Hp Compaq Deskpro EX, Deskpro EX Maintenance & Service Guide

Download

Maintenance & Service Guide

Compaq Deskpro EX Series of Personal Computers

Desktop Models

Maintenance & Service Guide

Compaq Deskpro EX Series of Personal Computers

Desktop Models

Notice

© 2000 Compaq Computer Co rp oration. Except for use in connecti on with the accompanying Compaq product, no part of this guide may be photocopied or reproduced in any form without prior written consent from Compaq Computer Corporation.

COMPAQ, the Compaq logo, and Deskpro Registered in U.S. Patent and Trademark Office are tr ademarks of Compaq Information Technologies Group, L.P.

Microsoft, Windows, Windows NT, and other names of Microsoft products referenced herein are trademarks or registered trademarks of Microsoft Corporation.

Intel and Pentium are registered trademarks of Intel Corporation. Celeron and MMX are trademarks of Intel Corporation. All other product names mentioned herein may be trademarks or registered trademarks of their respective companies. Compaq shall not be liable for technical or editorial errors or omissions contained herein. The information in this document

is subject to change without notice. THE INFORMATION IN THIS PUBLICATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND.

THE ENTIRE RISK ARISING OUT OF THE USE OF THIS INFORMATION REMAINS WITH RECIPIENT. IN NO EVENT SHALL COMPAQ BE LIABLE FOR ANY DIRECT, CONSEQUENTIAL, INCIDENTAL, SPECIAL, PUNITIVE OR OTHER DAMAGES WHATSOEVER (INCLUDING WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION OR LOSS OF BUSINESS INFORMATION), EVEN IF COMPAQ HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND WHETHER IN AN ACTION OF CONTRACT OR TORT, INCLUDING NEGLIGENCE.

The limited warranties for Compaq pro ducts are exclusively set forth in the docu mentation accompanying such products. Nothing herein shou l d be con strued as constituting a further or additional warranty.

The following words and symbols mark special messages throughout this guide:

WARNING:

to follow directions could result in bodily harm or loss of life.

CAUTION:

follow directions could result in damage to equipment or loss of information.

Text set off in this manner indicates that failure

Text set off in this manner indicates that failure to

Maintenance & Service Guide

Compaq Deskpro EX Series of Personal Computers Desktop Models

First Edition (September 2000) Part Number 201855-001 Spare Parts Number 215877-001

Compaq Computer Corporation

preface

About This Guide

Symbols and Conventions.........................................................................................................vii

Technician Notes.......................................................................................................................vii

Locating Additional Information .............................................................................................viii

chapter 1

Product Description

1.1 Product Features.............................................................................................................1-2

1.1.1 Front Panel Controls and LEDs ......................................................................... 1-2

1.1.2 Rear Panel Connectors....................................................................................... 1-3

1.1.3 Drive Positions................................................................................................... 1-4

1.2 Serial Number Location.................................................................................................. 1-5

chapter 2

Spare Parts

2.1 System Unit .................................................................................................................... 2-1

2.2 Mass Storage Devices..................................................................................................... 2-2

2.3 Cables ............................................................................................................................. 2-2

2.4 Standard, Memory, and Expansion Boards .................................................................... 2-3

2.5 Keyboards....................................................................................................................... 2-4

2.6 Miscellaneous Screw Kit................................................................................................ 2-4

2.7 Miscellaneous Parts........................................................................................................ 2-5

2.8 Shipping Boxes...............................................................................................................2-5

2.9 Documentation and Software ......................................................................................... 2-5

ONTENTS

chapter 3

Removal and Replacement Preliminaries

3.1 Electrostatic Discharge Information............................................................................... 3-1

3.1.1 Generating Static................................................................................................ 3-1

3.1.2 Preventing Electrostatic Damage to Equipment................................................. 3-2

3.1.3 Personal Grounding Methods and Equipment ................................................... 3-2

3.1.4 Grounding Workstations.................................................................................... 3-2

3.1.5 Recommended Materials and Equipment........................................................... 3-3

3.2 Routine Care................................................................................................................... 3-3

3.2.1 General Cleaning Safety Precautions................................................................. 3-3

3.2.2 Cleaning the Computer Case.............................................................................. 3-4

3.2.3 Cleaning the Keyboard....................................................................................... 3-4

3.2.4 Cleaning the Monitor ......................................................................................... 3-4

3.2.5 Cleaning the Mouse............................................................................................ 3-5

3.3 Service Considerations ................................................................................................... 3-5

3.3.1 Power Supply Fan.............................................................................................. 3-5

3.3.2 Tools and Software Requirements ..................................................................... 3-5

3.3.3 Screws................................................................................................................ 3-5

3.3.4 Cables and Connectors....................................................................................... 3-6

Contents iii

3.3.5 Hard Drives........................................................................................................ 3-6

