Compaq Personal Computer EP Series User Manual
Maintenance &  
Service Guide  
Compaq Deskpro EP Series  
of Personal Computers  
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Notice  
The information in this guide is subject to change without notice.  
COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR  
TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN;  
NOR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM  
THE FURNISHING, PERFORMANCE, OR USE OF THIS MATERIAL.  
This guide contains information protected by copyright. No part of this guide may be  
photocopied or reproduced in any form without prior written consent from Compaq  
Computer Corporation.  
2000 Compaq Computer Corporation.  
All rights reserved. Printed in the U.S.A.  
Compaq, the Compaq logo, and Deskpro Registered U. S. Patent and Trademark Office.  
PREMIER•SOUND is a trademark of Compaq Computer Corporation.  
Microsoft, MS-DOS, and Windows are registered trademarks of Microsoft Corporation.  
Intel and Pentium are registered trademarks of Intel Corporation.  
MMX and Celeron are trademarks of Intel Corporation.  
Product names mentioned herein may be trademarks and/or registered trademarks of  
their respective companies.  
The software described in this guide is furnished under a license agreement or  
nondisclosure agreement. The software may be used or copied only in accordance with  
the terms of the agreement.  
Maintenance & Service Guide  
Compaq Deskpro EP Series of Personal Computers  
Fourth Edition (June 2000)  
First Edition (July 1999)  
Part Number 134011-004  
Spare Part Number 143685-001  
Compaq Computer Corporation  
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CONTENTS  
preface  
About This Guide  
Symbols and Conventions ........................................................................................................ vii  
Technician Notes ...................................................................................................................... vii  
Locating Additional Documentation ....................................................................................... viii  
chapter 1  
Product Description  
1.1 Model Overview ............................................................................................................. 1-2  
1.2 System Design................................................................................................................. 1-3  
1.3 Preinstalled Software ...................................................................................................... 1-4  
1.3.1 Ordering Additional Software ............................................................................ 1-4  
1.4 Computer Features .......................................................................................................... 1-5  
1.4.1 Front Panel Controls and LEDs - 440BX........................................................... 1-5  
1.4.2 Front Panel Controls and LEDs - Intel 810/810e ............................................... 1-6  
1.4.3 Rear Panel Connectors - 440BX......................................................................... 1-7  
1.4.4 Rear Panel Connectors - Intel 810/810e............................................................. 1-8  
1.4.5 Drive Positions ................................................................................................... 1-9  
1.5 Serial Number Location................................................................................................ 1-10  
chapter 2  
Spare Parts  
2.1 System Unit..................................................................................................................... 2-2  
2.1.1 System Unit - 440BX ......................................................................................... 2-2  
2.1.2 System Unit - Intel 810/810e.............................................................................. 2-4  
2.2 Mass Storage Devices ..................................................................................................... 2-6  
2.3 Cables.............................................................................................................................. 2-8  
2.4 Standard and Optional Boards ...................................................................................... 2-10  
2.5 Keyboards ..................................................................................................................... 2-15  
2.6 Miscellaneous Hardware Kit......................................................................................... 2-16  
2.7 Miscellaneous Plastics Kit ............................................................................................ 2-17  
2.8 Miscellaneous Parts....................................................................................................... 2-18  
2.9 Shipping Boxes ............................................................................................................. 2-19  
2.10 Documentation and Software........................................................................................ 2-19  
chapter 3  
Removal and Replacement Preliminaries  
3.1 Routine Care ................................................................................................................... 3-1  
3.1.1 Cleaning Safety Precautions............................................................................... 3-1  
3.1.2 Cleaning the Computer Case .............................................................................. 3-1  
3.1.3 Cleaning the Keyboard....................................................................................... 3-2  
3.1.4 Cleaning the Monitor.......................................................................................... 3-2  
3.1.5 Cleaning the Mouse............................................................................................ 3-2  
Contents  
iii  
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3.2 Electrostatic Discharge Information................................................................................ 3-3  
3.2.1 Generating Static ................................................................................................ 3-3  
3.2.2 Preventing Electrostatic Damage to Equipment................................................. 3-3  
3.2.3 Personal Grounding Methods and Equipment.................................................... 3-4  
3.2.4 Grounding Workstations..................................................................................... 3-4  
3.2.5 Recommended Materials and Equipment........................................................... 3-4  
3.3 Service Considerations.................................................................................................... 3-5  
3.3.1 Tools and Software Requirements...................................................................... 3-5  
3.3.2 Screws................................................................................................................. 3-5  
3.3.3 Cables and Connectors ....................................................................................... 3-5  
3.3.4 Hard Drives ........................................................................................................ 3-6  
3.3.5 Plastic Parts......................................................................................................... 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 Logo Plate ....................................................................................................................... 4-4  
4.5 Cable Lock...................................................................................................................... 4-5  
4.6 Access Panel ................................................................................................................... 4-7  
4.7 Front Bezel...................................................................................................................... 4-8  
4.8 Power Button................................................................................................................... 4-9  
4.9 Subpanel and Bezel Blanks........................................................................................... 4-10  
4.10 Power Switch ................................................................................................................ 4-11  
4.11 Mass Storage Devices ................................................................................................... 4-12  
4.11.1 Removing an Internal 3.5-Inch Hard Drive...................................................... 4-14  
4.11.2 Removing an External 5.25-Inch Drive............................................................ 4-16  
4.11.3 Removing an External 3.5-Inch Drive.............................................................. 4-18  
4.12 Removing the Drivelocks.............................................................................................. 4-21  
4.13 Expansion Boards ......................................................................................................... 4-24  
4.13.1 440BX .............................................................................................................. 4-24  
4.13.2 Intel 810 and 810e ............................................................................................ 4-25  
4.13.3 Removing an Expansion Board ........................................................................ 4-26  
4.13.4 Installing an Expansion Board.......................................................................... 4-27  
4.14 Board Guide.................................................................................................................. 4-29  
4.15 System Memory ............................................................................................................ 4-30  
4.15.1 440BX .............................................................................................................. 4-30  
4.15.2 Intel 810/810e................................................................................................... 4-30  
4.16 AGP Graphics Board (440BX) ..................................................................................... 4-32  
4.16.1 AGP Graphics Board Removal (440BX).......................................................... 4-32  
4.16.2 Graphics Memory Upgrade (440BX)............................................................... 4-33  
4.17 Processor Components.................................................................................................. 4-34  
4.17.1 Processor........................................................................................................... 4-34  
4.17.2 Processor Guide Rails....................................................................................... 4-37  
4.18 System Board ................................................................................................................ 4-39  
4.19 Internal Speaker ............................................................................................................ 4-40  
4.20 Lithium Battery............................................................................................................. 4-42  
4.21 Fan Assembly................................................................................................................ 4-45  
4.22 Power Supply................................................................................................................ 4-46  
4.23 Converting a Desktop to a Minitower........................................................................... 4-48  
4.24 Converting a Minitower to a Desktop........................................................................... 4-51  
iv  
Contents  
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chapter 5  
Connectors, Jumpers, and Switches  
5.1 System Board .................................................................................................................. 5-1  
5.1.1 Connectors, Jumpers, and Switches.................................................................... 5-1  
5.1.2 Switches.............................................................................................................. 5-4  
5.1.3 Jumpers (440BX)................................................................................................ 5-5  
5.1.4 Jumpers (Intel 810/810e).................................................................................... 5-7  
5.2 Hard Drives................................................................................................................... 5-10  
5.2.1 Using the Cable-Select Feature with Ultra ATA Devices ................................ 5-10  
5.2.2 Drive Jumper Settings ...................................................................................... 5-11  
chapter 6  
Specifications  
6.1 Specifications.................................................................................................................. 6-1  
6.1.1 System ................................................................................................................ 6-1  
6.1.2 Interrupts ............................................................................................................ 6-2  
6.1.3 DMA................................................................................................................... 6-3  
6.1.4 I/O....................................................................................................................... 6-3  
6.1.5 Memory Map...................................................................................................... 6-5  
6.2 Drives.............................................................................................................................. 6-5  
6.2.1 1.44-MB Diskette Drive ..................................................................................... 6-5  
6.2.2 Ultra ATA Hard Drives ...................................................................................... 6-6  
6.2.3 CD-ROM Drives................................................................................................. 6-7  
6.3 Compaq Enhanced Keyboard.......................................................................................... 6-9  
6.4 2-Button Mouse............................................................................................................... 6-9  
6.5 Supported Graphics Resolutions..................................................................................... 6-9  
6.5.1 ATI RAGE PRO TURBO 1X AGP.................................................................... 6-9  
6.5.2 ATI RAGE PRO IIC AGP................................................................................ 6-10  
6.5.3 NVIDIA RIVA 128 AGP ................................................................................. 6-10  
6.5.4 Matrox MGA G100 AGP ................................................................................. 6-10  
6.5.5 Matrox Millenium G200-SD AGP ................................................................... 6-11  
6.5.6 Matrox Millenium G400-SG AGP ................................................................... 6-11  
6.5.7 Integrated Intel 3D Graphics ............................................................................ 6-11  
6.6 Audio Controllers.......................................................................................................... 6-12  
chapter 7  
Service Notes ..................................................................................................................................... 7-1  
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 EP Series of Personal Computers. Only  
authorized technicians trained by Compaq should attempt to repair this equipment.  
Compaq Computer Corporation reserves the right to make changes to 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: The computer is designed to be electrically grounded. To ensure proper operation, plug  
the AC power cord into a properly grounded AC outlet only.  
Compaq Deskpro EP Series of Personal Computers  
vii  
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Locating Additional Documentation  
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 Service Quick Reference Guide  
viii  
About This Guide  
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chapter 1  
PRODUCT DESCRIPTION  
This chapter describes the model offerings and features of Compaq Deskpro EP Series of  
Personal Computers.  
Compaq Deskpro EP Series of Personal Computers  
Compaq Deskpro EP Series of Personal Computers  
1-1  
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1.1  
Model Overview  
Compaq Deskpro EP Series of Personal Computers ship as either desktop or minitower  
models. They contain the unique, flexible Compaq ATX chassis, which allows you to  
easily reconfigure the unit as a minitower by (1) removing the drives from the computer,  
(2) standing the unit on its side, (3) rotating the drives and bezel blanks 90 degrees, then  
(4) reinserting the drives into the drive bays.  
✎
The Compaq Deskpro EP Series, Intel 440BX chipset models will be referred to  
in this MSG as 440BX.  
The Compaq Deskpro EP Series, Intel 810 chipset models will be referred to in  
this MSG as 810 or Intel 810.  
The Compaq Deskpro EP Series, Intel 810e chipset models will be referred to in  
this MSG as 810e or Intel 810e.  
1-2  
Product Description  
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1.2  
System Design  
!
Desktop models of the Compaq Deskpro EP Series of Personal Computers use an  
innovative chassis to house the removable system board, expansion boards, power  
supply, and mass storage devices.  
!
!
Internal components are accessible when the access panel is removed.  
The front bezel is a multi-part assembly that attaches to the chassis with release  
latches. Attached to the back of the front bezel is a subpanel that holds the bezel  
blanks.  
!
!
!
!
The system board may be removed from the chassis after the access panel is  
removed. Details of the disassembly procedure are found in Chapter 4, “Removal  
and Replacement Procedures.”  
The drive bays are located in the front of the chassis; there are two 3.5-inch drive  
bays for internal hard drives and three 5.25-inch drive bays for accessible mass  
storage.  
The chassis design allows drive installation without the use of rails. Guide screws  
installed on each side of the drive ensures its proper alignment within the drive  
bay. Extra guide screws are provided in the front of the chassis.  
The desktop model of this computer may be converted to a minitower  
configuration. See Chapter 4, “Removal and Replacement Procedures,” for  
additional information and instructions.  
Detailed descriptions of the system components are presented in the sections that follow.  
Compaq Deskpro EP Series of Personal Computers  
1-3  
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1.3  
Preinstalled Software  
This computer ships with Windows 95, Windows 98, or Windows NT 4.0 installed as the  
operating system, and also contains the following preloaded software:  
!
!
!
!
!
!
!
!
!
ROM-based Setup utilities  
Compaq Diagnostics for Windows  
Compaq support software and device drivers  
Online Safety & Comfort Guide (English only)  
Intelligent Manageability  
Power Management with Energy Saver features  
Security Management  
Remote Management Tools  
Microsoft Internet Explorer  
1.3.1  
Ordering Additional Software  
If you plan to run any of the following operating systems on the computer, you must  
install the corresponding Compaq device drivers and utilities before attempting to use the  
computer:  
!
!
!
!
IBM OS/2  
NetWare  
Microsoft Windows NT Workstation 3.51 or 4.0  
A version of Microsoft Windows 95 that is different from the one included with  
the computer  
To order copies of suitable device drivers and utilities:  
!
Order the Support Software CD for Compaq Desktop Products. This compact disc  
contains the latest device drivers, utilities, and flashable ROM images needed to  
run MS-DOS, Windows 3.1, Windows 95, Windows NT Workstation 3.51, IBM  
OS/2, and NetWare on the Compaq commercial desktop product.  
