Compaq EP User Manual

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Maintenance & Service Guide

Compaq Deskpro EP Series of Personal Computers

Guide to Features & Upgrades

Compaq Deskpro EP Series of Personal Computers

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.

Compaq, the Compaq logo, and Deskpro Registered U. S. Patent and Trademark Office.

PREMIER

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.

SOUND is a trademark of Compaq Computer 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

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

ONTENTS

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

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

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

Index

............................................................................................................................................... I-1

..................................................................................................................................... 7-1

Contents v

preface

BOUT THIS GUIDE

This

Maintenance & Service Guide

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:

could result in bodily harm or loss of life.

CAUTION:

damage to equipment or loss of data.

Text set off in this manner presents commentary, sidelights, clarifying information, or specific instructions.

Text set off in this manner indicates that failure to follow directions in the warning

Text set off in this manner indicates that failure to follow directions could result in

Technician Notes

WARNING:

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.

Only authorized technicians trained by Compaq should attempt to repair this

is a troubleshooting and repair guide that can be used

WARNING:

•

Disconnect the power from the computer by unplugging the power cord either from the electrical outlet or the computer.

CAUTION:

the AC power cord into a properly grounded AC outlet only.

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.

The computer is designed to be electrically grounded. To ensure proper operation, plug

Compaq Deskpro EP Series of Personal Computers vii

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

chapter

RODUCT 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

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

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

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

! Intelligent Manageability

! Power Management with Energy Saver features

! Security Management

! Remote Management Tools

! Microsoft Internet Explorer

Safety & Comfort Guide

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

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.

Support Software CD for Compaq Desktop Products.

(English only)

This compact disc

! Download the software from the Compaq World Wide Web site

(www.compaq.com).

Purchase backup diskettes.

The

Support Software CD

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.

✎

1-4 Product Description

can be purchased in either of two ways:

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 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

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.

CD-ROM Volume Control*

CD-ROM Headphone Jack*

Dual-State Power Button

Drive Activity Light**

Compaq Deskpro EP Series of Personal Computers 1-5

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

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.

CD-ROM Drive Busy Indicator*

Headphone Volume Control

Stereo Headphone Jack

Dual-State Power Button

Drive Activity Light**

1-6 Product Description

1.4.3 Rear Panel Connectors - 440BX

Rear Panel Connectors - 440BX

Ref. Component Component

Power Cord Connector

Voltage Select Switch (switches

voltage between 115V and 230V to match geographical requirements)

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)

Keyboard Connector

Mouse Connector

Parallel Port Connector

Audio features are available on select models only.

;

Serial Connectors (2)

Monitor Connector

Headphone Connector*

Line-Out Audio Connector*

Line-In Audio Connector*

Microphone Connector *

Compaq Deskpro EP Series of Personal Computers 1-7

1.4.4 Rear Panel Connectors - Intel 810/810e

Rear Panel Connectors - Intel 810/810e

Ref. Component Ref. Component

Power Cord Connector

Voltage Select Switch (switches

voltage between 115V and 230V to match geographical requirements)

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 Connectors

Keyboard Connector*

Mouse Connector*

Monitor Connector

*Keyboard and mouse ports are interchangeable

;

Headphone Connector

Line-Out Audio Connector

Serial Number

Line-In Audio Connector

Microphone Connector

Parallel Port Connector

1-8 Product Description

1.4.5 Drive Positions

Drive Positions

Reference Drive Bay Configuration

1, 2

4, 5

✎

1, 2 Two standard 5.25-inch, half-height bays for optional drives

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

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 1-9

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.

✎

The computer serial number should be provided to Compaq when requesting information or ordering spare parts.

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:

number and will create a mismatch between the serial number label and the electronic serial number.

A system board borrowed from another computer is recognized as a valid serial

1-10 Product Description

chapter

SPARE P ARTS

Compaq Deskpro EP Series of Personal Computers

Compaq Despro EP Series of Personal Computers 2-1

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.