3.3.6 Lithium Coin Cell Battery.................................................................................. 3-6

chapter 4

Removal and Replacement Procedures

4.1 Disassembly Sequence Chart.......................................................................................... 4-1

4.2 Disassembly Preparation................................................................................................. 4-2

4.3 Computer Cover ............................................................................................................. 4-3

4.4 Front Bezel ..................................................................................................................... 4-4

4.5 Bezel Blank..................................................................................................................... 4-5

4.6 Power Switch/LED Cable............................................................................................... 4-6

4.7 Mass Storage Devices..................................................................................................... 4-7

Using the Cable-Select Feature with Ultra ATA Devices........................................... 4-7

4.7.1 Removing the Internal, Side-Mounted, 3.5-Inch Hard Drive............................. 4-8

4.7.2 Removing an External 5.25-Inch Drive from Right Drive Bay....................... 4-10

4.7.3 Removing the Diskette Drive........................................................................... 4-11

4.7.4 Removing an External 5.25-Inch Drive from the Left Drive Bay.................... 4-12

4.8 System Memory............................................................................................................ 4-13

DIMMs ......................................................................................................................... 4-13

Memory Module Installation........................................................................................ 4-13

4.9 Expansion Boards......................................................................................................... 4-15

4.9.1 Expansion Slot Location.................................................................................. 4-15

4.9.2 Removing or Installing a PCI Expansion Board.............................................. 4-15

4.10 Graphics Cards..............................................................................................................4-17

4.10.1 Graphics Performance Accelerator (GPA)/AGP Inline Memory

Module (AIMM) Card with a Type I Retention Mechanism.................................... 4-17

Removing a GPA/AIMM Card................................................................................. 4-17

Installing a GPA/AIMM Card................................................................................... 4-18

4.10.2 AGP Card with a Type I Retention Mechanism............................................... 4-20

Removing an AGP Card............................................................................................ 4-20

4.10.3 GPA/AIMM Card with a Type 2 Retention Mechanism.................................. 4-21

Removing a GPA/AIMM Card................................................................................. 4-21

4.10.4 AGP Card with a Type 2 Retention Mechanism.............................................. 4-22

Removing an AGP Card............................................................................................ 4-22

4.10.5 Standard AGP Expansion Card........................................................................ 4-23

Removing an AGP Card............................................................................................ 4-23

4.11 Processor....................................................................................................................... 4-24

4.12 System Board................................................................................................................4-26

4.13 Battery .......................................................................................................................... 4-27

4.14 Power Supply................................................................................................................4-28

4.15 Chassis Fan................................................................................................................... 4-29

iv Contents

chapter 5

Connectors & Jumpers

5.1 System Board.................................................................................................................. 5-1

5.1.1 Connectors and Jumpers .................................................................................... 5-1

5.1.2 Clearing CMOS.................................................................................................. 5-2

5.1.3 Disabling or Clearing the Power-On and Setup Passwords ............................... 5-3

5.2 Hard Drive Jumper Settings............................................................................................ 5-4

5.2.1 Seagate, Quantum, and Western Digital ............................................................ 5-4

5.2.2 Maxtor................................................................................................................ 5-5

chapter 6

Specifications

6.1 Specifications.................................................................................................................. 6-1

6.1.1 System................................................................................................................ 6-1

6.1.2 System Interrupts ............................................................................................... 6-2

6.1.3 System DMA...................................................................................................... 6-2

6.1.4 ICH Fixed I/O Registers..................................................................................... 6-3

6.1.5 System Memory Map......................................................................................... 6-5

6.2 Drives.............................................................................................................................. 6-6

6.2.1 1.44-MB Diskette Drive..................................................................................... 6-6

6.2.2 Ultra ATA Hard Drives...................................................................................... 6-7

6.2.3 CD-ROM Drives................................................................................................ 6-8

6.3 Compaq Keyboards ........................................................................................................ 6-9

6.4 Mouse ............................................................................................................................. 6-9

6.5 Supported Graphics Resolutions................................................................................... 6-10

6.5.1 Intel 3D Graphics............................................................................................. 6-10

6.5.2 nVIDIA M64 Pro ............................................................................................. 6-10

6.5.3 Vanta LT.......................................................................................................... 6-10

Index

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

Contents v

preface

BOUT THIS GUIDE

This Maintenance & Service Guide is a troubleshooting and repair guide that can be used for reference when servicing the Compaq Deskpro EX Series of Personal Computers. Only authorized technicians trained by Compaq should attempt to repair this equipment.

Compaq Computer Corporation reserves the right to make changes to these models without notice.

Symbols and Conventions

The following text and symbols mark special messages throughout this guide:

WARNING: Text set off in this manner indicates that failure to follow directions in the warning could result

in bodily harm or loss of life.

CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of data.

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

✎

specific instructions.