!
!
Download the software from the Compaq World Wide Web site  
(www.compaq.com).  
Purchase backup diskettes.  
The Support Software CD can be purchased in either of two ways:  
!
A single CD-ROM that gives one-time access to the latest support software (North  
America only).  
!
A yearly subscription that delivers up to 12 monthly CD-ROMs.  
The annual subscription provides continuous access to the latest developments.  
When calling Compaq to place an order, be sure to have the serial number of the  
computer available. This number is necessary for all purchases.  
✎
1-4  
Product Description  
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1.4  
Computer Features  
Compaq Deskpro EP Series of Personal Computers ship 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.  
1.4.1  
Front Panel Controls and LEDs - 440BX  
Front Panel Controls and LEDs - 440BX  
Ref. Component/Function  
Ref. Component/Function  
Power-On Light  
CD-ROM Volume Control*  
CD-ROM Headphone Jack*  
Dual-State Power Button  
Drive Activity Light**  
1
2
3
4
5
6
7
8
9
Diskette Drive Activity Light  
Diskette Eject Button  
CD-ROM Eject Button*  
CD-ROM Activity Light*  
*CD-ROM models only.  
**Flashes when an ATAPI device, such as the hard drive, is active.  
Compaq Deskpro EP Series of Personal Computers  
1-5  
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1.4.2  
Front Panel Controls and LEDs - Intel 810/810e  
Front Panel Controls and LEDs - Intel 810/ 810e  
Ref. Component/Function  
Ref. Component/Function  
Power-On Light  
CD-ROM Drive Busy Indicator*  
Headphone Volume Control  
Stereo Headphone Jack  
Dual-State Power Button  
Drive Activity Light**  
1
2
3
4
5
6
7
8
9
:
Diskette Drive Activity Light  
Diskette Eject Button  
Serial Number  
CD-ROM Eject Button*  
*CD-ROM models only.  
**Flashes when an ATAPI device, such as the hard drive, is active.  
1-6  
Product Description  
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1.4.3  
Rear Panel Connectors - 440BX  
Rear Panel Connectors - 440BX  
Ref. Component  
Component  
Power Cord Connector  
Serial Connectors (2)  
1
7
8
Voltage Select Switch (switches  
voltage between 115V and 230V to  
match geographical requirements)  
Monitor Connector  
2
Universal Serial Bus (USB)  
Headphone Connector*  
3
9
Connectors (2) (connects the  
computer to any USB peripheral while  
the computer is operating; is a fully  
functional plug and play connector)  
Keyboard Connector  
Mouse Connector  
Line-Out Audio Connector*  
Line-In Audio Connector*  
Microphone Connector *  
:
;
<
4
5
6
Parallel Port Connector  
*Audio features are available on select models only.  
Compaq Deskpro EP Series of Personal Computers  
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1.4.4  
Rear Panel Connectors - Intel 810/810e  
Rear Panel Connectors - Intel 810/810e  
Ref. Component  
Ref. Component  
Power Cord Connector  
Headphone Connector  
1
2
8
9
Voltage Select Switch (switches  
voltage between 115V and 230V to  
match geographical requirements)  
Line-Out Audio Connector  
Universal Serial Bus (USB)  
Connectors (2) (connects the  
computer to any USB peripheral  
while the computer is operating; is  
a fully functional plug and play  
connector)  
Serial Number  
3
:
Serial Connectors  
Keyboard Connector*  
Mouse Connector*  
Monitor Connector  
Line-In Audio Connector  
Microphone Connector  
Parallel Port Connector  
4
5
6
7
;
<
=
*Keyboard and mouse ports are interchangeable  
1-8  
Product Description  
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1.4.5  
Drive Positions  
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  
Compaq Computer Setup.  
Compaq Deskpro EP Series of Personal Computers  
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1.5  
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.  
Serial Number Locations  
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.  
1-10  
Product Description  
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chapter  
2
SPARE PARTS  
Compaq Deskpro EP Series of Personal Computers  
.
The Compaq Deskpro EP Series, Intel 440BX chipset models will be referred to  
in this MSG as 440BX.  
The Compaq Deskpro EP Series, Intel 810 chipset models will be referred to in  
this MSG as 810 or Intel 810.  
The Compaq Deskpro EP Series, Intel 810e chipset models will be referred to in  
this MSG as 810e or Intel810e.  
Compaq Despro EP Series of Personal Computers  
2-1  
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2.1  
System Unit  
2.1.1 System Unit - 440BX  
System Unit Spare Parts - 440BX Model  
2-2  
Spare Parts  
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System Unit Spa re Pa rts - 440BX  
Description  
Spare Part Number  
166867-001  
1
2
3
3
4
5
6
7
Access panel  
Front bezel, complete with subpanel and bezel blanks  
166868-001  
Power supply, 200 Watt  
166814-001  
Power supply, 145 Watt  
332863-001  
Logo Kit, Deskpro EP (1 ea., DT and MT)  
Feet  
166924-001  
Miscellaneous Plastics  
166925-001  
Power switch with cable, LED and switch holder (3 ea.)  
Chassis/basepan (repair/exchange only)  
166880-001  
Ma jor Differences Between 440BX a nd Intel 810/810e  
System  
Board  
Assembly  
Power  
Supply  
145 Watt  
Power  
Supply  
200 Watt Panel  
Diskette  
Drive  
Assembly Cable  
Access  
Chassis  
440BX, PII,  
two-DIMM model,  
332857-001  
332863-001 166814-001 166867-001 166880-001 166838-001  
332863-001 166814-001 166867-001 166880-001 166838-001  
332863-001 166814-001 166867-001 166880-001 166838-001  
(PCA 008312-101)  
440BX, PII,  
three-DIMM model,  
166813-001  
(PCA 009635-101)  
440BX, PII/PIII,  
three-DIMM model  
118053-001  
(PCA 010233-101)  
Date code of  
X908XXXXXXXX or later  
440BX, PIII  
332863-001 166814-001 166867-001 166880-001 166838-001  
three-DIMM model  
164483-001  
(PCA 010582-101)  
Intel 810, Celeron  
401963-001  
(PCA 010174-101)  
n/a  
n/a  
103748-001 137384-001 Not spared 143218-001  
103748-001 137384-001 Not spared 143218-001  
Intel 810e, Celeron  
164122-001  
(PCA 010546-101)  
Intel 810e, Celeron  
187672-001  
174871-001 n/a  
137384-001 Not spared 143218-001  
(PCA 010697-101)  
Compa q Despro EP Series of Persona l Computers  
2-3  
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2.1.2 System Unit - Intel 810/810e  
System Unit Spare Parts - Intel 810/810e Model  
2-4  
Spare Parts  
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System Unit Spa re Pa rts - Intel 810/810e  
Description  
Spare Part Number  
1
2
3
*
Access panel (includes gasket)  
137384-001  
Front bezel, complete with subpanel and bezel blanks  
Power supply, 200W  
166868-001  
103748-001  
Power supply, 145W (only used with PCA 010697-101)  
Logo Kit, Deskpro EP (1 ea., DT and MT)  
Feet  
174871-001  
4
5
6
166924-001  
Miscellaneous Plastics  
Not spared  
Chassis/basepan (repair/exchange only)  
*Not Shown  
Ma jor Differences Between 440BX a nd Intel 810/810e  
System  
Board  
Assembly  
Power  
Supply  
145 Watt  
Power  
Supply  
200 Watt Panel  
Diskette  
Drive  
Assembly Cable  
Access  
Chassis  
440BX, PII,  
two-DIMM model,  
332857-001  
332863-001 166814-001 166867-001 166880-001 166838-001  
332863-001 166814-001 166867-001 166880-001 166838-001  
332863-001 166814-001 166867-001 166880-001 166838-001  
(PCA 008312-101)  
440BX, PII,  
three-DIMM model,  
166813-001  
(PCA 009635-101)  
440BX, PII/PIII,  
three-DIMM model  
118053-001  
(PCA 010233-101)  
Date code of  
X908XXXXXXXX or later  
440BX, PIII  
332863-001 166814-001 166867-001 166880-001 166838-001  
three-DIMM model  
164483-001  
(PCA 010582-101)  
Intel 810, Celeron  
401963-001  
(PCA 010174-101)  
n/a  
n/a  
103748-001 137384-001 Not spared 143218-001  
103748-001 137384-001 Not spared 143218-001  
Intel 810e, Celeron  
164122-001  
(PCA 010546-101)  
Intel 810e, Celeron  
187672-001  
174871-001 n/a  
137384-001 Not spared 143218-001  
(PCA 010697-101)  
Compa q Despro EP Series of Persona l Computers  
2-5  
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2.2  
Mass Storage Devices  
Mass Storage Devices  
2-6  
Spare Parts  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Mass Storage Devices  
Description  
2.1-GB Ultra ATA hard drive (33/5400)  
3.2-GB Ultra ATA hard drive (33/5400)  
Spare Part Number  
332861-001  
1
*
*
*
*
*
*
*
*
*
*
*
*
*
2
332866-001  
4.3-GB Ultra ATA hard drive (33/5400)  
4.3-GB Ultra ATA hard drive (66/5400)  
5.1-GB Ultra ATA hard drive (33/5400)  
6.4-GB Ultra ATA hard drive (33/5400)  
6.4-GB Ultra ATA hard drive (66/5400)  
10.0-GB Ultra ATA hard drive (33/5400)  
10.0-GB Ultra ATA hard drive (66/7200)  
10.0-GB Ultra ATA hard drive (66/5400)  
13.5-GB Ultra ATA hard drive (66/7200)  
15.0-GB Ultra ATA hard drive (33/7200)  
20.0-GB Ultra ATA hard drive (33/7200)  
22.6-GB Ultra ATA hard drive (33/7200)  
327646-001  
134197-001  
166872-001  
166973-001  
134198-001  
320662-001  
135364-001  
134193-001  
140515-001  
120419-001  
120420-001  
388511-001  
179161-001  
Diskette drive, 3.5-inch (141087-705), 1.44-MB, 3-mode, 1/3-  
height, without bezel, includes drive bay adapter (179026-002)  
*
3
*
*
*
*
*
Diskette drive adapter  
180808-001  
166869-001  
327659-001  
400807-001  
120696-001  
134195-001  
134196-001  
24X Max tray load IDE CD-ROM drive  
32X Max tray load IDE CD-ROM drive  
40X Max tray load IDE CD-ROM drive  
52X Max tray load IDE CD-ROM drive  
60X Max tray load IDE CD-ROM drive  
8X DVD Drive  
*Not shown  
(nn/nnnn) = hard drive transfer rate (MBytes/sec)/RPM  
.
The increased speed of the Ultra ATA/66 drive is realized only on the Deskpro  
EP Intel 800 series.  
Ultra ATA/66 hard drives are backwards compatible with Ultra ATA/33 devices;  
however, the data transfer rate is reduced to 33MB/sec.  
Compaq Despro EP Series of Personal Computers  
2-7  
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2.3  
Cables  
Cables  
2-8  
Spare Parts  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Cables  
Description  
Cable Kit includes:  
Diskette drive cable without twist, 11”  
Spare Part Number  
166879-001  
1a  
440BX only, (166838-001)  
1b  
*
Audio cable, 21”, (288489-002)  
IDE hard drive cable, 7”  
440BX only, (247116-001)  
*
IDE hard drive/CD-ROM cable, 14”  
440BX only, (242947-001)  
Cable Kit (use on Intel 800 series products) includes: 166879-002  
2a  
*
Diskette drive cable with twist, 11”, with pull tab,  
center polarization (143218-001)  
IDE Ultra ATA hard drive/CD-ROM cable, 10”, with pull tab,  
center polarization, (108950-007)  
*
*
*
*
Switch mounting bracket (3 ea.), (166777-001)  
Dual-LED power cable (1 ea.), (387727-001)  
40-position data cable, 12.5” (105876-001)  
Diskette drive/tape cable, with twist, no key, 34”  
Opt. (356107-001)  
*
*
RTF card for EP diskette drive cable (157354-001)  
Diskette drive cable with twist, 11”, without pull tab  
(387795-001)  
3
4
*
Cable, IDE CD-ROM/hard drive, 14-inch, 80-conductor  
Power cord, AC, black (US, LA, Asia/Pacific, Brazil)  
NIC Remote Wakeup cable  
278296-001  
142766-001  
166974-001  
166925-001  
*
Power switch with cable and switch mounting bracket  
(440BX and 810e PCA=010697-101 only) (3 ea.)  
*
*
Audio cable, 25”.  
Use with Creative Labs SoundBlaster PCI 128V Audio Board.  
149806-001  
305717-001  
Video cable for P1610W color monitor  
*Not shown  
Compaq Despro EP Series of Personal Computers  
2-9  
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2.4  
Standard and Optional Boards  
Standard and Optional Boards  
2-10  
Spare Parts  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Sta nda rd a nd Optiona l Boa rds  
Description  
Spare Part Number  
1a PII System board, three-DIMM model (440BX)  
(PCA=009635-101).  