2.1 System Unit

2.1.1 System Unit - 440BX

System Unit Spare Parts - 440BX Model

2-2 Spare Parts

System Unit Spare Parts - 440BX

Description Spare Part Number

1 Access panel 166867-001 2 Front bezel, complete with subpanel and bezel blanks 166868-001 3 Power supply, 200 Watt 166814-001 3 Power supply, 145 Watt 332863-001 4 Logo Kit, Deskpro EP (1 ea., DT and MT) 166924-001 5 Feet Miscellaneous Plastics 6 Power switch with cable, LED and switch holder (3 ea.) 166925-001 7 Chassis/basepan (repair/exchange only) 166880-001

Major Differences Between 440BX and Intel 810/810e

System Board Assembly

440BX, PII, two-DIMM model, 332857-001 (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 three-DIMM model 164483-001 (PCA 010582-101)

Intel 810, Celeron 401963-001 (PCA 010174-101)

Intel 810e, Celeron 164122-001 (PCA 010546-101)

Intel 810e, Celeron 187672-001 (PCA 010697-101)

Power Supply 145 Watt

332863-001 166814-001 166867-001 166880-001 166838-001

n/a 103748-001 137384-001 Not spared 143218-001

174871-001 n/a 137384-001 Not spared 143218-001

Power Supply 200 Watt

Access Panel

Chassis Assembly

Diskette Drive Cable

Compaq Despro EP Series of Personal Computers

2-3

2.1.2 System Unit - Intel 810/810e

System Unit Spare Parts - Intel 810/810e Model

2-4 Spare Parts

System Unit Spare Parts - Intel 810/810e

Description Spare Part Number

1 Access panel (includes gasket) 137384-001 2 Front bezel, complete with subpanel and bezel blanks 166868-001 3 Power supply, 200W 103748-001

* Power supply, 145W (only used with PCA 010697-101) 174871-001 4 Logo Kit, Deskpro EP (1 ea., DT and MT) 166924-001 5 Feet Miscellaneous Plastics 6 Chassis/basepan (repair/exchange only) Not spared

*Not Shown

Major Differences Between 440BX and Intel 810/810e

System Board Assembly

440BX, PII, two-DIMM model, 332857-001 (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 three-DIMM model 164483-001 (PCA 010582-101)

Intel 810, Celeron 401963-001 (PCA 010174-101)

Intel 810e, Celeron 164122-001 (PCA 010546-101)

Intel 810e, Celeron 187672-001 (PCA 010697-101)

Power Supply 145 Watt

332863-001 166814-001 166867-001 166880-001 166838-001

n/a 103748-001 137384-001 Not spared 143218-001

174871-001 n/a 137384-001 Not spared 143218-001

Power Supply 200 Watt

Access Panel

Chassis Assembly

Diskette Drive Cable

Compaq Despro EP Series of Personal Computers

2-5

2.2 Mass Storage Devices

Mass Storage Devices

2-6 Spare Parts

Mass Storage Devices

Description Spare Part Number

1 2.1-GB Ultra ATA hard drive (33/5400) 332861-001 * 3.2-GB Ultra ATA hard drive (33/5400) 332866-001 * 4.3-GB Ultra ATA hard drive (33/5400) 327646-001 * 4.3-GB Ultra ATA hard drive (66/5400) 134197-001 * 5.1-GB Ultra ATA hard drive (33/5400) 166872-001 * 6.4-GB Ultra ATA hard drive (33/5400) 166973-001 * 6.4-GB Ultra ATA hard drive (66/5400) 134198-001 * 10.0-GB Ultra ATA hard drive (33/5400) 320662-001 * 10.0-GB Ultra ATA hard drive (66/7200) 135364-001 * 10.0-GB Ultra ATA hard drive (66/5400) 134193-001 * 13.5-GB Ultra ATA hard drive (66/7200) 140515-001 * 15.0-GB Ultra ATA hard drive (33/7200) 120419-001 * 20.0-GB Ultra ATA hard drive (33/7200) 120420-001 * 22.6-GB Ultra ATA hard drive (33/7200) 388511-001 2 Diskette drive, 3.5-inch (141087-705), 1.44-MB, 3-mode, 1/3-

height, without bezel, includes drive bay adapter (179026-002) * Diskette drive adapter 180808-001 3 24X Max tray load IDE CD-ROM drive 166869-001 * 32X Max tray load IDE CD-ROM drive 327659-001 * 40X Max tray load IDE CD-ROM drive 400807-001 * 52X Max tray load IDE CD-ROM drive 120696-001 * 60X Max tray load IDE CD-ROM drive 134195-001 * 8X DVD Drive 134196-001

*Not shown (nn/nnnn) = hard drive transfer rate (MBytes/sec)/RPM

179161-001

. 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

2.3 Cables

Cables

2-8 Spare Parts

Cables

Description Spare Part Number

Cable Kit includes: 166879-001

1a Diskette drive cable without twist, 11”