Technician Notes

WARNING: Only authorized technicians trained by Compaq should attempt to repair this equipment. All

troubleshooting and repair procedures are detailed to allow only subassembly/module level repair. Because of the complexity of the individual boards and subassemblies, no one should attempt to make repairs at the component level or to make modifications to any printed wiring board. Improper repairs can create a safety hazard. Any indications of component replacement or printed wiring board modifications may void any warranty.

WARNING: To reduce the risk of electric shock or damage to the equipment:

• Do not disable the power grounding plug. The grounding plug is an important safety feature.

• Plug the power cord into a grounded (earthed) electrical outlet that is easily accessible at all times.

• Disconnect the power from the computer by unplugging the power cord either from the electrical

CAUTION: To properly ventilate your system, you must provide at least 3 inches (7.6 cm) of clearance at the front and back of the computer.

outlet or the computer.

Compaq Deskpro EX Series of Personal Computers vii

Locating Additional Information

The following documentation is available to support these products:

■ User Documentation

■ Technical Training Guides

■ Compaq Service Advisories and Bulletins

■ Compaq QuickFind

■ Technical Reference Guide

■ Compaq Quick Reference Guide

■ Compaq Service Reference Guide

■ Compaq Quick Troubleshooting Guide

viii About This Guide

chapter

RODUCT DESCRIPTION

This chapter describes the model offerings and features of the desktop model of the Compaq Deskpro EX Series of Personal Computers.

Compaq Deskpro EX Series of Personal Computers 1-1

1.1 Product Features

Compaq Deskpro EX Series of Personal Computers Desktop Model ships with a mouse and keyboard. Some models are also equipped with a CD-ROM drive. A Compaq color monitor or other compatible monitor does not ship with the computer.

1.1.1 Front Panel Controls and LEDs

Ref. Component/Function Ref. Component/Function

Dual-State Power Button

Power-On Light

Drive Activity Light**

Stereo Headphone Jack

Headphone Volume Control

*CD-ROM models only. **Flashes when an ATAPI device, such as the hard drive, is active.

CD-ROM Drive Busy Indicator* CD-ROM Eject Button* Diskette Drive Activity Light Diskette Eject Button

1-2 Product Description

1.1.2 Rear Panel Connectors

Ref. Component Ref. Component

Mouse Connector

Keyboard Connector

Universal Serial Bus (USB)

Connectors (2) (connects the computer to any USB peripheral while the computer is operating; is a fully functional Plug and Play connector)

Serial Connector

Parallel Port Connector

Monitor Connector Headphone/Line Out Audio Connector Serial Connector

Line-In Audio Connector Microphone Connector

Compaq Deskpro EX Series of Personal Computers 1-3

1.1.3 Drive Positions

Reference Configuration

To verify the type and size of the mass storage devices installed in the computer, run F10 Compaq Computer Setup.

Two standard 5.25-inch, half-height bays for optional drives One standard 3.5-inch, 1.44-MB diskette drive One standard 3.5-inch, side mounted hard drive

1-4 Product Description

1.2 Serial Number Location

The serial number and model information label is located on the side of the unit 1. A second label is located on the rear of the unit 2.

For the purpose of AssetControl, the serial number is embedded in CMOS and in the EEPROM on the system board and may be accessed through Diagnostics for Windows.

✎

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: A system board borrowed from another computer is recognized as a valid serial number and will create a mismatch between the serial number label and the electronic serial number.

Compaq Deskpro EX Series of Personal Computers 1-5

chapter

PARE PARTS

The chapter provides an illustrated parts breakdown and a reference for spare parts for the desktop model.

2.1 System Unit

Spare Part

Description

1 Computer cover Not spared 2 Chassis/basepan Not spared 3 Power supply 201829-001 B 4 Front bezel 213434-001 D

Compaq Deskpro EX Series of Personal Computers 2-1

Number

Warranty Tier

2.2 Mass Storage Devices

Description

1 Diskette drive, 3.5-inch, buttonless, opal 210795-001 B

2 48X Max tray load IDE CD-ROM drive 187263-001 B

3 10.0-GB Ultra ATA hard drive (66/5400) quiet 203139-001 B

* 15.0-GB Ultra ATA hard drive (66/5400) 202903-001 B

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

✎

2.3 Cables

Description

1 LED/power cable, 21” 222039-001 D

2 CD audio cable 149806-001 D

3 Dual connection cable, CD/hard drive, 18” 215392-001 D

4 Diskette drive cable, 15.5” 161735-001 D

*Not shown

Spare Part Number

Warranty Tier

Ultra ATA/100 hard drives are backwards compatible with Ultra ATA/66 devices; however, the data transfer rate is reduced to 66MB/sec.