166813-001  
1b PII System board, two-DIMM model (440BX)  
(PCA=008312-101).  
332857-001  
118053-001  
PII/PIII System board, three-DIMM model (440BX)  
*
(PCA=010233-101) Shipped on all PII and PIII units after 2/23/99).  
1c Intel 810 System Board (PCA=010174-101).  
401963-001  
161422-001  
187672-001  
164483-001  
*
*
*
Intel 810e System Board (PCA=010546-101).  
Intel 810e System Board (PCA=010697-101).  
PIII System board, three-DIMM model (440BX)  
(PCA=010582-101).  
2b Processor, Intel Celeron 266/66 w/heatsink. Use on 2-DIMM board). 332858-001  
Processor, Celeron 300A/66 w/heatsink.  
356136-001  
356082-001  
103253-001  
402126-001  
103747-001  
*
*
*
*
Processor, Celeron 333/66 w/heatsink.  
Processor, Celeron 366/66 w/28K cache, heatsink.  
Processor, Celeron 400/66 w/128K cache, heatsink.  
2c Processor, Celeron 466/66 (includes heatsink, clip, and  
thermal crayon). Use on 010174-101 system board.  
*
Processor, Celeron 466/66 (401264-006), w/heatsink, clip, and  
thermal interface. Use on 010697-101 system board.  
176740-001  
155379-001  
176741-001  
Processor, Celeron 500/66 w/heatsink. Use on 010174-101  
system board.  
*
*
Processor, Celeron 500/66 (401264-007), w/heatsink, clip, and  
thermal interface). Use on 010697-101 system board.  
Processor, PII 266/66 w/heatsink.  
332862-001  
166881-001  
166887-001  
166874-001  
166882-001  
167032-001  
122735-001  
*
*
*
Processor, PII 300/66 w/heatsink. Use on 2-DIMM board.  
Processor, PII 333/66 w/heatsink.  
2a Processor, PII 350/100 w/heatsink. Use on 3-DIMM board.  
Processor, PII 400/100 w/heatsink. Use on 3-DIMM board.  
Processor, PII 450/100 w/heatsink.  
*
*
*
Processor, PIII, 450/100 (352772-004) w/heatsink (401405-001)  
and thermal compound (243199-002). Use on 010233-101 system  
board.  
Processor, PIII, 450/100 (352772-004) w/heatsink (401405-003),  
keyed heatsink clip (120891-001), and retention mechanism  
(350767-005). Use on 010546-101 system board.  
164400-001  
116401-001  
*
*
*
*
Processor, PIII, 500/100 (352772-005) w/heatsink (401405-001),  
and thermal compound (243199-002). Use on 010233-101  
system board.  
Processor, PIII, 500/100 (352772-005), w/heatsink (401405-003), 164401-001  
keyed heatsink clip (120891-001), and retention mechanism  
(350767-005). Use on 010546-101 system board.  
Processor, PIII, 500/100 (158353-001), w/heatsink, clip, and thermal176742-001  
interface. Use on 010697-101 system board.  
*Not shown  
Continued  
#
2-11  
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Standard and Optional Boards, continued  
2-12  
Spare Parts  
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Standard and Optional Boards Continued  
Description  
Spare Part Number  
164402-001  
Processor, PIII, 533/133, (137365-003), w/heatsink (401405-003),  
keyed heatsink clip (120891-001), spacer (168092-001), retention  
mechanism (350767-005). Use on 010546-101 system board.  
*
133840-001  
176743-001  
Processor, PIII, 550/100 (352772-006), w/heatsink (401405-001),  
and thermal compound (243199-002). Use on 010233-101 system  
board.  
*
Processor, PIII, 550/100 (158353-002), w/heatsink, clip, and thermal  
interface. Use on 010697-101 system board.  
*
*
Processor, PIII, 600/133, (137365-001), w/heatsink (401405-003), 164403-001  
keyed heatsink clip (120891-001), spacer (168092-001), retention  
mechanism (350767-005). Use on 010546-101 system board.  
176744-001  
155592-001  
164568-001  
Processor, PIII, 600/133 (158807-002), w/heatsink, clip,  
and thermal interface. Use on 010697-101 system board.  
*
*
*
Processor, PIII, 600/100, (352772-007), w/heatsink (135638-001).  
Use on 010233-101 system board.  
Processor, PIII, 650/100 (157381-002), w/heatsink (401405-003),  
keyed heatsink clip (120891-001, spacer (168092-001), retention  
mechanism (350767-005). Use on 010582-101 system board.  
*
*
161671-001  
164568-001  
Processor, PIII, 667/133, (137365-002), w/heatsink (401405-003),  
keyed heatsink clip (120891-001, spacer (168092-001), retention  
mechanism (350767-005). Use on 010546-101 system board.  
Processor, PIII, 700/100 (157381-004), w/heatsink (401405-003),  
keyed heatsink clip (120891-001, spacer (168092-001), retention  
mechanism (350767-005). Use on 010582-101 system board.  
3
Memory Module, DIMM, 66 MHz  
16-MB  
278066-001  
278067-001  
278095-001  
*
*
*
32-MB  
64-MB  
Memory Module, DIMM, 66 MHz with ECC  
16-MB  
278097-001  
288440-001  
278098-001  
278099-001  
32-MB  
64-MB  
128-MB  
*
*
Memory Module, DIMM, 100 MHz  
16-MB  
166969-001  
166890-001  
179190-001  
166966-001  
32-MB  
64-MB  
128-MB  
Memory Module, DIMM, 100 MHz with ECC  
16-MB  
32-MB  
64-MB  
128-MB  
166964-001  
166968-001  
166967-001  
166965-001  
Compaq Despro EP Series of Personal Computers  
2-13  
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Standard and Optional Boards Continued  
Description  
Spare Part Number  
4
*
*
*
*
ATI RAGE PRO GRAPHICS 1X  
166871-001  
ATI RAGE PRO GRAPHICS 2X  
166970-001  
332865-001  
328011-001  
ATI RAGE PRO GRAPHICS IIC  
Matrox MGA G100 AGP graphics board  
Matrox Millenium G200-SD graphics card with 8-MB memory  
(shipped on all PII and PIII units after 2/23/99)  
402125-001  
Matrox Millenium G200-SD graphics card with 8-MB memory  
Matrox Millenium G400 graphics card with 16-MB memory  
33.6k Modem  
*
*
167033-001  
400437-001  
294912-001  
292269-003  
5
56k Modem  
*
6
7
NVIDIA Graphics  
166982-001  
166971-001  
166972-001  
ATI Graphics memory upgrade, 2-MB for use on 166871-001  
ATI Graphics memory upgrade, 4-MB for use on 166970-001  
*
8
ESS 1869 ISA Audio Board (440BX). Use on speaker 166507-001 332859-001  
167984-001  
Creative Labs SoundBlaster PCI 128V Audio Board with Compaq  
*
PREMIER· SOUND (440BX)  
Shipped on 440BX units with Windows 98 or Windows NT 4.0 and  
·
·
PIII 650/100 and 700/100 starting 11/15/99  
PIII 500-MHz and greater starting 11/17/99  
Compaq 10/100 TX PCI Intel WOL UTP w/Remote Wakeup cable 323553-001  
*
*
*
3-COM PCI, 10/100 WOL  
179167-001  
356081-001  
Compaq PREMIER· SOUND board  
(for use with speaker 167029-001)  
*Not shown  
2-14  
Spare Parts  
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2.5  
Keyboards  
Keyboards  
Description  
Spare Part Number  
269513-171  
*
*
*
*
Arabic  
Belgian  
Brazilian  
269513-181  
269513-201  
BHCSY (Bosnia-Herzegovina, Croatia, Slovenia, and  
Yugoslavia)  
269513-B41  
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
Czech  
269513-221  
269513-081  
269513-351  
269513-051  
269513-121  
269513-041  
269513-151  
269513-211  
269513-061  
269513-191  
269513-AD1  
269513-B31  
166984-161  
269513-091  
269513-241  
269513-131  
269513-251  
269513-231  
269513-071  
269513-101  
269513-111  
269513-AB1  
269513-281  
269513-141  
269513-031  
166984-001  
Danish  
Finnish  
French  
French Canadian  
German  
Greek  
Hungarian  
Italian  
Japanese  
Korean (Hanguel)  
International  
Latin American Spanish  
Norwegian  
Polish  
Portuguese  
Russian  
Slovakian  
Spanish  
Swedish  
Swiss  
Taiwanese  
Thai  
Turkish  
UK  
US  
*Not shown  
Compaq Despro EP Series of Personal Computers  
2-15  
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2.6  
Miscellaneous Hardware Kit  
Miscellaneous Hardware Kit  
Miscellaneous Hardware  
Description  
Spare Part Number  
166877-001  
Miscellaneous hardware kit. Includes:  
1
Cover, slot (5 ea.) (101144-001)  
2a I/O Panel for 440BX (166802-002)  
2b I/O Panel for Intel 810/810e (123556-001)  
*
3
4
5
*
I/O Panel for Intel 810e – PCA=010697-101 (166808-002)  
Fan guard (105427-003)  
Screw, 6/32 pan head x 1/4 inch (4 ea.) (192308-001)  
Thumbscrew (2 ea.) (440BX) (197436-001)  
Thumbscrew (2 ea.) (Intel 810/810e) (124702-001)  
Screw, M3 x 0.25 inch (4 ea.) (247348-001)  
Plastite flathead screw (4 ea.) (247481-001)  
Plastic push lock fastener for fan assy (4 ea.) (118663-002)  
Bracket (270886-002), blank, AGP  
6
*
*
*
*
Gasket (247347-072)  
(for use on 101144-001 slot cover inserted in 7th slot)  
*
Gasket (304477-037)  
(for use on Intel 810 access panel, 137384-001)  
*Not shown  
2-16  
Spare Parts  
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2.7  
Miscellaneous Plastics Kit  
Miscellaneous Plastics Kit  
Miscellaneous Plastics Kit, Desktop and Minitower  
Description  
Spare Part Number  
166878-001  
Miscellaneous plastics kit includes:  
1
2
3
Diskette bezel (166776-001)  
Foot, rubber (4 ea.) (166939-002)  
Processor retainer with pins for PII processor (166889-002)  
(No longer included in kit)  
4
*
Processor retainers with pins for Celeron processor (2 ea.)  
(332816-001) (No longer included in kit)  
Processor retainer for PII and Celeron processor  
(350767-001)  
5
6
7
8
9
Bezel, blank (2 ea.) (166775-001)  
Panel, sub (166835-001)  
Button, power (166774-001)  
Spring, power button (166837-001)  
Drivelock, DT (166779-001)  
10 Drivelock, MT (166780-001)  
11 Springs, drivelock (2 ea.) (166837-002)  
12 Board guide (166778-001)  
*Not shown  
Compaq Despro EP Series of Personal Computers  
2-17  
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2.8  
Miscellaneous Parts  
Miscellaneous Parts  
Miscellaneous Parts  
1
*
Two-button mouse  
Compaq Intellimouse  
Cable lock bracket  
Battery (440BX)  
166861-001  
317863-001  
199109-001  
234556-001  
153099-001  
2
3
*
Battery (Intel 810)  
(for use on system board 401963-001)  
4
Fan assembly with four plastic pins (for use on Pentium II units 166922-001  
450/100 and above and all Pentium III units 450/100 and above)  
*
Chassis fan cover  
166847-001  
167029-001  
5a Speaker with screws (50mm x 90mm, 5 watt)  
(440BX) (for use on audio board 356081-001)  
5b Speaker with screws (2.5”, 5 watt) (440BX)  
(for use on audio board 332859-001)  
166507-001  
*
*
Speaker (40mm x 70mm), (Intel 810) (356080-002)  
Speaker (40mm x 70mm), (Intel 810e) (174920-001)  
158267-001  
180809-001  
166925-001  
6
Power switch with cable and switch mounting bracket  
(440BX only), (3 ea.)  
7
3.5- to 5.25-Inch diskette drive mounting bracket with screws  
and brace for use in bay 3 only. (440BX only)  
166923-001  
*
*
3.5- to 5.25-Inch hard drive mounting bracket  
243231-001  
243230-002  
3.5- to 5.25-Inch ½ height mounting bracket for use in bays  
1 and 2 only  
*Not shown  
2-18  
Spare Parts  
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2.9  
Shipping Boxes  
Shipping Boxes (not illustrated)  
Description  
Spare Part Number  
166990-001  
Return Kit with buns (U.S.)  
Return Kit (international)  
166990-002  
2.10 Documentation and Software  
Documentation and Software (not illustrated)  
Description  
Spare Part Number  
180999-001  
Maintenance & Service Guide (desktop & minitower)  
Deskpro Service Reference Guide  
Windows 98 Country Kit  
152611-001  
165534-001  
Windows 95 Country Kit  
165535-001  
Windows NT Country Kit  
165536-001  
Compaq Despro EP Series of Personal Computers  
2-19  
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chapter 3  
REMOVAL AND REPLACEMENT PRELIMINARIES  
3.1  
Routine Care  
3.1.1  
Cleaning Safety Precautions  
! Never use solvents or flammable solutions to clean the computer.  