440BX only, (166838-001)

1b Audio cable, 21”, (288489-002)

* IDE hard drive cable, 7”

* IDE hard drive/CD-ROM cable, 14”

2a Diskette drive cable with twist, 11”, with pull tab,

* IDE Ultra ATA hard drive/CD-ROM cable, 10”, with pull tab,

* 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”

* RTF card for EP diskette drive cable (157354-001) * Diskette drive cable with twist, 11”, without pull tab

3 Cable, IDE CD-ROM/hard drive, 14-inch, 80-conductor 278296-001 4 Power cord, AC, black (US, LA, Asia/Pacific, Brazil) 142766-001

* NIC Remote Wakeup cable 166974-001 * Power switch with cable and switch mounting bracket

* Audio cable, 25”.

* Video cable for P1610W color monitor 305717-001

*Not shown

440BX only, (247116-001)

440BX only, (242947-001)

Cable Kit (use on Intel 800 series products) includes: 166879-002

center polarization (143218-001)

center polarization, (108950-007)

Opt. (356107-001)

(387795-001)

(440BX and 810e PCA=010697-101 only) (3 ea.)

Use with Creative Labs SoundBlaster PCI 128V Audio Board.

166925-001

149806-001

Compaq Despro EP Series of Personal Computers 2-9

2.4 Standard and Optional Boards

Standard and Optional Boards

2-10 Spare Parts

Standard and Optional Boards

Description Spare Part Number

1a PII System board, three-DIMM model (440BX)

(PCA=009635-101).

PII System board, two-DIMM model (440BX)

(PCA=008312-101).

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

* Intel 810e System Board (PCA=010546-101). 161422-001 * Intel 810e System Board (PCA=010697-101). 187672-001 * 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

Processor, Celeron 333/66 w/heatsink. 356082-001

Processor, Celeron 366/66 w/28K cache, heatsink. 103253-001

Processor, Celeron 400/66 w/128K cache, heatsink. 402126-001

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.

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

Processor, PII 300/66 w/heatsink. Use on 2-DIMM board. 166881-001

Processor, PII 333/66 w/heatsink. 166887-001

2a Processor, PII 350/100 w/heatsink. Use on 3-DIMM board. 166874-001

Processor, PII 400/100 w/heatsink. Use on 3-DIMM board. 166882-001

Processor, PII 450/100 w/heatsink. 167032-001

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.

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),

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 thermal

interface. Use on 010697-101 system board.

*Not shown

166813-001

332857-001

118053-001

164483-001

103747-001

176740-001

155379-001

176741-001

122735-001

164400-001

116401-001

164401-001

176742-001

Continued

2-11

Standard and Optional Boards, continued

2-12 Spare Parts

Standard and Optional Boards Continued

101 system

atsink, clip, and thermal

Description Spare Part Number

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.

Processor, PIII, 550/100 (352772-006), w/heatsink (401405-001),

and thermal compound (243199-002). Use on 010233-

board.

Processor, PIII, 550/100 (158353-002), w/he

interface. Use on 010697-101 system board. * Processor, PIII, 600/133, (137365-001), w/heatsink (401405-003),

keyed heatsink clip (120891-001), spacer (168092-001), retention

mechanism (350767-005). Use on 010546-101 system board.

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.

Processor, PIII, 667/133, (137365-002), w/heat sink (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 * 32-MB 278067-001 * 64-MB 278095-001 * Memory Module, DIMM, 66 MHz with ECC

16-MB 278097-001

32-MB 288440-001

64-MB 278098-001

128-MB 278099-001 * Memory Module, DIMM, 100 MHz

16-MB 166969-001

32-MB 166890-001

64-MB 179190-001

128-MB 166966-001 * Memory Module, DIMM, 100 MHz with ECC

16-MB 166964-001

32-MB 166968-001

64-MB 166967-001

128-MB 166965-001

164402-001

133840-001

176743-001

164403-001

176744-001

155592-001

164568-001

161671-001

164568-001

Compaq Despro EP Series of Personal Computers 2-13

Standard and Optional Boards Continued

Description Spare Part Number

4 ATI RAGE PRO GRAPHICS 1X 166871-001

ATI RAGE PRO GRAPHICS 2X 166970-001

ATI RAGE PRO GRAPHICS IIC 332865-001

Matrox MGA G100 AGP graphics board 328011-001

Matrox Millenium G200-SD graphics card with 8-MB memory

402125-001

(shipped on all PII and PIII units after 2/23/99) Matrox Millenium G200-SD graphics card with 8-MB memory