Spare Part Number

Warranty Tier

2-2 Spare Parts

2.4 Standard, Memory, and Expansion Boards

Spare Part

Description

1 Nvidia M64 16MB SDRAM AGP Card 182757-001 B 5 AIMM (GPA) 4MB, 133MHz Graphics Card 192012-001 B

* Vanta LT 8MB SDRAM Graphics Card 201827-001 B * Mitac/Nvidia NV-15, 32MB Graphics Card 180284-001 B

Memory Module (SDIMM, 133 MHz)

2 64 MB 170080-001 B

* 128 MB 170081-001 B * 256MB 192014-001 B

Intel Pentium III Processor 3 566/66 MHz with heatsink (191832-002) and clip (223575-007) 203967-001 B 3 600/66 MHz with heatsink (191832-002) and clip (223575-007) 192011-001 B 3 667/133 MHz with heatsink (191832-002) and clip (223575-007)192007-001 B 3 700/66 MHz with heatsink (191832-002) and clip (223575-007) 203968-001 B 3 733/133 MHz with heatsink (191832-002) and clip (223575-007)192008-001 B

* 800/133 MHz with heatsink (191832-002) and clip (223575-007)192009-001 B *

866/133 MHz with fansink (191845-002). Fansink includes fan, heatsink, and clip.

* 933/133 MHz with fansink (191845-002). Fansink includes fan,

heatsink, and clip. 4 10/100 PCI Network Interface Card 188297-001 B 6 System Board 203966-001 B

*Not shown.

Number

192006-001 B

203969-001 B

Warranty Tier

Compaq Deskpro EX Series of Personal Computers 2-3

2.5 Keyboards

Description

Easy Access Keyboard-US 123130-xxx D Spacesaver, Opal 269513-xxx D Dutch -331 Finnish -351 French -051 International -B31 Norwegian -091 Spanish -071 Swedish -101 UK -031 US -001

2.6 Miscellaneous Screw Kit

Description

Miscellaneous Screw Kit, includes : 179180-001 D

6-32 x 1/4 hi-top, thread-forming screw with serrations (5 ea.) (192308-001)

6-19 x 5/16 panhead, plastite screw (4 ea.) (101346-068) 6-19 x .5/16 hi-top, taptite screw with captive washer (4 ea.)

(114399-069) 6-32 x 3/16 hi-top, thread-forming screw with serrations (5

ea.) (192308-003) M3 x 5mm, hi-top, taptite screw with serrations (4 ea.)

(247348-001) 6-32 x 3/16 buttonhead tamper-resistant, taptite screw with

serrations (3 ea.) (296769-002) 6-32 x 5/16 hi-top, taptite screw (4 ea.) (109834-568) 6-19 x 1/2 Panhead, plastite screw (5 ea.) (101346-071) Thumbscrew, molded cap (4 ea.) (179333-002)

Spare Part Number

Warranty Tier

2-4 Spare Parts

2.7 Miscellaneous Parts

Description

Mouse, scroll, opal 334689-002 D Mouse, two-button, opal 166861-001 D

2.8 Shipping Boxes

Description

Return Kit 207742-001

2.9 Documentation and Software

Description

Maintenance & Service Guide 215877-001 Illustrated Parts Map 215878-001 Service Reference Guide 152611-001 Quick Troubleshooting Guide 153837-001

Spare Part Number

Warranty Tier

Compaq Deskpro EX Series of Personal Computers 2-5

chapter

EMOVAL

& R

This chapter provides general service information for the computer. Adherence to the procedures and precautions described in this chapter is essential for proper service.

EPLACEMENT PRELIMINARIES

CAUTION: When the computer is plugged into an AC power source there is always voltage applied to the system board. You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

3.1 Electrostatic Discharge Information

A sudden discharge of static electricity from your finger or other conductor can destroy static-sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device exposed to electrostatic discharge (ESD) may not be affected at all and can work perfectly throughout a normal cycle. The device may function normally for a while, then degrade in the internal layers, reducin g its life expec tan cy.

Networks built into many integrated circuits provide some protection, but in many cases, the discharge contains enough power to alter device parameters or melt silicon junctions.

3.1.1 Generating Static

The following table shows that:

Different activities generate different amounts of static electricity.

! ! Static electricity increases as humidity decreases.

Relative Humidity

Event 55% 40% 10%

Walking across carpet 7,500 V 15,000 V 35,000 V Walking across vinyl floor 3,000 V 5,000 V 12,000 V Motions of bench worker 400 V 800 V 6,000 V

Removing DIPs* from plastic tube 400 V 700 V 2,000 V Removing DIPs* from vinyl tray 2,000 V 4,000 V 11,500 V Removing DIPs* from Styrofoam 3,500 V 5,000 V 14,500 V

Removing bubble pack from PCB 7,000 V 20,000 V 26,500 V Packing PCBs in foam-lined box 5,000 V 11,000 V 21,000 V

*Dual Inline Packaging (DIP) is the packaging around individual microcircuitry. These are then multi-packaged inside plastic tubes, trays, or Styrofoam.

✎

700 volts can degrade a product.

Compaq Deskpro EX Series of Personal Computers 3-1

3.1.2 Preventing Electrostatic Damage to Equipment

Many electronic components are sensitive to ESD. Circuitry design and structure determine the degree of sensitivity. The following proper packaging and grounding precautions are necessary to prevent damage to electric components and accessories.