! Never immerse any parts in water or cleaning solutions; apply any liquids to a  
clean cloth and then use the cloth on the component.  
! Always turn off the computer when cleaning with liquids or damp cloths.  
! Always turn off the computer before cleaning the keyboard, mouse, or air vents.  
! Disconnect the keyboard before cleaning it.  
! Wear safety glasses equipped with side shields when cleaning the keyboard.  
3.1.2  
Cleaning the Computer Case  
Follow all safety precautions in Section 3.1.1 before cleaning the computer.  
! 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.  
Compaq Deskpro EP Series of Personal Computers  
3-1  
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3.1.3  
Cleaning the Keyboard  
Follow all safety precautions in Section 3.1.1 before cleaning the keyboard.  
To clean the tops of the keys or the keyboard body, follow the procedures described in  
Section 3.1.2.  
When cleaning debris from under the keys, review all rules in Section 3.1.1 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 dampened with isopropyl alcohol.  
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.  
3.1.4  
3.1.5  
Cleaning the Monitor  
! Wipe the monitor screen with a clean cloth moistened with water or with a towlette  
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 3.1.2.  
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 Section 3.1.2.  
3-2  
Removal and Replacement Preliminaries  
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3.2  
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.  
3.2.1  
Generating Static  
The following table shows that different activities generate different amounts of static  
electricity, and that static electricity increases as humidity decreases.  
✎
700 volts can degrade a product.  
Relative Humidity  
Event  
10%  
35,000 V  
12,000 V  
6,000 V  
40%  
15,000 V  
5,000 V  
800 V  
55%  
7,500 V  
3,000 V  
400 V  
Walking across carpet  
Walking across vinyl floor  
Motions of bench worker  
Removing DIPs* from plastic tube  
Removing DIPs* from vinyl tray  
Removing DIPs* from Styrofoam  
Removing bubble pack from PCB  
Packing PCBs in foam-lined box  
2,000 V  
700 V  
400 V  
11,500 V  
14,500 V  
26,500 V  
21,000 V  
4,000 V  
5,000 V  
20,000 V  
11,000 V  
2,000 V  
3,500 V  
7,000 V  
5,000 V  
*Dual Inline Packaging (DIP) is the packaging around individual microcircuitry. These are then  
multi-packaged inside plastic tubes, trays, or Styrofoam.  
3.2.2  
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.  
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3.2.3  
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  
1,500  
Antistatic plastic  
Carbon-loaded plastic  
Metallized laminate  
7,500  
15,000  
3.2.4  
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.  
! 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.  
3.2.5  
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  
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! 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  
3.3  
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  
Tools and Software Requirements  
! Compaq screwdriver with 8 bits, spare part number 161946-001  
! Diagnostics software  
3.3.2  
3.3.3  
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.  
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, twisting, or tearing 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.  
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3.3.4  
3.3.5  
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.  
! Use only the packaging provided by Compaq for shipping.  
! 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.  
Plastic Parts  
Plastic parts can be damaged by the use of excessive force during disassembly and  
reassembly. When handling the plastic parts, use care.  
3-6  
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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  
4.6  
Computer Feet  
Logo Plate  
Cable Lock  
Access Panel  
4.7  
Front Bezel  
4.8 Power Button  
4.9Subpanel and  
4.10 Power Switch  
Bezel  
Blanks  
4.11.1 Removing an Internal 3.5-Inch Hard Drive  
4.11.2 Removing an External 5.25-Inch Drive  
4.11.3 Removing an External 3.5-Inch Drive  
4.12  
4.13.3 Removing an Expansion Board  
4.14 Board Guide  
System Memory  
Removing the Drivelocks  
4.15  
4.16.1 AGP Graphics Board Removal  
4.16.2 AGP Graphics Memory Upgrade  
4.17.1 Processor  
4.17.2 Processor Guide Rails  
4.18  
4.19Internal  
System Board  
Speaker  
4.20  
4.21  
4.22  
4.23  
4.24  
Lithium Battery  
Fan Assembly  
Power Supply  
Converting a Desktop to a Minitower  
Converting a Minitower to a Desktop  
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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.”  
✎
The Compaq Deskpro EP Series, Intel 440BX chipset models will be referred to  
in this MSG as 440BX.  
The Compaq Deskpro EP Series, Intel 810 chipset models will be referred to in  
this MSG as 810 or Intel 810.  
The Compaq Deskpro EP Series, Intel 810e chipset models will be referred to  
in this MSG as 810e or Intel 810e.  
4-2  
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4.3  
Feet Installation  
Eight (8) 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 feet from the backing before installation.  
If necessary, remove the old feet and remove any adhesive residue from the chassis by  
rubbing with your finger or a dry cloth.  
Installing the Feet  
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4.4  
Logo Plate  
Grasp the open side of the logo plate (left side if a desktop, bottom if a minitower) and  
pull outward 2.  
To install a new logo plate, align the guide pins in the slots 1, then press into place.  
When replacing the logo plate, ensure that the alignment pins are properly placed  
in the front bezel before pressing the logo plate into position.  
✎
Replacing the Compaq Logo Plate  
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4.5  
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.  
Installing the Cable Lock Provision - 440BX  
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Installing the Cable Lock Provision - Intel 810/810e  
To remove the cable lock provision, reverse the above procedure.  
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4.6  
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. Remove (440BX) or loosen (Intel 810/810e) the two screws 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.  
Removing the Access Panel - 440BX  
Removing the Access Panel - Intel 810/810e  
To replace the access panel, reverse the previous steps.  
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4.7  
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. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.6).  
4. Press the two release tabs 1 at the top of the front bezel.  
5. Rotate the front bezel away from the chassis 2 to remove it from the unit.  
Removing the Front Bezel  
✎
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.  
4-8  
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4.8  
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 4.6).  
4. Remove the front bezel (Section 4.7).  
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.  
Removing the Power Button  
To replace the power button, reverse the above procedure.  
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4.9  
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, or if you are converting the unit from a desktop to  
a minitower configuration or from a minitower to a desktop configuration.  
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 4.6).  
4. Remove the front bezel (Section 4.7).  
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.  
Removing the Subpanel and Bezel Blanks  
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.  
4-10  
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4.10  
Power Switch  
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 4.6).  
4. Remove the front bezel (Section 4.7).  
5. Disconnect the power/LED cable from the system board 1.  
6. Push the release tab 2 toward the drive bays, then remove the power switch assembly  
from the chassis.  
Disconnecting the Power Switch  
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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4.11  
Mass Storage Devices  
The Compaq Deskpro EP Series of Personal Computers support up to five drives in  
various configurations.  
Drive Bay Locations  
Drive Positions  
Reference Drive Bay  
Configuration  
1, 2  
3
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.  
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.  
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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4.11.1 Removing an Internal 3.5-Inch Hard 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. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.6).  
4. Remove the front bezel (Section 4.7).  
5. Disconnect the power 1 and data 2 cables from the back of the hard drive.  
Disconnecting the Cables  
6. Press the drivelock mechanism to unlock the hard drives. Drivelock 1 secures the  
external drives in the desktop configuration; drivelock 2 secures all drives in the  
minitower configuration and the internal drives in the desktop configuration.  
Unlocking the Drives  
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7. While holding the drivelock in the unlocked position, remove the drive from the  
drive bay.  
Removing an Internal 3.5-Inch Hard Drive  
8. Remove the four guide screws from the drive.  
9. Install two guide screws on each side of the replacement drive.  
Metric screws (M3) have a black finish while U.S. screws 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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4.11.2 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. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.6).  
4. Remove the front bezel (Section 4.7).  
5. If this is a desktop, push down on drivelock 1 to release the drive; if a minitower, press  
drivelock 2.  
Releasing the Drives  
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6. While the drivelock is held in the unlatched position, remove the drive from the  
drivebay.  
7. Remove the four guide screws from the drive 1.  
Removing an External 5.25-inch Drive  
To install a new drive:  
1. Install two guide screws on each side of the replacement drive 1.  
2. Ensure that the guide screws line up with the guide slots 2, then 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 4.9).  
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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4.11.3 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 (spare part number 243230-002).  
If you are installing a 3.5-inch diskette drive into 5.25-inch bay #3, you must use a special  
adapter bracket (spare part number 2166923-001).  
If installing a second ATA hard drive on the primary controller, you must use an 80-  
conductor ATA cable for optimal performance (spare part number 278296-001).  
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. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.6).  
4. Remove the front bezel (Section 4.7).  
The primary diskette drive is always installed in drive bay 3.  
✎
5. If this is a desktop, push down on drivelock 1 to release the drives; if a minitower,  
press drivelock 2.  
Releasing the Drives  
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6. While the drivelock is held in the unlatched position, remove the drive from the  
drive bay.  
Removing a 3.5-inch Drive and Drive Adapter from a 5.25-inch External Drive Bay  
7. Remove the bracket brace 1 from the top of the drive adapter by squeezing inward on  
both sides 2, then rotating the brace up and out.  
8. Remove the drive bezel 3.  
9. Remove the two screws that secure the drive to the left side of the drive adapter.  
10. Slide the drive to the rear of the drive adapter until the diskette drive eject button is free  
of the button protector, then lift the drive out of the drive adapter.  
11. Remove the guide screw from the right side of the drive.  
Removing a 3.5-inch Drive from the 5.25-inch Drive Adapter  
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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 and the topmost bay in the desktop configuration.  
When replacing the drive, use the existing screws. Metric screws (M3) have a  
black finish while U.S. screws (#6) have a silver finish.  
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.  
4-20  
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4.12  
Removing the Drivelocks  
The computer chassis contains two drivelock mechanisms. Drivelock 1 secures the  
external drives in the desktop configuration, drivelock 2 secures all drives in the  
minitower and the internal drives in the desktop configuration.  
Drivelock Mechanism  
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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 4.6).  
4. Remove the front bezel (Section 4.7).  
5. Remove all of the drives from the computer (Sections 4.11.1, 4.11.2, and 4.11.3).  
6. While standing at the rear of the unit, push the top drivelock assembly toward the front  
of the drive cage.  
7. Lift up on the side of the drivelock mechanism nearest you, snapping the tabs out of the  
holes in the drive cage.  
CAUTION: The spring contained under the drivelock mechanism may pop out unexpectedly.  
8. Remove the drivelock from the drive cage.  
9. Remove the spring from the drivelock (see inset).  
Removing the Drivelock Mechanism  
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10. Press in on the tabs to release the vertical drivelock from the chassis, then lift it up and  
out of the system while at the same time rotating the drivelock slightly to clear the  
travel slots at the bottom of the drivelock.  
11. Remove the spring from the post (see inset).  
Removing the Vertical Drivelock  
To reinstall the vertical drivelock, reverse the previous procedure.  
To reinstall the horizontal drivelock:  
1. Insert the left side of the drivelock (with the rounded tabs) into the slots on the drive  
cage.  
2. Place the washer on the middle tab on the underside of the drivelock.  
3. Compress the spring, then lower the drivelock onto the drive cage until it snaps into  
place.  
Reinstalling the Drivelocks  
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4.13  
Expansion Boards  
4.13.1 440BX  
Deskpro EP Expansion Slots - 440BX (2-DIMM Model)  
Deskpro EP Expansion Slots - 440BX (3-DIMM Model)  
1
ISA expansion slots  
2
ISA/PCI shared expansion slots  
3
PCI expansion slots  
4
AGP graphics slot  
4-24  
Removal and Replacement Procedures  
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4.13.2 Intel 810 and 810e  
Deskpro EP Expansion Slots - Intel 810  
Deskpro EP Expansion Slots - Intel 810e  
1
ISA expansion slot  
2
ISA/ISA shared expansion slots  
3
PCI expansion slots  
Your 810e system board may differ from the one shown.  
✎
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4.13.3 Removing an 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 4.6).  
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.  
Removing the Expansion Board  
4-26  
Removal and Replacement Procedures  
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4.13.4 Installing an 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 4.6).  
4. If you are installing an expansion board for the first time, remove the expansion slot  
cover.  
Removing the Expansion Board 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.  
Installing an Expansion Board  
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.  
✎
8. Reassemble the computer.  
The computer should automatically recognize the added plug and play board.  
4-28  
Removal and Replacement Procedures  
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4.14  
Board Guide  
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 4.6).  
4. Remove any full-length expansion boards (Section 4.13.3).  
5. Push down on the two tabs on the top of the board guide.  
6. While holding the tabs down, remove the guide from the chassis.  
Removing the Board Guide  
To replace the board guide, reverse the above procedures.  
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4.15  
System Memory  
4.15.1 440BX  
The 440BX comes with at least 16 megabytes of synchronous dynamic random access  
memory (SDRAM) dual inline memory modules (DIMMs), upgradeable to 256 or 384  
MB. The memory sockets on the system board can be populated with 16-, 32-, 64-, or  
128-MB DIMMs. Self-refresh DIMMs are required on models with three DIMM sockets.  