167033-001 * Matrox Millenium G400 graphics card with 16-MB memory 400437-001 5 33.6k Modem 294912-001

56k Modem 292269-003

* 6 NVIDIA Graphics 166982-001 7 ATI Graphics memory upgrade, 2-MB for use on 166871-001 166971-001

ATI Graphics memory upgrade, 4-MB for use on 166970-001 166972-001

* 8 ESS 1869 ISA Audio Board (440BX). Use on speaker 166507-001 332859-001

Creative Labs SoundBlaster PCI 128V Audio Board with Compaq

167984-001

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

* * Compaq PREMIER•SOUND board

356081-001

(for use with speaker 167029-001)

*Not shown

2-14 Spare Parts

2.5 Keyboards

Description Spare Part Number

* Arabic 269513-171 * Belgian 269513-181 * Brazilian 269513-201 * BHCSY (Bosnia-Herzegovina, Croatia, Slovenia, and

Yugoslavia) * Czech 269513-221 * Danish 269513-081 * Finnish 269513-351 * French 269513-051 * French Canadian 269513-121 * German 269513-041 * Greek 269513-151 * Hungarian 269513-211 * Italian 269513-061 * Japanese 269513-191 * Korean (Hanguel) 269513-AD1 * International 269513-B31 * Latin American Spanish 166984-161 * Norwegian 269513-091 * Polish 269513-241 * Portuguese 269513-131 * Russian 269513-251 * Slovakian 269513-231 * Spanish 269513-071 * Swedish 269513-101 * Swiss 269513-111 * Taiwanese 269513-AB1 * Thai 269513-281 * Turkish 269513-141 * UK 269513-031 * US 166984-001

*Not shown

Keyboards

269513-B41

Compaq Despro EP Series of Personal Computers 2-15

2.6 Miscellaneous Hardware Kit

Miscellaneous Hardware Kit

Miscellaneous Hardware

Description Spare Part Number Miscellaneous hardware kit. Includes: 166877-001

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) * I/O Panel for Intel 810e – PCA=010697-101 (166808-002) 3 Fan guard (105427-003) 4 Screw, 6/32 pan head x 1/4 inch (4 ea.) (192308-001) 5 Thumbscrew (2 ea.) (440BX) (197436-001) * Thumbscrew (2 ea.) (Intel 810/810e) (124702-001) 6 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 * Gasket (247347-072)

(for use on 101144-001 slot cover inserted in 7th slot)

* Gasket (304477-037)

(for use on Int el 810 access panel, 137384-001)

*Not shown

2-16 Spare Parts

2.7 Miscellaneous Plastics Kit

Miscellaneous Plastics Kit

Miscellaneous Plastics Kit, Desktop and Minitower

Description Spare Part Number Miscellaneous plastics kit includes: 166878-001

1 Diskette bezel (166776-001) 2 Foot, rubber (4 ea.) (166939-002) 3 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 Bezel, blank (2 ea.) (166775-001) 6 Panel, sub (166835-001) 7 Button, power (166774-001) 8 Spring, power button (166837-001) 9 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

2.8 Miscellaneous Parts

450/100 and above and all Pentium III units 450/100 and above)

Miscellaneous Parts

1 Two-button mouse 166861-001 * Compaq Intellimouse 317863-001 2 Cable lock bracket 199109-001 3 Battery (440BX) 234556-001 * Battery (Intel 810)

(for use on system board 401963-001) 4 Fan assembly with four plastic pins (for use on Pentium II units

153099-001

166922-001

2-18 Spare Parts

* Chassis fan cover 166847-001

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) * Speaker (40mm x 70mm), (Intel 810) (356080-002) 158267-001 * Speaker (40mm x 70mm), (Intel 810e) (174920-001) 180809-001 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) * 3.5- to 5.25-Inch hard drive mounting bracket 243231-001 * 3.5- to 5.25-Inch ½ height mounting bracket for use in bays

1 and 2 only

*Not shown

167029-001

166507-001

166925-001

166923-001

243230-002

2.9 Shipping Boxes

Shipping Boxes (not illustrated)

Description Spare Part Number

Return Kit with buns (U.S.) 166990-001 Return Kit (international) 166990-002

2.10 Documentation and Software

Documentation and Software (not illustrated)

Description Spare Part Number

Maintenance & Service Guide (desktop & minitower) 180999-001 Deskpro Service Reference Guide 152611-001 Windows 98 Country Kit 165534-001 Windows 95 Country Kit 165535-001 Windows NT Country Kit 165536-001

Compaq Despro EP Series of Personal Computers 2-19

chapter

EMOVAL 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

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:

under the keys.