! To avoid hand contact, transport products in static-safe containers such as tubes,

bags, or boxes.

! Protect all electrostatic parts and assemblies with conductive or approved

containers or packaging. Keep electrostatic sensitive parts in their containers until they arrive at static-free

stations.

! Place items on a grounded surface before removing them from their container. ! Always be properly grounded when touching a sensitive component or assembly. ! Avoid contact with pins, leads, or circuitry. ! Place reusable electrostatic-sensitive parts from assemblies in protective packaging

or conductive foam.

3.1.3 Personal Grounding Methods and Equipment

Use the following equipment to prevent static electricity damage to equipment:

Wrist straps are flexible straps with a minimum of one-megohm +/- 10%

resistance in the ground cords. To provide proper ground, a strap must be worn snug against bare skin. The ground cord must be connected and fit snugly into the banana plug connector on the grounding mat or workstation.

Heel straps/Toe straps/Boot str a ps can be used at standing workst at ions 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

3.1.4 Grounding Workstations

To prevent static damage at the workstation, use the following precautions:

! Cover the workstation with approved static-dissipative material. Provide a wrist

strap connected to the work surface and properly grounded tools and equipment.

! Use static-dissipative mats, foot straps, or air ionizers to give added protection. ! Handle electrostatic sensitive components, parts, and assemblies by the case or

PCB laminate. Handle them only at static-free workstations.

! Turn off power and input signals before inserting and removing connectors or test

equipment.

3-2 Removal & Replacement Preliminaries

! Use fixtures made of static-safe materials when fixtures must directly contact

dissipative surfaces.

! Keep work area free of nonconductive materials such as ordinary plastic assembly

aids and Styrofoam.

! Use field service tools, such as cutters, screwdrivers, and vacuums, that are

conductive.

3.1.5 Recommended Materials and Equipment

Materials and equipment that are recommended for use in preventing static electricity include:

Antistatic tape

! ! Antistatic smocks, aprons, or sleeve protectors ! Conductive bins and other assembly or soldering aids ! Conductive foam ! Conductive tabletop workstations with ground cord of one-megohm +/- 10%

resistance

! Static-dissipative table or floo r ma ts with hard ti e 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 metall ized shi eld ing bags

Transparent shielding tubes

3.2 Routine Care

3.2.1 General Cleaning Safety Precautions

1. Never use solvents or flammable solutions to clean the computer.

2. Never immerse any parts in water or cleaning solutions; apply any liquids to a clean

cloth and then use the cloth on the component.

3. Always turn off the computer when cleaning with liquids or damp cloths.

4. Always turn off the computer before cleaning the keyboard, mouse, or air vents.

5. Disconnect the keyboard before cleaning it.

6. Wear safety glasses equipped with side shields when cleaning the keyboard.

Compaq Deskpro EX Series of Personal Computers 3-3

3.2.2 Cleaning the Computer Case

Follow all safety precautions in Section 3.2.1 before cleaning the computer. To clean the computer case, follow the procedures described below:

! To remove light stains or dirt, use plain water with a clean, lint-free cloth or swab. ! For stronger stains, use a mild dishwashing liquid diluted with water. Rinse well

by wiping it with a cloth or swab dampened with clear water.

! For stubborn stains, use isopropyl (rubbing) alcohol. No rinsing is needed as the

alcohol will evaporate quickly and not leave a residue.

! After cleaning, always wipe the unit with a clean, lint-free cloth. ! Occasionally clean the air vents on the computer. Lint and other foreign matter can

block the vents and limit the airflow.

3.2.3 Cleaning the Keyboard

Follow all safety precautions in Section 3.2.1 before cleaning the keyboard. To clean the tops of the keys or the keyboard body, follow the procedures described in

Section 3.2.2. When cleaning debris from under the keys, review all rules in Section 3.2.1 before

following these procedures:

CAUTION: Use safety glasses equipped with side shields before attempting to clean debris from under the keys.

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

shaking.

! Canned, pressurized air may be used to clean debris from under the keys. Caution

should be used as too much air pressure can dislodge lubricants applied under the wide keys.

! If you remove a key, use a specially designed key puller to prevent damage to the

keys. This tool is available through many electronic supply outlets.

CAUTION: Never remove a wide leveled key (like the space bar) from the keyboard. If these keys are improperly removed or installed, the keyboard may not function properly.

! Cleaning under a key may be done with a swab moistened with isopropyl alcohol

and squeezed out. Be careful not to wipe away lubricants necessary for proper key functions. Use tweezers to remove any fibers or dirt in confined areas. Allow the parts to air dry before reassembly.

3.2.4 Cleaning the Monitor

! Wipe the monitor screen with a clean cloth moistened with water or with a

towelette designed for cleaning monitors. Do not use sprays or aerosols directly on the screen, the liquid may seep into the housing and damage a component. Never use solvents or flammable liq uid s on the monito r.

