolutions  
6.5.1  
Intel 3D Graphics  
Colors  
256  
65K  
16.7M  
85 Hz  
85 Hz  
85 Hz  
640 x 480  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
800 x 600  
1024 x 768  
1152 x 864  
1280 x 1024  
1600 x 1200  
6.5.2  
nVIDIA M64 Pro  
Color Depth  
Mode  
(bits/pixel)  
Refresh Rate (Hz)  
8/16/32  
60,72,75,85  
60,72,75,85  
60,70,75,85  
60,70,72,75,85  
60,70,72,75,85  
60,70,72,75,85  
60  
640 x 480  
8/16/32  
8/16/32  
8/16/32  
8/16/32  
8/16  
800 x 600  
1024 x 768  
1152 x 864  
1280 x 1024  
1600 x 1200  
1600 x 1200  
1920 x 1080  
1920 x 1080  
1920 x 1200  
32  
8/16  
60,70,72,75,85  
60  
32  
8/16  
60,70,72,75,85  
6-10  
Specifications  
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Index  
A
D
G
access panel  
graphics  
specifications, 6-10  
graphics cards  
DIMM  
spare part number, 2-3  
DIMMs, 4-20  
removal and replacement,  
4-5  
removal and replacement,  
4-22  
spare part number, 2-3  
grounding methods, 3-2  
AGP card  
disassembly chart, 4-1  
disassembly preparation, 4-2  
diskette drive  
spare part number, 2-3  
AGP retention mechanism, 4-22  
AIMM card  
spare part number, 2-2  
specifications, 6-6  
spare part number, 2-3  
DMA settings and specifications,  
6-2  
documentation  
H
hard drive  
B
spare part number, 2-5  
drive configurations, 4-10  
drive positions, 1-4  
jumpers, 5-4  
battery  
proper handling, 3-6  
removal and replacement,  
4-12  
proper disposal, 4-32  
removal and replacement,  
4-32  
spare part number, 2-2  
specifications, 6-7  
E
C
cable kit  
spare part number, 2-2  
cable lock  
removal and replacement,  
4-4  
cable select feature, 4-11  
CD-ROM  
specifications, 6-8  
CD-ROM drive  
spare part number, 2-2  
cleaning  
electrostatic discharge (ESD), 3-1  
ESD. See electrostatic discharge  
expansion boards  
removal and replacement,  
4-16  
external 3.5-inch drive  
removal and replacement,  
4-14  
I
I/O Registers, 6-3  
INSPECT utility, 4-10  
IRQ settings, 6-2  
J
external 5.25-inch drive  
removal and replacement,  
4-13  
jumpers  
hard drive, 5-4  
computer, 3-4  
keyboard, 3-4  
F
K
fan assembly  
monitor, 3-4  
keyboard  
removal and replacement,  
mouse, 3-5  
cleaning, 3-4  
4-33  
clearing CMOS, 5-2  
clearing passwords, 5-3  
CMOS  
clearing configuration, 5-2  
computer  
keyboards  
feet  
spare part number, 2-4  
specifications, 6-9  
removal and replacement,  
4-3  
front bezel  
L
removal and replacement,  
cleaning, 3-4  
4-6  
Computer Features  
Rear Panel Connectors, 1-3  
configurations, drives, 4-10  
connectors and jumpers, 5-1  
line-out audio connector, 1-3  
spare part number, 2-1  
Front Panel Controls and LEDs,  
1-2  
Index  
I-1  
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spare part number  
AGP card, 2-3  
M
memory  
R
removal and replacement  
access panel, 4-5  
battery, 4-32  
AIMM card, 2-3  
cable kit, 2-2  
CD-ROM drive, 2-2  
DIMM, 2-3  
diskette drive, 2-2  
documentation, 2-5  
front bezel, 2-1  
graphics cards, 2-3  
hard drive, 2-2  
removal and replacement,  
4-20  
spare part number, 2-3  
standard, 2-3  
cable lock, 4-4  
expansion boards, 4-16  
external 3.5-inch drive, 4-14  
external 5.25-inch drive,  
4-13  
fan assembly, 4-33  
feet, 4-3  
front bezel, 4-6  
graphics cards, 4-22  
hard drive, 4-12  
memory map, 6-5  
microprocessor  
spare part number, 2-3  
miscellaneous screw kit  
spare part number, 2-4  
monitor  
keyboards, 2-4  
memory, 2-3  
cleaning, 3-4  
miscellaneous screw kit, 2-4  
mouse, 2-5  
Network Interface Card, 2-3  
Nvidia graphics card, 2-3  
power supply, 2-1  
processor, 2-3  
mouse  
memory, 4-20  
cleaning, 3-5  
spare part number, 2-5  
specifications, 6-9  
power button, 4-7  
power supply, 4-34  
power switch, 4-9  
processor, 4-29  
subpanel and bezel blanks,  
4-8  
N
return kit, 2-5  
system board, 2-3  
specifications  
Network Interface Card  
spare part number, 2-3  
Nvidia graphics card  
spare part number, 2-3  
system board, 4-31  
required tools and software, 3-5  
retention mechanism, 4-22  
return kit  
CD-ROM, 6-8  
diskette drive, 6-6  
graphics, 6-10  
hard drive, 6-7  
keyboards, 6-9  
spare part number, 2-5  
P
mouse, 6-9  
system, 6-1  
passwords, 5-3  
power button  
removal and replacement,  
4-7  
power supply  
S
subpanel and bezel blanks  
removal and replacement,  
4-8  
system  
specifications, 6-1  
system board  
screws  
using correct, 3-5  
serial number location, 1-5  
service considerations, 3-5  
setup passwords, 5-3  
software  
fan, 3-5  
removal and replacement,  
4-34  
connector locations, 5-1  
connectors and jumpers, 5-1  
removal and replacement,  
4-31  
required, 3-5  
spare part number, 2-1  
power switch  
removal and replacement,  
4-9  
power-on passwords, 5-3  
spare part number, 2-3  
system specifications  
DMA, 6-2  
processor  
removal and replacement,  
4-29  
spare part number, 2-3  
I/O, 6-3  
memory map, 6-5  
T
tools  
required, 3-5  
U
Ultra ATA devices, 4-11  
I-2  
Index  
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