! Visible debris underneath or between the keys may be removed by vacuuming or

Use safety glasses equipped with side shields before attempting to clean debris from

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:

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.

Never remove a wide leveled key (like the space bar) from the keyboard. If these keys

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 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.

3.1.5 Cleaning the Mouse

Before cleaning the mouse, ensure that the power to the computer is turned off.

Clean the mouse ball by first removing the retaining plate and the ball from the

housing. Pull out any debris from the ball socket and wipe the ball with a clean dry cloth before reassembly.

To clean the mouse body, follow the procedures in Section 3.1.2.

3-2 Removal and Replacement Preliminaries

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.

✎

Event 10% 40% 55%

Walking across carpet 35,000 V 15,000 V 7,500 V

Walking across vinyl floor 12,000 V 5,000 V 3,000 V

Motions of bench worker 6,000 V 800 V 400 V

Removing DIPs* from plastic tube 2,000 V 700 V 400 V

Removing DIPs* from vinyl tray 11,500 V 4,000 V 2,000 V

Removing DIPs* from Styrofoam 14,500 V 5,000 V 3,500 V

Removing bubble pack from PCB 26,500 V 20,000 V 7,000 V

Packing PCBs in foam-lined box 21,000 V 11,000 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.

700 volts can degrade a product.

Relative Humidity

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.

Compaq Deskpro EP Series of Personal Computers 3-3

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

Antistatic plastic 1,500

Carbon-loaded plastic 7,500

Metallized laminate 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

3-4 Removal and Replacement Preliminaries

! 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 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.

3.3.3 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:

during the reassembly process. Improper cable placement can damage the computer.

When servicing this computer, ensure that cables are placed in their proper location

Compaq Deskpro EP Series of Personal Computers 3-5

3.3.4 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.

3.3.5 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 Removal and Replacement Preliminaries

chapter

EMOVAL 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 Computer Feet

4.4 Logo Plate

4.5 Cable Lock

4.6 Access Panel

4.7 Front Bezel

4.8 Power Button

4.9 Subpanel and Bezel Blanks

4.10 Power Switch

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 Removing the Drivelocks

4.13.3 Removing an Expansion Board

4.14 Board Guide

4.15 System Memory

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 System Board

4.19 Internal Speaker

4.20 Lithium Battery

4.21 Fan Assembly

4.22 Power Supply

4.23 Converting a Desktop to a Minitower

4.24 Converting a Minitower to a Desktop

Compaq Deskpro EP Series of Personal Computers 4-1

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:

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:

Power is continuous to the system board and power supply even when the power

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:

wrong screw in an application may damage the unit.

WARNING:

components to cool before touching.

CAUTION:

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

The screws used in the computer are of different thread sizes and lengths; using the

To reduce the risk of personal injury from hot surfaces, allow the internal system

Static electricity can damage the electronic components of the computer or optional

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 Removal and Replacement Procedures

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

Compaq Deskpro EP Series of Personal Computers 4-3

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

4-4 Removal and Replacement Procedures

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

Compaq Deskpro EP Series of Personal Computers 4-5

Installing the Cable Lock Provision - Intel 810/810e

To remove the cable lock provision, reverse the above procedure.

4-6 Removal and Replacement Procedures

4.6 Access Panel

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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.

Compaq Deskpro EP Series of Personal Computers 4-7

4.7 Front Bezel

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

Removing the Front Bezel

✎

4-8 Removal and Replacement Procedures

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 Power Button

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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.

Compaq Deskpro EP Series of Personal Computers 4-9

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:

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.

Power is continuous to the system board and power supply even when the power

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:

angle could damage the pins that align the subpanel within the front bezel.

Hold the subpanel straight when you pull it away from the front bezel. Pulling at an

6. Gently push on the bezel blanks to remove them from the subpanel.

Removing the Subpanel and Bezel Blanks

CAUTION:

blanks are in the proper orientation to prevent damage to the alignment pins.

✎

4-10 Removal and Replacement Procedures

The subpanel has markings on it to facilitate installation.