! To clean the monitor body follow the procedures in Section 3.2.2.

3-4 Removal & Replacement Preliminaries

3.2.5 Cleaning the Mouse

Before cleaning the mouse, ensure that the power to the com puter is turn ed o ff.

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

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

! To clean the mouse body, follow the procedures in 3.2.2.

3.3 Service Considerations

Listed below are some of the considerations that you should keep in mind during the disassembly and assembly of the computer.

3.3.1 Power Supply Fan

The power supply fan is a variable-speed fan based on the temperature in the power supply.

CAUTION: The cooling fan is off only when the computer is turned off or the power cable has been disconnected.

The cooling fan is always on in all other instances (when the computer is either in the “On,” “Standby,” or “Suspend” mode).

You must disconnect the power cord from the power source before opening the computer to prevent system board or component damage.

3.3.2 Tools and Software Requirements

To service the computer, you need the following:

! Torx T-15 screwdriver (Compaq screwdriver with bits PN 161946-001) ! Flat-bladed screwdriver (may sometimes be used in place of the Torx screwdriver) ! Diagnostics software ! Compaq tamper-resistant T-15 wrench (Smart Cover FailSafe Key, PN 166527-

001) or Compaq tamper-resistant bits (Smart Cover FailSafe Key, PN 166527-002)

3.3.3 Screws

The screws used in the computer are not interchangeable. They may have standard or metric threads and may be of different lengths. If an incorrect screw is used during the reassembly process, it can damage the unit. Compaq strongly recommends that all screws removed during disassembly be kept with the part that was removed, then returned to their proper locations.

✎

As each subassembly is removed from the computer, it should be placed away from the work area to prevent damage.

Compaq Deskpro EX Series of Personal Computers 3-5

3.3.4 Cables and Connectors

Most cables used throughout the unit are flat, flexible cables. These cables must be handled with care to avoid damage. Apply only the tension required to seat or unseat the cables during insertion or removal from the connector. Handle cables by the connector whenever possible. In all cases, avoid bending or twisting the cables, and ensure that the cables are routed in such a way that they cannot be caught or snagged by parts being removed or replaced.

CAUTION: When servicing this computer, ensure that cables are placed in their proper location during the reassembly process. Improper cable placement can damage the computer.

3.3.5 Hard Drives

Handle hard drives as delicate precision components, avoiding all physical shock and vibration. This applies to failed drives as well as replacement spares.

! If a drive must be mailed, place the drive in a bubble-pack mailer or other suitable

protective packaging and label the package “Fragile: Handle With Care.”

! Do not remove hard drives from the shipping package for storage. Keep hard

drives in their protective packaging until they are actually mounted in the CPU.

! Avoid dropping drives from any height onto any surface. ! If you are inserting or removing a hard drive, turn off the computer. Do not remove

a hard drive while the computer is on or in standby mode.

! Before handling a drive, ensure that you are discharged of static electricity. While

handling a drive, avoid touching the connector. For more information about preventing electrostatic damage, refer to Section 3.1, “Electrostatic Discharge.”

! Do not use excessive force when inserting a drive. ! Avoid exposing a hard drive to liquids, temperature extremes, or products that

have magnetic fields such as monitors or speak ers.

3.3.6 Lithium Coin Cell Battery

The battery that comes with the computer provides power to the real-time clock and has a minimum lifetime of about three years.

See Chapter 4, “Removal and Replacement Procedures,” for instructions on the replacement procedures.

WARNING: This computer contains a lithium battery. There is a risk of fire and chemical burn if the

battery is handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or fire, or expose it to temperatures higher than 140ºF (60ºC).

CAUTION: Batteries, battery packs, and accumulators should not be disposed of together with the general household waste.

3-6 Removal & 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 Cover

4.4 Front Bezel

4.5 Bezel Blank

4.6 Power/LED Switch

4.7.1 Removing the Internal Side-Mounted 3.5-Inch Hard Drive

4.7.2 Removing an External 5.25-Inch Drive from Right Drive Bay

4.7.3 Removing the Diskette Drive

4.7.4 Removing an External 3.5-Inch Drive from Left Drive Bay

4.8 System Memory

4.9

4.10

4.11 Processor

4.12

4.13 Lithium Battery

4.14 Power Supply

4.15 Chassis Fan

Removing an Expansion Board✱ Graphics Cards✱

System Board✱

✱ These steps are interdependent.

Compaq Deskpro EX 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.

Turn off the computer and any peripheral devices that are connected to it.

WARNING: Power is continuous to the system board and power supply even when the power switch is turned off. To prevent damage to the unit, disconnect the power cord from the power source or the unit before beginning disassembly procedures.

CAUTION: Turn off the computer before disconnecting any cables.