For proper system operation, the DIMMs must be industry standard 168-pin, 66-MHz or  
faster unbuffered SDRAM DIMMs. If your system processor has a bus speed of 66 MHz,  
Compaq recommends that any additional DIMMs also be 66 MHz. If the system bus  
speed is 100 MHz, the use of 100-MHz DIMMs is required. (Run Compaq Computer  
Setup to determine your system bus speed; see the Software Reference Guide for  
instructions.)  
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 are not supported; the system will not start using  
unsupported DIMMs.  
4.15.2 Intel 810/810e  
The Intel 810 comes with at least 32 MB of SDRAM DIMMs and the Intel 810e comes  
with at least 64-MB of SDRAM DIMMs, upgradeable to 512 MB.  
The memory sockets on the system board can be populated with industry-standard  
DIMMs. These memory module slots are populated by 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, 100 MHz,  
unbuffered, PC100-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 are not supported; the system  
will not start using unsupported DIMMs.  
✎
The Intel 810 does not support 66-MHz memory.  
CAUTION: The DIMM sockets have gold metal contacts. When upgrading memory, it Is important  
to use DIMMs with gold metal contacts (not tin-lead) 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  
boards. Before beginning these procedures, ensure that you are discharged of static electricity by  
briefly touching a grounded metal object.  
CAUTION: When handling a memory module, be careful not to touch any of the contacts. Doing  
so can damage the module.  
4-30  
Removal and Replacement Procedures  
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To install a memory module, complete the following steps:  
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 4.6).  
4. Press outward on both latches 1 of the DIMM socket. The latches are used to secure  
the DIMM in position and also to eject them from the socket when pressed outward.  
Begin by installing a module into the socket nearest the preinstalled module, and install  
the modules following the numerical order of the sockets.  
Match the notch on the module with the tab on the memory socket. Push the module  
down into the socket 2, ensuring that the module is fully inserted and properly seated  
3 with the latches pushed in.  
Installing a DIMM Module  
5. Repeat step 4 for any additional modules that you want to install.  
6. Reassemble the computer.  
7. 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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4.16  
AGP Graphics Board (440BX)  
4.16.1 AGP Graphics Board Removal (440BX)  
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 4.6).  
4. Remove the AGP graphics board as you would any other expansion board  
(Section 4.13.3).  
Removing the RAGE PRO Graphics Board  
To install the graphics board, reverse the above procedure.  
4-32  
Removal and Replacement Procedures  
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4.16.2 Graphics Memory Upgrade (440BX)  
✎
It is not necessary to remove the graphics board to install the memory upgrade  
module.  
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 4.6).  
4. Insert the memory module at a 30 degree angle, making sure that the notch on the  
module aligns with the tab in the socket 1, then pivot the module until it latches into  
position 2.  
Installing the Memory Module  
5. Replace the access panel.  
6. Reassemble the computer.  
7. Customize the monitor display through the Control Panel.  
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4.17  
Processor Components  
4.17.1 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. Lay the computer down on its large base for greater stability.  
3. Remove the access panel (Section 4.6).  
WARNING: To reduce the risk of personal injury from hot surfaces, allow the internal system  
components to cool before touching.  
4. For the Pentium II processor, press in on the retaining clips on each side of the  
processor, then lift the processor out of the socket.  
Removing the Pentium II Processor from the System Board - 440BX  
5. For the Celeron processor, press down on one retaining clip and pull the processor up  
just enough to disengage the locking device, then press down on the second clip and  
pull the processor completely out of the socket.  
✎
It may be necessary to remove the graphics board before removing this processor.  
4-34  
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Removing the Celeron Processor from the System Board - 440BX  
To install a new processor, reverse this procedure.  
Before installing a Pentium II processor, make sure the release latches are in the locked  
position. This will cause the processor to make an audible sound when it is properly  
seated in the retaining clip.  
6. For the Celeron processor on the Revised Configuration, remove the heatsink retaining  
clip 1 by pressing down on the clip’s extended tab until it releases from the safety  
catch.  
7. Lift the heatsink 2 off the processor.  
8. Release the original processor from the socket by pulling the handle on the ZIF  
socket 3 out and upward.  
9. Lift the processor 4 out of the socket.  
Removing the Celeron Processor from the System Board - Intel 810  
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To install a new processor, reverse this procedure.  
✎
If the heatsink has a thermal pad attached to its bottom, peel off the protective  
paper before installing the heatsink.  
If the heatsink does not have a thermal pad attached to its bottom, apply a single  
swipe of the thermal crayon to the processor before installing the heatsink.  
✎
Replace the thermal pad when you replace the heatsink on Celeron 466/66-MHz  
or faster processors and Pentium III 550/100-MHz or faster processors.  
CAUTION: Carefully remove the pad and all residue from the heatsink surface. Thermal pad heat  
transmission is reduced if residue remains on the heatsink or the heatsink surface is scratched.  
4-36  
Removal and Replacement Procedures  
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4.17.2 Processor Guide Rails  
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 4.6).  
4. Remove the processor (Section 4.17.1).  
5. Remove the system board from the chassis (Section 4.18).  
6. Turn the system board over so the bottom side is up, then use a short, small diameter  
screwdriver to press the push-pins out of the plastic Tufloks that secure the processor  
rails to the system board.  
Removing the Processor Rails  
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7. With the Tuflok pins in their full up position, firmly pull on each leg of the processor  
rail to disengage it from the system board.  
8. Place each of the type 2 processor rail goalposts (Compaq part number 350767-002) in  
position with the open end facing the processor socket and push firmly down to fully  
seat the free end of each Tuflok in its hole. Then push down on each push-pin to secure  
the goalpost.  
Replacing the Processor Rails  
!
!
Reinstall the system board in the computer chassis.  
Use your fingernail to lift and remove the four push tabs that attach the processor  
guide rails to the system board, then remove the rails.  
To replace the processor guide rails, seat the guide rails flush with the system board, then  
press in the push tabs to attach the rails to the system board.  
4-38  
Removal and Replacement Procedures  
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4.18  
System 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 4.6).  
4. Remove all expansion boards (Section 4.13.3).  
5. Disconnect any cables that are attached to the system board, noting their location for  
reinstallation.  
6. Remove the DIMMs (optional) (Section 4.15).  
7. Remove the AGP graphics board (Section 4.16.1).  
8. Remove the processor (Section 4.17.1).  
9. Remove the six retaining screws that secure the system board to the chassis.  
10. Slide the board about ½ inch towards the front of the chassis to disengage the I/O panel,  
then lift it up and out of the chassis.  
Removing the System Board  
To install a new system board, reverse the above procedures. When installing the system  
board, insert the screw 1 nearest the power supply to properly align the board in the  
chassis.  
The system board is not spared with the processor board guide rails installed. Remove  
the guide rails from the existing board and install them on the new system board.  
✎
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4.19  
Internal Speaker  
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 4.6).  
4. Disconnect the speaker cable from the audio board 1.  
5. If a round speaker is used on the computer, remove the two screws 2 that secure the  
speaker 3 to the side of the drive cage.  
Removing the Speaker From the Side of the Drive Cage  
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6. If an oval speaker is used on the computer, remove the four screws 2 that secure the  
speaker 3 to the rear of the chassis.  
Removing the Speaker From the Rear of the Chassis  
To install the new speaker, reverse the preceding steps.  
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4.20  
Lithium Battery  
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 4.6).  
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 4.13.3).  
Locating the Battery on the System Board - 440BX  
4-42  
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Locating the Battery on the System Board - Intel 810  
Locating the Battery on the System Board - Intel 810e  
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5. Lift the battery out of the holder.  
Removing the Battery  
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-ion battery pack. 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-ion 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.  
4-44  
Removal and Replacement Procedures  
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4.21  
Fan Assembly  
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 4.6).  
4. Disconnect the fan power cable 1 from the system board.  
5. Remove the 4 screws 2 that secure the fan to the chassis.  
6. Remove the fan from the chassis 3.  
7. Pull on the two push-pins that secure the fan grill to remove it from the fan.  
Removing the Fan  
To install the fan assembly, reverse the above procedure.  
Use the fan on Pentium II units 450/100 and above and on Pentium III units  
450/100 and above.  
✎
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4.22  
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 4.6).  
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 three external screws that secure the power supply to the back of the  
chassis. The internal screw that secures the power supply to the side of the chassis may  
not need to be removed, only loosened.  
6. Slide the power supply toward the front of the computer, then lift up to remove it from  
the chassis.  
Removing the Power Supply - 440BX  
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Removing the Power Supply - Intel 810/810e  
To replace the power supply, reverse the above procedure.  
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4.23  
Converting a Desktop to a Minitower  
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 4.6).  
4. Remove the front bezel (Section 4.7).  
5. Remove the drives from the 5.25-inch drive bays by pressing drivelock 1  
(Sections 4.11.2 and 4.11.3).  
Activating the Drivelocks (Shown from the Rear of the Chassis)  
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6. Rotate the drives 90 degrees, then reinstall them into the drive bays.  
✎
The diskette drive should always be placed in bay number 3, the bay nearest the  
internal 3.5-inch drives, for proper placement within the chassis.  
Installing a Drive in the Minitower Configuration  
CAUTION: The use of unnecessary force may result in damage to the drives.  
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7. Reconnect the power, signal, and audio cables to the drives.  
8. Remove the subpanel and rotate the bezel blanks 90 degrees (Section 4.9).  
CAUTION: Hold the subpanel straight when you pull it away from the front bezel. Pulling the  
subpanel away at an angle could damage the pins that align it within the front bezel.  
Changing from a Desktop 1 to a Minitower 2 Configuration  
9. Replace the subpanel, front bezel, and the computer access panel.  
10. Reassemble the computer.  
4-50  
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4.24  
Converting a Minitower to a Desktop  
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 4.6).  
4. Remove the front bezel (Section 4.7).  
5. Disconnect all power and data cables from the drives in the 5.25-inch drive bays.  
6. Remove the drives from the 5.25-inch drive bays by pressing drivelock 2  
(Sections 4.11.2 and 4.11.3).  
Activating the Drivelocks (Shown from the Rear of the Chassis)  
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7. Rotate the drives 90 degrees, then reinstall them into the drive bays.  
✎
The diskette drive should always be placed in the bay nearest the top of the  
chassis in the desktop configuration for proper drive clearance and access.  
Installing a Drive in the Desktop Configuration  
CAUTION: The use of unnecessary force may result in damage to the drives.  
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8. Reconnect the power, signal, and audio cables to the drives.  
9. Remove the subpanel and rotate the bezel blanks 90 degrees (Section 4.9).  
CAUTION: Hold the subpanel straight when you pull it away from the front bezel. Pulling the  
subpanel away at an angle could damage the pins that align it within the front bezel.  
Converting a Minitower 2 to a Desktop 1  
10. Replace the subpanel, front bezel, and the computer access panel.  
Reassemble the computer.  