When replacing the subpanel, ensure that the aligning pins and any remaining bezel

4.10 Power Switch

CAUTION:

damage the switch components.

The power switch should not be removed from the switch holder. Doing so may

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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.

Compaq Deskpro EP Series of Personal Computers 4-11

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

✎

To verify the type and size of the mass storage devices installed in the computer, run Computer Setup.

1, 2 Two standard 5.25-inch, half-height bays for optional drives.

4, 5

One standard 3.5-inch, 1.44-MB diskette drive mounted with a drive adapter into a 5.25-inch bay.

Two standard 3.5-inch drive bays; bay 4 contains the preinstalled hard drive, bay 5 is available for an optional hard drive.

Drive bay numbers are stamped on the chassis.

4-12 Removal and Replacement Procedures

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.

Compaq Deskpro EP Series of Personal Computers 4-13

4.11.1 Removing an Internal 3.5-Inch Hard Drive

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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

4-14 Removal and Replacement Procedures

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.

✎

Replace the 3.5-inch drive by reversing the above procedure.

✎

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 thirdparty hard drive, or one that is not a plug and play device, you must run Computer Setup to reconfigure the computer.

Metric screws (M3) have a black finish while U.S. screws have a silver finish.

CAUTION:

during the reassembly process. Improper cable placement can damage the computer.

CAUTION:

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.

When servicing the computer, ensure that cables are placed in their proper locations

Use only 3/16-inch or 5-mm long screws as guide screws. Longer screws can damage

Compaq Deskpro EP Series of Personal Computers 4-15

4.11.2 Removing an External 5.25-Inch Drive

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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

4-16 Removal and Replacement Procedures

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.

Compaq Deskpro EP Series of Personal Computers 4-17

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 80conductor ATA cable for optimal performance (spare part number 278296-001).

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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 drives; if a minitower, press drivelock 2.

The primary diskette drive is always installed in drive bay 3.

Power is continuous to the system board and power supply even when the power

Releasing the Drives

4-18 Removal and Replacement Procedures

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

Compaq Deskpro EP Series of Personal Computers 4-19

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:

during the reassembly process. Improper cable placement can damage the computer.

CAUTION:

the internal components of the drive.

When servicing the computer, ensure that cables are placed in their proper locations

Use only 3/16-inch or 5-mm long screws as guide screws. Longer screws can damage

4-20 Removal and Replacement Procedures

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

Compaq Deskpro EP Series of Personal Computers 4-21

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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

4-22 Removal and Replacement Procedures

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

Compaq Deskpro EP Series of Personal Computers 4-23

4.13 Expansion Boards

4.13.1 440BX

Deskpro EP Expansion Slots - 440BX (2-DIMM Model)

Deskpro EP Expansion Slots - 440BX (3-DIMM Model)

ISA expansion slots

ISA/PCI shared expansion slots

PCI expansion slots

AGP graphics slot

4-24 Removal and Replacement Procedures

4.13.2 Intel 810 and 810e

Deskpro EP Expansion Slots - Intel 810

Deskpro EP Expansion Slots - Intel 810e

ISA expansion slot

ISA/ISA shared expansion slots

PCI expansion slots

✎

Your 810e system board may differ from the one shown.

Compaq Deskpro EP Series of Personal Computers 4-25

4.13.3 Removing an Expansion Board

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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

4.13.4 Installing an Expansion Board

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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

Compaq Deskpro EP Series of Personal Computers 4-27

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.

✎

8. Reassemble the computer.

The computer should automatically recognize the added plug and play board.

If installing a NIC board, attach the WOL power cable to connector P9 on the system board.

4-28 Removal and Replacement Procedures

4.14 Board Guide

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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.

Compaq Deskpro EP Series of Personal Computers 4-29

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 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

Software Reference Guide

for

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:

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:

boards. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object.

CAUTION:

so can damage the module.

The DIMM sockets have gold metal contacts. When upgrading memory, it Is important

Static electricity can damage the electronic components of the computer or optional

When handling a memory module, be careful not to touch any of the contacts. Doing

4-30 Removal and Replacement Procedures

To install a memory module, complete the following steps:

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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.

Compaq Deskpro EP Series of Personal Computers 4-31

4.16 AGP Graphics Board (440BX)

4.16.1 AGP Graphics Board Removal (440BX)

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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).