3. Disconnect the power cord from the electrical outlet and then from the computer.

4. Disconnect all peripheral device cab les from the com put er.

✎

During disassembly, label each cable as you remove it, noting it s posi tion and routing. Keep all screws with the components removed.

CAUTION: The screws used in the computer are of different thread sizes and lengths; using the wrong screw in an application may damage the unit.

WARNING: To reduce the risk of personal injury from hot surfaces, allow the internal system components to cool before touching.

CAUTION: Static electricity can damage the electronic components of the computer or optional equipment. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. For more information, refer to Chapter 3, “Removal and Replacement Preliminaries.”

4-2 Removal and Replacement Procedures

4.3 Computer Cover

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

Press in the button on each side of the front bezel to release the quick release cover latches 1.

3. Slide the computer cover and front bezel forward approximately 1-inch (2.5 cm); then,

lift up and off the unit 2.

To replace the computer cover, reverse the previous steps.

Compaq Deskpro EX Series of Personal Computers 4-3

4.4 Front Bezel

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

Remove the computer cover (Section 4.3) and lay it down on its top on a soft, protected surface.

3. Remove the five screws connecting the front bezel to the computer cover.

✎

4. Press the two tabs down 1 and the two side quick release buttons in 1.

5. Remove the front bezel from the computer cover 2.

✎

When removing the front bezel from the computer cover, the computer cover quick release buttons may fall out.

When replacing the front bezel, be sure to reinstall the com put er cover quick release buttons

To replace the front bezel, reverse the above procedure.

4-4 Removal and Replacement Procedures

4.5 Bezel Blank

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

Remove the computer cover (Section 4.3) and lay it down on its top on a soft, protected surface.

Push the two snaps 1 down to release from the bezel blank tabs.

4. Remove the bezel blank 2.

To install a bezel blank, reverse the removal procedure.

Compaq Deskpro EX Series of Personal Computers 4-5

4.6 Power Switch/LED Cable

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

Remove the computer cover (Section 4.3).

3. Disconnect the flat ribbon cable and the CD audio cable from the CD-ROM drive.

4. Disconnect the power/LED cable from the system board 1.

5. Pinch the two tabs of the power switch assembly together 2 and pull the assembly 3

from the chassis.

6. Pinch the two tabs of the Drive Activity Light assembly together 2 and pull the

assembly 4 from the chassis.

7. Pinch the two tabs of the Power-on Light assembly together 2 and pull the assembly 5

from the chassis.

To install a power switch/LED cable, reverse the above procedure.

4-6 Removal and Replacement Procedures

4.7 Mass Storage Devices

The Compaq Deskpro EX Series of Personal Computers desktop model supports up to four drives in various configurations.

Reference Configuration

Two standard 5.25-inch, half-height bays for optional drives One standard 3.5-inch, 1.44-MB diskette drive One standard 3.5-inch, side-mounted hard drive

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

When installing additional drives, fo llow the se guide line s :

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.

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 EX Series of Personal Computers 4-7

4.7.1 Removing the Internal, Side-Mounted, 3.5-Inch Hard Drive

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

2. Remove the computer cover (Section 4.3).

3. Disconnect the power and data cables from the back of the hard drive.

4. Remove the two screws at the top of the hard drive adapter that connect the adapter to

the chassis 1.

Slide the adapter toward the right until the two slots on the bottom of the adapter clear the tabs 2.

Tilt and lift the hard drive adapter out of the chassis 3.

✎

The bottom of the adapter must be tilted inward to remove it from the chassis.

4-8 Removal and Replacement Procedures

7. Remove the drive from the drive adapter by first removing the four screws that connect

the drive to the adapter, and then sliding the drive out of the adapter.

To install a side-mounted hard drive, reverse 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.

When installing the drive adapter into the comput er, the slo ts in the bot tom of the adapter must be lined up with the tabs in the chassis.

CAUTION: When servicing the computer, ensure that cables are placed in their proper locations during the reassembly process. Improper cable placement can damage the computer.

CAUTION: Use only 3/16-inch or 5-mm long screws as guide screws. Longer screws can damage the internal components of the drive.

Compaq Deskpro EX Series of Personal Computers 4-9

4.7.2 Removing an External 5.25-Inch Drive from Right Drive Bay

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

2. Remove the computer cover (Section 4.3).

3. Disconnect the drive power cable, signal cable, and audio connector, if applicable.

Remove the screw from the right side of the drive 1.

5. Pull the drive out of the bay 2.

To install a 5.25-inch drive into the right drive bay, reverse the above procedure.

✎ ✎

It may be necessary to remove a bezel blank (Section 4.5). When replacing the drive, use the existing screws. Metric screws (M3) have a

black finish while U.S. screws (#6-32) have a silver finish.

CAUTION: When servicing the computer, ensure that cables are placed in their proper locations during the reassembly process. Improper cable placement can damage the computer.

CAUTION: Use only 3/16-inch or 5-mm long screws as guide screws. Longer screws can damage the internal components of the drive.