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chapter 5  
CONNECTORS, JUMPERS, AND SWITCHES  
5.1  
System Board  
5.1.1  
Connectors, Jumpers, and Switches  
System Board Overview - 440BX (Three-DIMM Board)  
Connectors, Jumpers, and Switches - 440BX (Three-DIMM Board)  
Item  
Description  
Item  
P1  
Description  
CR114 AUX LED  
Power Supply Connector  
Power Switch and LED Connector  
E50  
J1  
CMOS Header  
P5  
DIMM 1 Expansion Slot  
DIMM 2 Expansion Slot  
DIMM 3 Expansion Slot  
PCI/ISA Dual Expansion Slot (combo)  
ISA Expansion Slot  
P8  
Chassis Fan Connector  
Wake on LAN Header  
Diskette Drive Connector  
IDE Connector (primary)  
IDE Connector (secondary)  
Not used  
J2  
P9  
J3  
P10  
P20  
P21  
P24  
P55  
J10  
J11  
J20  
J21  
J22  
J23  
J40  
PCI Expansion Slot  
PCI Expansion Slot  
Not Used  
PCI Expansion Slot  
Slot 1 Processor Connector  
PCI Dual Expansion Slot (combo)  
AGP Video Graphics Slot  
SW1  
Processor Speed and Feature Switch  
Compaq Despro EP Series of Personal Computers  
5-1  
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System Board Overview - 440BX (Two-DIMM Board)  
Connectors, Jumpers, and Switches - 440BX (Two-DIMM Board)  
Item  
Description  
Item  
J40  
P1  
Description  
CR114 AUX LED  
AGP Video Graphics Slot  
Power Supply Connector  
Power Switch and LED Connector  
Chassis Fan Connector  
Wake on LAN Header  
E50  
J1  
CMOS Header  
DIMM 1 Expansion Slot  
DIMM 2 Expansion Slot  
ISA Expansion Slot  
P5  
J2  
P8  
J10  
J11  
J12  
J20  
J21  
J22  
P9  
ISA Expansion Slot  
P10  
P20  
P21  
Diskette Drive Connector  
IDE Connector (primary)  
IDE Connector (secondary)  
PCI/ISA Dual Expansion Slot (combo)  
PCI Expansion Slot  
PCI Expansion Slot  
Slot 1 Processor Connector  
SW1 Processor Speed and Feature Switch  
PCI Dual Expansion Slot (combo)  
Connectors, Jumpers, and Switches - Intel 810e (PCA=010697-101)*  
Item  
J7H1  
J4C1  
J4B1  
J4A1  
J4A2  
J4D1  
Description  
Item Description  
Clear Password  
J7J1  
Power Supply Connector  
PCI Expansion Slot 1  
PCI Expansion Slot 2  
PCI Expansion Slot 3  
PCI Dual Expansion Slot (combo)  
AGP Expansion Slot  
J8F1 Power Switch and LED Connector  
J6K1 Chassis Fan  
J2D5 Audio-In Header  
J9F2 IDE Connector (primary)  
J9F1 IDE Connector (secondary)  
J9G3 Wake on LAN Header  
J10F1 Diskette Drive Connector  
* Not shown  
5-2  
Connectors, Jumpers, and Switches  
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System Board Overview - Intel 810 (Two-DIMM Board)  
System Board Overview - Intel 810e (Two-DIMM Board)  
Connectors, Jumpers, and Switches - Intel 810/810e (Two-DIMM Board)  
Item  
Description  
Item Description  
CR114 AUX LED  
P1  
Power Supply Connector  
E49  
Clear Password  
P5  
Power Switch and LED Connector  
Chassis Fan  
XMM1 DIMM 1 Expansion Slot  
XMM2 DIMM 2 Expansion Slot  
P6  
P7  
CD-In Header  
J10  
J11  
J20  
J21  
J22  
J23  
J24  
ISA Dual Expansion Slot 1 (combo)  
P8  
Chassis Fan Connector  
Wake on LAN Header  
Diskette Drive Connector  
IDE Connector (primary)  
IDE Connector (secondary)  
Processor Connector  
ISA Expansion Slot 2  
P9  
PCI Expansion Slot 1  
P10  
P20  
P21  
XU1  
PCI Expansion Slot 2  
PCI Expansion Slot 3  
PCI Expansion Slot 4  
PCI Dual Expansion Slot 5 (combo)  
SW50 CMOS Button  
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5-3  
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5.1.2  
Switches  
Location of SW1 DIP Switches on the System Board - 440BX  
Switch SW1 Settings (440BX)  
Password Control  
Disable Password  
S1 On  
S1 Off  
Enable Password (Default setting)  
Processor Speed  
233/66 MHz  
S2  
S3  
S4  
S5  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
OFF  
ON  
OFF  
ON  
ON  
266/66 MHz  
OFF  
OFF  
OFF  
ON  
300/66 MHz  
ON  
OFF  
ON  
333/66 MHz (maximum)  
350/100 MHz  
OFF  
OFF  
ON  
OFF  
ON  
400/100 MHz  
OFF  
OFF  
OFF  
450/100 MHz  
ON  
OFF  
ON  
500/100 MHz  
OFF  
As of January 1, 1999, all 300-MHz and faster Celeron and Pentium processors  
are shipped with the processor speeds preset. This preset processor speed will  
override any switch settings on the system board.  
✎
5-4  
Connectors, Jumpers, and Switches  
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5.1.3  
Jumpers (440BX)  
This section provides information on enabling/disabling passwords and clearing the  
configuration (CMOS).  
E50 Jumper Location  
When you change a security feature, you must reset the appropriate jumper on the system  
board, then reconfigure the computer to recognize this change. If the system configuration  
is incorrect, your computer may not work properly and you may receive error messages.  
Setting system board jumpers is part of the reconfiguration process, along with running  
the Computer Setup utility.  
To change the system board jumpers, you must remove the system access panel.  
For assembly and disassembly procedures, refer to Chapter 4.  
✎
CAUTION: To reduce the risk of personal injury from hot surfaces, allow the internal system  
components to cool before touching.  
WARNING: Be sure to turn off the computer before changing a jumper setting or damage to the  
system board can result.  
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Disabling or Clearing the Power-On and Setup Passwords (440BX) )  
1. Turn off the computer and any external devices, and disconnect the power cord from  
the power outlet.  
2. Set SW1, position 1, to the ON position.  
3. Turn on the computer and allow the operating system to start. This clears the current  
passwords and disables the password features.  
4. To re-enable the password features, turn off the computer and set SW1, position 1, to  
the OFF position.  
5. Turn on the computer and establish new passwords.  
Clearing Configuration Memory (CMOS) (440BX)  
The computer’s configuration memory (CMOS) may occasionally be corrupted. When  
this occurs, it is usually due to software or hardware that is not functioning accurately or  
due to the addition or removal of expansion boards. If the computer’s configuration  
memory becomes corrupted, it is necessary to clear the configuration memory.  
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 equipment connected to the  
computer.  
3. Remove the computer access panel.  
4. Locate jumper E50.  
5. Remove the jumper from pins 1 and 2, place it on pins 2 and 3 for approximately 30  
seconds, then return it to pins 1 and 2.  
6. Replace the computer access panel.  
7. Reconnect the external equipment.  
8. Plug in the computer and turn on power.  
When the CMOS jumper is removed, all passwords become invalid because the passwords  
are stored in the configuration memory. You must reset the passwords and any special  
system setups.  
Another method of clearing CMOS is to use the F10 Setup feature.  
5-6  
Connectors, Jumpers, and Switches  
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5.1.4  
Jumpers (Intel 810/810e)  
E49 Jumper Location  
When you change a security feature, you must reset the appropriate jumper on the system  
board, then reconfigure the computer to recognize this change. If the system configuration  
is incorrect, your computer may not work properly and you may receive error messages.  
Setting system board jumpers is part of the reconfiguration process, along with running  
the Computer Setup utility.  
To change the system board jumpers, you must remove the system access panel.  
For assembly and disassembly procedures, refer to Chapter 4.  
✎
CAUTION: To reduce the risk of personal injury from hot surfaces, allow the internal system  
components to cool before touching.  
WARNING: Be sure to turn off the computer before changing a jumper setting or damage to the  
system board can result.  
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Disabling or Clearing the Power-On and Setup Passwords (Intel 810/810e)  
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 or access panel.  
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 or access panel.  
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.  
Disabling or Clearing the Power-On and Setup Passwords (Intel 810/810e, PCA=010697)  
The computer's configuration (CMOS) may occasionally be corrupted. If it does, it is  
necessary to clear the CMOS memory.  
To clear and reset the configuration, perform the following procedure:  
!
Prepare the computer for disassembly.  
CAUTION: The power cord must be disconnected from the power source before changing the  
jumpers. Failure to do so may damage the system board.  
!
!
Remove the hood.  
Move the J7H1 jumper from pins 1 and 2 to pins 2 and 3 for 60 seconds, then replace  
the jumper to its original position.  
!
!
!
Replace the hood.  
Turn the computer on.  
Run the Computer Setup utility to reconfigure the system.  
When CMOS is cleared, both the power-on password and the setup password become  
invalid because both are stored in the configuration memory. You will need to reset the  
passwords.  
5-8  
Connectors, Jumpers, and Switches  
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Clearing Configuration Memory (CMOS) - Intel 810/810e)  
CMOS Button (SW50) Location  
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 equipment connected to the  
computer.  
WARNING: To reduce the risk of personal injury from electrical shock and/or hot surfaces, be  
sure to disconnect the power cord from the wall outlet, and allow the internal system components  
to cool before touching.  
CAUTION: When the computer is plugged in, the power supply always has voltage applied to the  
system board even when the unit is turned off. Failure to disconnect the power cord can result in  
damage to the system.  
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. Refer to the Safety & Regulatory Information guide for  
more information.  
3. Remove the computer cover or access panel.  
4. Locate and press the Clear CMOS button. Hold for five seconds.  
CAUTION: Pushing the CMOS button will erase all information in CMOS including passwords,  
asset numbers, and special settings.  
5. Replace the computer cover or access panel.  
6. Reconnect the external devices.  
7. Plug in the computer and turn on power.  
✎
You will need to reset your passwords and any special system setups. Refer to  
F10 Setup to establish new passwords.  
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5.2  
Hard Drives  
The computer supports up to five drives in various configurations. 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 the drive will line up correctly in the drive  
cage. Compaq has provided extra guide screws, installed in the front of the  
computer chassis, behind the front bezel. Some options use metric hardware.  
Compaq-supplied metric screws are black.  
5.2.1  
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 the  
connector closest to the system board); the device 1 drive is the drive connected to the  
long segment of the drive cable ( or farthest from the system board).  
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.  
✎
For more information about Compaq hard drives, refer to the Deskpro Service Reference  
Guide.  
5-10  
Connectors, Jumpers, and Switches  
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5.2.2  
Drive Jumper Settings  
If you are installing a drive with a signal cable that does not support cable select, you must  
manually set the drive jumpers. Jumper settings for a number of different drives are shown  
in the tables that follow.  
The illustrations show the approximate location of the drive jumpers, based on the  
manufacturer of the drive. The actual location may vary slightly from drive to drive.  
Seagate, Fujitsu, and Western Digital Ultra ATA Hard Drive Jumper Settings  
Seagate, Fujitsu, and Western Digital Ultra ATA Hard Drive Jumper Settings  
Definition  
Single  
Seagate  
7 to 8  
Fujitsu  
Western Digital  
1-2 and 3-5  
1-2 and 3-5  
3-5  
3-5  
5-6  
3-4  
1-2  
Primary  
5 to 6 and 7 to 8  
no connection  
5 to 6  
Secondary  
Cable Select  
2-4 and 3-5  
Limit capacity to 2.1-GB 1 to 2  
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Maxtor Ultra ATA Hard Drive Jumper Settings  
Maxtor Ultra ATA Hard Drive Jumper Settings  
Definition  
J50  
J
J48  
J46  
J44  
J42  
Single  
Primary (in a dual drive system)  
Secondary  
J
O
Cable Select  
disabled*  
O
J
enabled  
4092 Cylinder Limitation  
disabled*  
O
J
enabled  
Factory Reserved  
Factory Reserved  
O
O
J=jumper  
O=no jumper  
*=default setting  
5-12  
Connectors, Jumpers, and Switches  
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chapter 6  
SPECIFICATIONS  
6.1  
Specifications  
6.1.1  
System  
Desktop Dimensions  
6.60 in  
17.65 in  
17.11 in  
16.76 cm  
44.83 cm  
43.46 cm  
Height  
Width  
Depth  
Minitower Dimensions  
17.65 in  
6.60 in  
17.11 in  
44.83 cm  
16.76 cm  
43.46 cm  
Height  
Width  
Length  
26 lb  
12 kg  
Weight (approximate, depending on configuration)  
Power Supply, 145 Watt (440BX)  
Operating Voltage Range  
Rated Voltage Range  