Power is continuous to the system board and power supply even when the power

Removing the RAGE PRO Graphics Board

To install the graphics board, reverse the above procedure.

4-32 Removal and Replacement Procedures

4.16.2 Graphics Memory Upgrade (440BX)

✎

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. 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.

It is not necessary to remove the graphics board to install the memory upgrade module.

WARNING:

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.

Power is continuous to the system board and power supply even when the power

Installing the Memory Module

5. Replace the access panel.

6. Reassemble the computer.

7. Customize the monitor display through the Control Panel.

Compaq Deskpro EP Series of Personal Computers 4-33

4.17 Processor Components

4.17.1 Processor

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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:

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.

Power is continuous to the system board and power supply even when the power

To reduce the risk of personal injury from hot surfaces, allow the internal system

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.

✎

4-34 Removal and Replacement Procedures

It may be necessary to remove the graphics board before removing this processor.

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

Compaq Deskpro EP Series of Personal Computers 4-35

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

4.17.2 Processor Guide Rails

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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

Compaq Deskpro EP Series of Personal Computers 4-37

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

4.18 System Board

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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.

Compaq Deskpro EP Series of Personal Computers 4-39

4.19 Internal Speaker

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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

4-40 Removal and Replacement Procedures

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.

Compaq Deskpro EP Series of Personal Computers 4-41

4.20 Lithium Battery

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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 Removal and Replacement Procedures

Locating the Battery on the System Board - Intel 810

Locating the Battery on the System Board - Intel 810e

Compaq Deskpro EP Series of Personal Computers 4-43

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:

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

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.

This computer contains a lithium-ion battery pack. There is a risk of fire and chemical

Contacting Customer Support

guide for more information.

4-44 Removal and Replacement Procedures

4.21 Fan Assembly

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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.

Compaq Deskpro EP Series of Personal Computers 4-45

4.22 Power Supply

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

✎

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.

Power connectors are keyed for correct installation. Note the orientation of each cable connector and the routing of the cables to facilitate reassembly.

Power is continuous to the system board and power supply even when the power

Removing the Power Supply - 440BX

4-46 Removal and Replacement Procedures

Removing the Power Supply - Intel 810/810e

To replace the power supply, reverse the above procedure.

Compaq Deskpro EP Series of Personal Computers 4-47

4.23 Converting a Desktop to a Minitower

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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)

4-48 Removal and Replacement Procedures

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.

Compaq Deskpro EP Series of Personal Computers 4-49

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:

subpanel away at an angle could damage the pins that align it within the front bezel.

Hold the subpanel straight when you pull it away from the front bezel. Pulling the

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 Removal and Replacement Procedures

4.24 Converting a Minitower to a Desktop

1. Prepare the computer for disassembly (Section 4.2).

WARNING:

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.

Power is continuous to the system board and power supply even when the power

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)

Compaq Deskpro EP Series of Personal Computers 4-51

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.

4-52 Removal and Replacement Procedures

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:

subpanel away at an angle could damage the pins that align it within the front bezel.

Hold the subpanel straight when you pull it away from the front bezel. Pulling the

Converting a Minitower 2 to a Desktop

10. Replace the subpanel, front bezel, and the computer access panel.

Reassemble the computer.

Compaq Deskpro EP Series of Personal Computers 4-53

chapter

ONNECTORS

UMPERS, AND SWITCHES

, J

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 Description

CR114 AUX LED P1 Power Supply Connector

E50 CMOS Header P5 Power Switch and LED Connector

J1 DIMM 1 Expansion Slot P8 Chassis Fan Connector

J2 DIMM 2 Expansion Slot P9 Wake on LAN Header

J3 DIMM 3 Expansion Slot P10 Diskette Drive Connector

J10 PCI/ISA Dual Expansion Slot (combo) P20 IDE Connector (primary)

J11 ISA Expansion Slot P21 IDE Connector (secondary)

J20 PCI Expansion Slot P24 Not used

J21 PCI Expansion Slot P55 Not Used

J22 PCI Expansion Slot Slot 1 Processor Connector

J23 PCI Dual Expansion Slot (combo) SW1 Processor Speed and Feature Switch

J40 AGP Video Graphics Slot

Compaq Despro EP Series of Personal Computers 5-1

System Board Overview - 440BX (Two-DIMM Board)

Connectors, Jumpers, and Switches - 440BX (Two-DIMM Board)