Rated Line Frequency  
90-132 VAC  
110-120 VAC  
47-63 Hz  
180-264 VAC  
200-240 VAC  
47-63 Hz  
Rated input current (maximum)  
Heat dissipation, nominal  
Heat dissipation, maximum  
4.0 A  
380 BTU/Hr  
760 BTU/Hr  
2.0 A  
1.60 kg-cal/min  
3.19 kg-cal/min  
Power Supply, 200 Watt (440BX)  
Operating Voltage Range  
Rated Voltage Range  
Rated Line Frequency  
90-132 VAC  
110-120 VAC  
47-63 Hz  
180-264 VAC  
200-240 VAC  
47-63 Hz  
Rated input current (maximum)  
Heat dissipation, nominal  
Heat dissipation, maximum  
5.5 A  
525 BTU/Hr  
1,050 BTU/Hr  
3.0 A  
2.21 kg-cal/min  
4.41 kg-cal/min  
Power, Supply, 145 Watt (Intel 810e)  
Operating Voltage Range  
Rated Voltage Range  
Rated Line Frequency  
90-132 VAC  
110-120 VAC  
47-63 Hz  
180-264 VAC  
200-240 VAC  
47-63 Hz  
Rated input current (maximum)  
Heat dissipation, nominal  
Heat dissipation, maximum  
4.0 A  
380 BTU/Hr  
760 BTU/Hr  
2.0 A  
0.96 kg-cal/min  
1.91 kg-cal/min  
Continued  
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6-1  
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System Specifications, continued  
Power, Supply, 200 Watt (Intel 810/810e)  
Operating Voltage Range  
Rated Voltage Range  
Rated Line Frequency  
90-132 VAC  
100-127 VAC  
47-63 Hz  
180-264 VAC  
200-240 VAC  
47-63 Hz  
Rated input current (maximum)  
Heat dissipation, nominal  
Heat dissipation, maximum  
6 A  
525 BTU/Hr  
1050 BTU/Hr  
3 A  
2.21 kg-cal/min  
4.41 kg-cal/min  
Environmental Requirements:  
Temperature  
Operating  
Shipping  
Humidity (noncondensing)  
Operating  
50 to 95°F  
10 to 35°C  
-4° to 140°F  
-20° to 60°C  
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  
6.1.2  
Interrupts  
Hardware IRQ  
IRQ 0  
System Function  
Timer Interrupt (Not on ISA Bus)  
Keyboard (Not on ISA Bus)  
IRQ 1  
IRQ 2  
Interrupt Controller Cascade (Not on ISA Bus)  
Unused  
IRQ 3  
IRQ 4  
Serial Port (COM 1)  
Audio (alternate = IRQ 7, 9, 10, 11, or 12)  
Diskette Drive  
IRQ 5  
IRQ 6  
IRQ 7  
Parallel Port (LPT 1)  
Real-Time Clock (Not on ISA Bus)  
Unused  
IRQ 8  
IRQ 9  
IRQ 10  
IRQ 11  
IRQ 12  
IRQ 13  
IRQ 14  
IRQ 15  
Unused  
PCI Interrupt  
Mouse  
Coprocessor (Not on ISA Bus)  
IDE Interface Hard Drive  
CD-ROM  
6-2  
Specifications  
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6.1.3  
DMA  
Hardware DMA System Function  
DMA 0  
DMA 1  
DMA 2  
DMA 3  
DMA 4  
DMA 5  
DMA 6  
DMA 7  
Unused  
Audio (Alternate = DMA 0 or 3)  
Diskette Drive  
ECP Parallel Port LPT1 (Default; Alternate = DMA 0)  
DMA Controller Cascading (Not on ISA Bus)  
Unused  
Unused  
Unused  
6.1.4  
I/O  
I/O  
Address  
(Hex)System  
Function  
(Shipping  
Configuration)  
000 - 00F  
010 - 01F  
020 - 03F  
040 - 043  
044 - 05F  
060  
DMA Controller # 1  
Unused  
Interrupt Controller # 1  
Counter/Timer  
Unused  
Keyboard Controller  
Port B  
061  
062 - 063  
064  
Unused  
Keyboard Controller  
Unused  
065 - 06F  
070 - 071  
072 - 077  
078 - 07F  
080 - 08F  
090 - 091  
092  
NMI Enable/Real-Time Clock  
CMOS Storage  
Unused  
DMA Page Registers  
Unused  
Port A  
093 - 09F  
0A0 - 0BF  
0C0 - 0DF  
0E0 - 0EB  
0EC - 0ED  
0EE - 0EF  
0F0 - 0F1  
0F2 - 0F3  
0F4 - 0F5  
0F6 - 0F8  
0F9  
Unused  
Interrupt Controller # 2  
DMA Controller # 2  
Unused  
483 Configuration Index/Data  
483 Fast A20/Fast Reset  
Co-Processor Busy Clear/Reset  
Unused  
483 CPU Speed Slow/Fast  
Unused  
483/PGL Configuration Lock  
Continued  
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I/O Continued  
I/O  
Address  
(Hex)System  
Function  
(Shipping  
Configuration)  
0FA  
Unused  
0FB  
483/PGL Configuration Unlock  
0FC - 0FF  
100 - 12F  
130 - 131  
132 - 16F  
170 - 177  
15C - 15D  
178 - 1EF  
1F0 - 1F7  
1F8 - 1FF  
200  
Unused  
Unused  
Unused  
Unused  
Reserved  
Super I/O Index/Data Register  
Unused  
Fixed Disk Controller  
Unused  
Unused  
201  
Unused  
202 - 21F  
220 - 22F  
230 - 277  
278 - 27F  
280 - 2E7  
2E8 - 2EF  
2F0 - 2F7  
2F8 - 2FF  
300 - 317  
318 - 319  
31A - 36F  
370 - 377  
378 - 37F  
380 - 387  
388 - 38B  
38C - 397  
39A - 3AF  
3B0 - 3BB  
3BC - 3BF  
3C0 - 3DF  
3E0 - 3E7  
3E8 - 3EF  
3F0 - 3F7  
3F8 - 3FF  
Unused  
Audio (Alternate = 240 - 24F, 260 - 26F, or 280 - 28F)  
Unused  
Reserved Parallel Port  
Unused  
Reserved Serial Port  
Unused  
Reserved Serial Port  
Unused  
Unused  
Unused  
Reserved  
Parallel Port (Primary)  
Unused  
Unused  
Unused  
Unused  
MDA, EGA/VGA  
Reserved (Parallel Port)  
EGA/VGA  
Unused  
Reserved (Serial Port)  
Diskette Controller  
Serial Port (Primary)  
6-4  
Specifications  
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6.1.5  
Memory Map  
Size  
Memory Address  
System Function  
System ROM  
256 KB *  
3839 MB *  
255 MB *  
128KB  
FFFC0000h to FFFFFFFFh  
10000000h to FFFBFFFFh  
00100000h to 0FFFFFFFh  
000E0000h to 000FFFFFh  
000C8000h to 000DFFFFh  
000C0000h to 000C7FFFh  
000A0000h to 000BFFFFh  
00000000h to 0009FFFFh  
PCI Memory Expansion  
HOST or PCI Memory Expansion  
System ROM  
96 KB  
ISA/PCI option ROMs  
Video ROM  
32 KB  
128 KB  
640 KB  
Video RAM  
Base Memory  
All memory above the first 256 MB is non-cacheable. All PCI memory is non-cacheable.  
*AGP Window  
6.2  
Drives  
6.2.1  
1.44-MB Diskette Drive  
Size and Capacity  
3.5  
Size (in)  
1.44  
720  
High Density (MB)  
Low Density (KB)  
179161-001  
Green  
Compaq Spare Part Number  
Light  
One-third (1 inch)  
512  
Height  
Bytes per Sector  
Sectors per Track  
High Density  
18  
9
Low Density  
Tracks per Side  
High Density  
Low Density  
80  
80  
2
Read/Write Heads  
Average Seek Time (Mb/s)  
Track-to-Track (high/low)  
Average (high/low)  
3/6  
94/173  
100  
Latency Average (ms)  
Compaq Deskpro EP Series of Personal Computers  
6-5  
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6.2.2  
Ultra ATA Hard Drives  
3.2-GB  
4.3-GB  
4.3-GB  
6.4-GB  
6.4-GB  
332866-001 327646-001 134197-001 166973-001 134198-001  
Compaq Spare Part Number  
Drive Type  
65  
65  
65  
65  
65  
5400  
5400  
5400  
5400  
5400  
Revolutions Per Minute (RPM)  
Transfer Rate  
33.3  
33.3  
66.6  
33.3  
66.6  
Interface (MBytes/sec)  
Typical Seek Time (including  
settling)  
<1.0  
<9.5  
20.0  
1.3  
9.9  
19.7  
1.3  
9.0  
20.0  
<1.0  
<9.7  
18.0  
1.3  
9.0  
20.0  
Single Track (ms)  
Average (ms)  
Full Stroke (ms)  
Cylinders  
6296  
15  
8912  
15  
8912  
15  
13328  
15  
13328  
15  
Logical  
Data Heads  
Logical  
Sectors per Track  
63  
63  
63  
63  
63  
Logical  
256  
512  
512  
512  
512  
Buffer Size (KB)  
10.0-GB  
10.0-GB  
13.5-GB  
320662-001 135364-001 140515-001  
Compaq Spare Part Number  
Drive Type  
65  
65  
65  
5400  
5400  
7200  
Revolutions Per Minute (RPM)  
Transfer Rate  
33.3  
66  
66.6  
Interface (MBytes/sec)  
Typical Seek Time (including  
settling)  
1.42  
9.4  
18.6  
2.1  
10.9  
25.0  
1.7  
8.5  
165.0  
Single Track (ms)  
Average (ms)  
Full Stroke (ms)  
Cylinders  
16383  
16  
16383  
16  
16383  
16  
Logical  
Data Heads  
Logical  
Sectors per Track  
63  
63  
63  
Logical  
512  
512  
1966  
Buffer Size (KB)  
*Factory installed hard drives are formatted with a 2-GB partition. To check the actual size of the  
hard drive and to create or modify paritions, restart the computer, then press F10 to enter  
Setup/Storage/IDE.  
6-6  
Specifications  
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6.2.3  
CD-ROM Drives  
24X Max  
32X Max  
CD-ROM mode 1, mode 2  
Mixed mode (audio and data  
combined)  
CD-ROM mode1, mode 2  
Mixed mode (audio and data  
combined)  
Applicable Disc  
CD-DA  
CD-DA  
CDi ready  
CDi ready  
CD-XA ready  
CD-XA ready  
Photo CD (single and multi-  
session)  
Photo CD (single and multi-  
session)  
166869-001  
327659-001  
Compaq Spare Part  
Number  
12 cm, 8 cm  
12 cm, 8 cm  
Disc Diameter  
Capacity  
540 MB (Mode 1, 12 cm)  
650 MB (Mode 2, 12 cm)  
180 MB (8 cm)  
540 MB (Mode 1, 12 cm)  
650 MB (Mode 2, 12 cm)  
15 mm  
1.2 mm  
1.6 µm  
15 mm  
1.2 mm  
1.6 um  
Center Hole Diameter  
Disc Thickness  
Track Pitch  
Laser  
53.5 degrees +/- 1.5 degrees  
0.14 mW  
Semiconductor laser GaAIAs  
780 nm +/- 25 nm  
53.5 degrees +/- 1.5 degrees  
0.14 mW  
Semiconductor laser GaAIAs  
780 nm +/- 25 nm  
Beam Divergence  
Output Power  
Type  
Wave Length  
Access Time  
Random  
85 ms  
200 ms  
<100 ms  
<150 ms  
Full Stroke  
0.7 Vrms (typical)  
128 KB  
0.7 Vrms (typical)  
128 KB  
Audio Output Level  
Cache Buffer  
Data Transfer Rate  
Sustained  
1500 to 3600 KB/sec  
4.0 MB/sec  
2100 to 4800 KB/sec  
16 MB/sec  
Burst  
Continued  
Compaq Deskpro EP Series of Personal Computers  
6-7  
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CD-ROM continued  
40X Max  
CD-ROM mode 1, mode 2  
Mixed mode (audio and data  
combined)  
Applicable Disc  
CD-DA  
CDi ready  
CD-XA ready  
Photo CD (single and multi-  
session)  
400807-001  
Compaq Spare Part  
Number  
12 cm, 8 cm  
Disc Diameter  
Capacity  
540 MB (Mode 1, 12 cm)  
650 MB (Mode 2, 12 cm)  
180 MB (8 cm)  
15 mm  
1.2 mm  
1.6 µm  
Center Hole Diameter  
Disc Thickness  
Track Pitch  
Laser  
53.5 degrees +/- 1.5 degrees  
0.14 mW  
Semiconductor laser GaAIAs  
780 nm +/- 25 nm  
Beam Divergence  
Output Power  
Type  
Wave Length  
Access Time  
Random  
85 ms  
200 ms  
Full Stroke  
0.7 Vrms (typical)  
128 KB  
Audio Output Level  
Cache Buffer  
Data Transfer Rate  
Sustained  
1500 to 3600 KB/sec  
4.0 MB/sec  
Burst  
6-8  
Specifications  
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6.3  
6.4  
Compaq Enhanced Keyboard  
Dimensions  
1.3 in  
18.3 in  
6.35 in  
3.3 cm  
46.5 cm  
16.1 cm  
Height  
Width  
Depth  
3.0 lb  
1.4 kg  
Weight  
2-Button 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  
400 dpi  
25 cm/sec  
Base Resolution  
Tracking Speed (maximum)  
Temperature  
Operating  
Storage  
32°F to 104°F  
-4°F to 140°F  
0°C to 40°C  
-20°C to 60°C  
Lifetime  
Mechanical  
Switch  
Exceeds 300 miles  
Exceeds 1 million operations  
Exceeds 483 km  
Exceeds 1 million operations  
10% to 90%, noncondensing  
10% to 90%, noncondensing  
Relative Humidity  
ESD  
No soft errors through 10 kV  
No hard errors through 15 kV;  
specific performance depends on  
host system  
6.5  
Supported Graphics Resolutions  
6.5.1  
ATI RAGE PRO TURBO 1X AGP  
Supported Colors  
Refresh Rate 4-MB SGRAM  
Resolution  
1600 x 1200  
1280 x 1024  
1152 x 864  
1024 x 768  
800 x 600  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
65K  
16.7M  
16.7M  
16.7M  
16.7M  
16.7M  
640 x 480  
Compaq Deskpro EP Series of Personal Computers  
6-9  
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6.5.2  
ATI RAGE PRO IIC AGP  
Colors Supported  
Refresh Rate 2-MB EDO RAM  
Resolution  
1600 x 1200  
1280 x 1024  
1152 x 864  
1024 x 768  
800 x 600  
75 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
256  
256  
65K  
65K  
16.7M  
16.7M  
640 x 480  
6.5.3  
NVIDIA RIVA 128 AGP  
Colors Supported  
Resolution  
1920 x 1080  
1600 x 1200  
1280 x 1024  
1152 x 864  
1024 x 768  
800 x 600  
Refresh Rate  
4-MB SGRAM  
72 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
256  
65K  
65K  
16M  
16M  
16M  
16M  
640 x 480  
6.5.4  
Matrox MGA G100 AGP  
Colors Supported  
Resolution  
1920 x 1200  
1920 x 1080  
1800 x 1440  
1600 x 1200  
1280 x 1024  
1152 x 864  
1024 x 768  
800 x 600  
Refresh Rate 4-MB SGRAM  
70 Hz  
75 Hz  
65 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
256  
256  
256  
65K  
16.7M  
16.7M  
16.7M  
16.7M  
16.7M  
640 x 480  
6-10  
Specifications  
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6.5.5  
Matrox Millenium G200-SD AGP  
Colors Supported  
Refresh Rate 8-MB SDRAM  
Resolution  
1920 x 1200  
1920 x 1200  
1920 x 1080  
1920 x 1080  
1800 x 1440  
1800 x 1440  
1600 x 1200  
1600 x 1200  
1280 x 1024  
1152 x 864  
1024 x 768  
800 x 600  
76 Hz  
65 Hz  
80 Hz  
70 Hz  
70 Hz  
60 Hz  
85 Hz  
75 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
65K  
16.7M  
65K  
16.7M  
65K  
16.7M  
65K  
16.7M  
16.7M  
16.7M  
16.7M  
16.7M  
16.7M  
640 x 480  
6.5.6  
Matrox Millenium G400-SG AGP  
Colors Supported  
Refresh Rate 16-MB SGRAM  
Resolution  
2048 x 1536  
1920 x 1440  
1920 x 1080  
1800 x 1440  
1600 x 1200  
1280 x 1024  
1152 x 864  
1024 x 768  
800 x 600  
65 Hz  
75 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
16.7M  
16.7M  
16.7M  
16.7M  
16.7M  
16.7M  
16.7M  
16.7M  
16.7M  
16.7M  
640 x 480  
6.5.7  
Integrated Intel 3D Graphics  
Colors Supported  
Refresh Rate 4-BM SDRAM  
Resolution  
1600 x 1200  
1280 x 1024  
1152 x 864  
1024 x 768  
800 x 600  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
85 Hz  
256  
16.7M  
16.7M  
16.7M  
16.7M  
16.7M  
640 x 480  
Compaq Deskpro EP Series of Personal Computers  
6-11  
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6.6  
Audio Controllers  
440BX  
440BX  
ESS 1869 ISA 16-bit full  
duplex audio with Compaq  
Premier!Sound  
Creative Labs SoundBlaster  
128V PCI with Compaq  
Premier!Sound.  