Item Description Item Description

CR114 AUX LED J40 AGP Video Graphics Slot

E50 CMOS Header P1 Power Supply Connector

J1 DIMM 1 Expansion Slot P5 Power Switch and LED Connector

J2 DIMM 2 Expansion Slot P8 Chassis Fan Connector

J10 ISA Expansion Slot P9 Wake on LAN Header

J11 ISA Expansion Slot P10 Diskette Drive Connector

J12 PCI/ISA Dual Expansion Slot (combo) P20 IDE Connector (primary)

J20 PCI Expansion Slot P21 IDE Connector (secondary)

J21 PCI Expansion Slot Slot 1 Processor Connector

J22 PCI Dual Expansion Slot (combo) SW1 Processor Speed and Feature Switch

Connectors, Jumpers, and Switches - Intel 810e (PCA=010697-101)*

Item Description Item Description

J7H1 Clear Password J7J1 Power Supply Connector

J4C1 PCI Expansion Slot 1 J8F1 Power Switch and LED Connector

J4B1 PCI Expansion Slot 2 J6K1 Chassis Fan

J4A1 PCI Expansion Slot 3 J2D5 Audio-In Header

J4A2 PCI Dual Expansion Slot (combo) J9F2 IDE Connector (primary)

J4D1 AGP Expansion Slot J9F1 IDE Connector (secondary)

J10F1 Diskette Drive Connector J9G3 Wake on LAN Header

* Not shown

5-2 Connectors, Jumpers, and Switches

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

XMM1 DIMM 1 Expansion Slot P6 Chassis Fan

XMM2 DIMM 2 Expansion Slot P7 CD-In Header

J10 ISA Dual Expansion Slot 1 (combo) P8 Chassis Fan Connector

J11 ISA Expansion Slot 2 P9 Wake on LAN Header

J20 PCI Expansion Slot 1 P10 Diskette Drive Connector

J21 PCI Expansion Slot 2 P20 IDE Connector (primary)

J22 PCI Expansion Slot 3 P21 IDE Connector (secondary)

J23 PCI Expansion Slot 4 XU1 Processor Connector

J24 PCI Dual Expansion Slot 5 (combo) SW50 CMOS Button

Compaq Despro EP Series of Personal Computers 5-3

5.1.2 Switches

Location of SW1 DIP Switches on the System Board - 440BX

Switch SW1 Settings (440BX)

Password Control

Disable Password

Enable Password (Default setting)

Processor Speed S2 S3 S4 S5

233/66 MHz OFF OFF ON ON

266/66 MHz ON ON OFF ON

300/66 MHz ON OFF OFF ON

333/66 MHz (maximum) OFF ON OFF ON

350/100 MHz OFF OFF ON ON

400/100 MHz ON ON OFF ON

450/100 MHz ON OFF OFF ON

500/100 MHz OFF ON OFF ON

✎

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

Off

override any switch settings on the system board.

5-4 Connectors, Jumpers, and Switches

Compaq EP User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Notice

Contents iii

Symbols and Conventions

Technician Notes

Locating Additional Documentation

1.1 Model Overview

1.2 System Design

1.3 Preinstalled Software

1.4 Computer Features

1.5 Serial Number Location

SPARE P ARTS

2.1 System Unit

2.2 Mass Storage Devices

2.3 Cables

2.4 Standard and Optional Boards

2.5 Keyboards

2.6 Miscellaneous Hardware Kit

2.7 Miscellaneous Plastics Kit

2.8 Miscellaneous Parts

2.9 Shipping Boxes

2.10 Documentation and Software

3.1 Routine Care

3.2 Electrostatic Discharge Information

3.3 Service Considerations

4.1 Disassembly Sequence Chart

4.2 Disassembly Preparation

4.3 Feet Installation

4.4 Logo Plate

4.5 Cable Lock

4.6 Access Panel

4.7 Front Bezel

4.8 Power Button

4.9 Subpanel and Bezel Blanks

4.10 Power Switch

4.11 Mass Storage Devices

4.12 Removing the Drivelocks

4.13 Expansion Boards

4.14 Board Guide

4.15 System Memory

4.16 AGP Graphics Board (440BX)

4.17 Processor Components

4.18 System Board

4.19 Internal Speaker

4.20 Lithium Battery

4.21 Fan Assembly

4.22 Power Supply

4.23 Converting a Desktop to a Minitower

4.24 Converting a Minitower to a Desktop

5.1 System Board

5.1.1 Connectors, Jumpers, and Switches