4 kHz to 48 kHz (adjustable) 48 kHz  
Sampling rate  
Full Scale Input Voltage (rms)  
Microphone-In  
0.050  
1.0  
0.1  
2.0  
Line-Input  
Full Scale Output Voltage (rms)  
1.0  
2.35  
Line Output  
Dynamic Range (DR)  
Digital Playback  
Digital Record  
81 dB  
77 dB  
89 dB  
87 dB  
Total Harmonic Distortion + Noise  
Digital Playback  
-65 dB  
-65 dB  
-80 dB  
-82 dB  
Digital Record  
Frequency Response (-3 dB cutoffs)  
Line Level (48 kHz)  
20 Hz to 20,000 Hz  
200 Hz to 15,000 Hz  
20 Hz to 20,000 Hz  
200 Hz to 15,000 Hz  
Speaker  
Crosstalk (dB)  
63 dB  
92 dB  
Line Output  
Impedance (nominal)  
Microphone-In  
Line-Out  
100-k ohms  
5-k ohms  
10 Kohms  
10 Kohms  
Data Types  
PCM  
8-/16-bit (mono/stereo)  
8-/16-bit (mono/stereo)  
16-bit (mono/stereo)  
8-/16-bit (mono/stereo)  
8-/16-bit (mono/stereo)  
8-/16-bit (mono/stereo)  
A-Law  
µ-Law  
6-12  
Specifications  
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Intel 810/810e  
Integrated AC ’97 audio with  
Compaq Premier!Sound  
7 kHz to 48 kHz (adjustable)  
Sampling rate  
Full Scale Input Voltage (rms)  
Microphone-In  
0.100  
2.15  
Line-Input  
Full Scale Output Voltage (rms)  
1.40  
Line Output  
Dynamic Range (DR)  
Digital Playback  
Digital Record  
91 dB  
87 dB  
Total Harmonic Distortion + Noise  
Digital Playback  
-68 dB  
-77 dB  
Digital Record  
Frequency Response (-3 dB cutoffs)  
Line Level (48 kHz)  
20 Hz to 20,000 Hz  
200 Hz to 15,000 Hz  
Speaker  
Crosstalk (dB)  
70 dB  
Line Output  
Impedance (nominal)  
Microphone-In  
Line-Out  
10-k ohms  
800 ohms  
Data Types  
PCM  
8-/16-bit (mono/stereo)  
8-/16-bit (mono/stereo)  
16-bit (mono/stereo)  
A-Law  
µ-Law  
Compaq Deskpro EP Series of Personal Computers  
6-13  
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chapter 7  
SERVICE NOTES  
CAUTION: Use safety glasses equipped with side shields before attempting to clean debris from  
under the keys.  
1. As of January 1, 1999, all 300-MHz and faster Celeron and Pentium processors are  
shipped with the processor speeds preset. This preset processor speed will override any  
switch settings on the system board.  
2. Compaq Deskpro EP CTO units are shipped with Compaq PC Diagnostics 10.27D  
preinstalled. This version fails to recognize the 22.6-GB Ultra ATA hard drive and fails  
the drive test when the 22.6-GB hard drive is installed. To correct the problem,  
download and install Compaq PC Diagnostics 10.28A or later from the Compaq Web  
site at http://www.compaq.com. The problem appears only when running Diagnostics,  
and does not affect the performance of the unit.  
3. After February 23, 1999, all Deskpro EP units with the Intel Pentium II and Pentium  
III processors will be shipped with a new system board and graphics controller. All  
machines with a date code of x908xxxxxxxx or later will use the new system board  
(spare part number 118053-001) and graphics controller (spare part number  
402125-001).  
4. Two gaskets are included in the Deskpro EP Series units to minimize vibration caused  
by the speaker when played at high volumes. The gaskets are located on the access  
panel directly above the speaker and on the bottom of the slot cover closest to the  
speaker.  
5. With added LED support for more accurate field debugging, an LED Error Code Table  
label has been added to the inside hood of the machine.  
6. If the PC contains what appears to be a fan intake/exhaust mounting area on the chassis,  
such as the long option card support, do not install a fan in this area.  
7. A Creative Labs SoundBlaster PCI 128V Audio Board with Compaq Premier!Sound  
(spare part number 167984-001) and audio cable (spare part number 149806-001) will  
be shipped on 440BX units with Windows 98 or Windows NT 4.0 and:  
•
•
PIII 650/100 and 700/100 starting 11/15/99  
PIII 500-MHz and greater starting 11/17/99  
Compaq Deskpro EP Series of Personal Computers  
7-1  
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Index  
CMOS  
A
E
clearing, 5-8  
SW50 location (Intel  
810/810e), 5-9  
access panel  
electrostatic damage, preventing,  
3-3  
electrostatic discharge, 3-3  
Expansion slots  
spare part number (440BX),  
2-3  
CMOS, clearing  
spare part number (Intel  
810/810e), 2-5  
audio controller, specifications  
440BX, 6-12  
440BX, 5-6  
440BX, 4-24  
Intel 810 and 810e, 4-25  
Intel 810/810e, 5-9  
Computer Features  
Front Panel Controls and  
LEDs (440BX), 1-5  
Front Panel Controls and  
LEDs (Intel 810), 1-6  
Rear Panel Connectors -  
440BX, 1-7  
Intel 810, 6-13  
F
feet  
B
battery  
removal and replacement,  
4-3  
proper disposal, 4-44  
Battery  
locating on system board,  
4-42  
bezels  
spare part number, 2-3, 2-5  
front bezel  
spare part number, 2-3, 2-5  
Front Panel Controls and LEDs  
440BX, 1-5  
Intel 810/810e, 1-6  
Fujitsu EIDE hard drive  
jumper settings, 5-11  
Rear Panel Connectors -  
Intel 810/810e, 1-8  
configuration, 4-12  
connector  
service considerations, 3-5  
connector location  
440BX, 2-DIMM board,  
5-2  
spare part number, 2-3, 2-5  
boxes, shipping, 2-19  
440BX, 3-DIMM system,  
5-1  
Intel 810/810e, 2-DIMM  
board, 5-3  
C
G
cable select feature, 4-13, 5-10,  
5-11  
cables, 3-5  
generating static, 3-3  
graphics resolution  
ATI RAGE PRO 1X AGP,  
6-9  
service considerations, 3-5  
spare part numbers, 2-9  
CD-ROM  
spare part number, 2-7  
specifications, 6-7  
chassis/basepan  
spare part number (440BX),  
2-3  
D
ATI RAGE PRO IIC AGP,  
6-10  
Integrated Intel 3D  
Graphics, 6-11  
Matrox MGA G100 AGP,  
6-10  
Matrox Millenium G200-  
SD AGP, 6-11  
device drivers  
ordering, 1-4  
disassembly chart, 4-1  
diskette drive  
spare part number, 2-7  
specifications, 6-5  
DMA  
specifications, 6-3  
documentation, spare part  
numbers, 2-19  
spare part number (Intel  
810/810e), 2-5  
cleaning  
NVIDIA RIVA 128 AGP,  
6-10  
computer case, 3-1  
keyboard, 3-2  
monitor, 3-2  
grounding  
drive bay bezel  
methods, 3-4  
workstations, 3-4  
spare part number, 2-3, 2-5  
drive positions, 1-9  
DVD-Drive  
mouse, 3-2  
precautions, 3-1  
clearing CMOS, 5-8  
spare part number, 2-7  
Index I-1  
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models, 1-2  
monitor  
cleaning, 3-2  
mouse  
cleaning, 3-2  
H
hard drive  
S
screws, service considerations,  
3-5  
Seagate EIDE hard drive  
jumper settings, 5-11  
serial number  
jumper settings, 5-10  
proper handling, 3-6  
spare part number, 2-7  
spare part number, 2-18  
specifications, 6-9  
need for service call, 1-4  
serial number location  
desktop, 1-10  
service considerations, 3-5  
shipping boxes  
spare part numbers, 2-19  
software  
preloaded, 1-4  
spare part number  
battery, 2-18  
I
O
I/O  
specifications, 6-3  
INSPECT utility, 1-9, 4-12  
interrupts  
operating system  
ordering device drivers, 1-4  
specifications, 6-2  
P
passwords  
J
disabling or clearing  
(440BX), 5-6  
disabling or clearing (Intel  
810/810e), 5-8  
documentation, 2-19  
fan, 2-18  
mounting brackets, 2-18  
speakers, 2-18  
jumper location  
440BX, 2-DIMM board,  
5-2  
440BX, 3-DIMM board,  
5-1  
E49 (Intel 810/810e), 5-7  
E50 (440BX), 5-5  
Intel 810/810e, 2-DIMM  
board, 5-3  
plastic parts  
service considerations, 3-6  
power supply  
specifications  
CD-ROM, 6-7  
Compaq enhanced  
keyboard, 6-9  
diskette drive, 6-5  
DMA, 6-3  
I/O, 6-3  
interrupts, 6-2  
memory map, 6-5  
mouse, 6-9  
spare part number (440BX),  
2-3  
spare part number (Intel  
810/810e, 2-5  
spare part number (Intel  
810/810e), 2-5  
K
keyboard  
power switch  
spare part numbers, 2-15  
specifications, 6-9  
spare part number, 2-3  
preloaded software, 1-4  
preventing electrostatic damage,  
3-3  
system, 6-1  
Ultra ATA hard drive, 6-6  
standard and optional boards  
spare parts, 2-11  
static  
L
processor  
logo  
spare part number, 2-11  
generating, 3-3  
shielding protection levels,  
3-4  
spare part number, 2-3, 2-5  
R
M
switch location  
440BX, 2-DIMM board,  
5-2  
removal and replacement  
feet, 4-3  
routine care  
major differences between  
440BX and 810/810e, 2-3  
mass storage devices  
spare part numbers, 2-7  
materials, static preventing, 3-4  
Maxtor EIDE hard drive  
settings, 5-12  
440BX, 3-DIMM board,  
5-1  
Intel 810/810e, 2-DIMM  
board, 5-3  
computer, 3-1  
SW1 (440BX), 5-4  
switch settings  
memory map  
SW1 (440BX), 5-4  
specifications, 6-5  
miscellaneous hardware  
spare parts, 2-16, 2-17  
I-2 Index  
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system  
design, 1-3  
specifications, 6-1  
system board  
spare part number, 2-11  
System memory  
440BX, 4-30  
810/810e, 4-30  
system unit  
spare part numbers, 2-3, 2-5  
T
tools  
service considerations, 3-5  
U
Ultra ATA devices, 4-13  
Ultra ATA hard drive  
specifications, 6-6  
W
Western Digital EIDE hard drive  
jumper settings, 5-11  
Index I-3  
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181099-001  
134011-004  
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