4-10 Removal and Replacement Procedures

4.7.3 Removing the Diskette Drive

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

2. Remove the computer cover (Section 4.3).

3. Remove the side-mounted hard drive (Section 4.7.1).

4. Disconnect the data cable and the drive power cable.

5. Facing the drive, remove the retaining screw on the right side of the drive that secures

the drive in the bay 1.

6. While pushing the release latch on the bottom of the bay down 2, pu ll the disk et te driv e

out of the bay 3.

To install a diskette drive, reverse the above procedure.

✎ ✎

When installing a new diskette drive, be sure to exchange the guide screws from the old drive.

When replacing the drive, use the existing screws. Metric screws (M3) have a black finish while U.S. screws (#6-32) have a silver finish.

CAUTION: When servicing the computer, ensure that cables are placed in their proper locations during the reassembly process. Improper cable placement can damage the computer.

CAUTION: Use only 3/16-inch or 5-mm long screws as guide screws. Longer screws can damage the internal components of the drive.

Compaq Deskpro EX Series of Personal Computers 4-11

4.7.4 Removing an External 5.25-Inch Drive from the Left Drive Bay

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

2. Remove the computer cover (Section 4.3).

3. Disconnect the drive power cable, signal cable, and audio connector, if applicable.

4. Facing the drive, remove the retaining screws on the left side of the drive that secure the

drive in the bay 1.

5. Pull the drive out of the bay 2.

To install a 5.25-inch drive into the left drive bay, reverse the above procedure.

✎ ✎

4-12 Removal and Replacement Procedures

It may be necessary to remove a bezel blank from the front bezel (Section 4.5).

When replacing the drive, use the existing screws. Metric screws (M3) have a black finish while U.S. screws (#6-32) have a silver finish.

CAUTION: When servicing the computer, ensure that cables are placed in their proper locations during the reassembly process. Improper cable placement can damage the computer.

CAUTION: Use only 3/16-inch or 5-mm long screws as guide screws. Longer screws can damage the internal components of the drive.

4.8 System Memory

The computer comes with synchronous dynamic random access memory (SDRAM) dual inline memory modules (DIMMs). The Intel 815 chipset comes with at least 64 MB of SDRAM DIMMS, upgradeable to 512 MB.

DIMMs

The memory sockets on the Intel 815 chipset–based system board can be populated with industry-standard DIMMs. These memory module slots are populated with at least one preinstalled memory module. To achieve the ma xi mu m mem ory suppo rt, you may be required to replace the preinstalled DIMM with a higher capacity DIMM.

For proper system operation, the DIMMs must be industry-standard 168-pin, unbuffered PC100– or PC133– compliant SDRAM DIMMs, depending on the model. The SDRAM DIMMs must support CAS Latency 2 or 3 (CL = 2 or CL = 3). They must also contain the mandatory Joint Electronic Device Engineering Council (JEDEC) Serial Presence Detect (SPD) information. DIMMs constructed with x4 SDRAM (16 ICs per side) are not supported; the system will not start using unsupported DIMMs.

The Intel 815 chipset supports both PC100 and PC133 SDRAM DIMMs. PC133 DIMMs should be used for optimal performance. If both PC100 and PC133 SDRAM DIMMs are installed in a computer, the system memory will run at the lower 100Mhz speed. Some configurations of PC133 SDRAMs may run at 100Mhz, instead of 133Mhz.

Memory Module Installation

CAUTION:

it is important to use memory modules with gold metal contacts to prevent corrosion and/or oxidation resulting from having incompatible metals in contact with each other.

CAUTION:

cards. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. Refer to Appendix F, “Electrostatic Discharge,” for more information.

CAUTION:

may damage the module.

Your memory module sockets have gold metal contacts. When upgrading your memory,

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 so

Compaq Deskpro EX Series of Personal Computers 4-13

To install a memory module, complete the fol low ing step s:

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

2. Remove the computer cover (Section 4.3).

3. Open both latches of the memory socket 1, and insert the memory module into the

socket 2.

4. A memory module can be installed in only one way. Match the notch on the module

with the tab on the memory socket. Push the module down into the socket, ensuring the module is securely seated. Close both latches 3.

5. Repeat steps 3 and 4 for any additional modules 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.

4-14 Removal and Replacement Procedures

4.9 Expansion Boards

4.9.1 Expansion Slot Location

PCI expansion slots

AGP graphics slot

4.9.2 Removing or Installing a PCI Expansion Board

Prepare the computer for disassembly (Section 4.2).

Remove the computer cover (Section 4.3).

If installing an expansion card, skip to step 8.

To remove an expansion card, disconnect any cables attached to the expansion card.

Remove the screw at the top of the expansion slot.

Hold the card at each end and carefully rock it back and forth until the connectors pull free from the slot. Be sure not to scrape the card against other components.

Store the card in anti-static packaging.

Install an expansion slot cover or new expansion card to close the open slot.

If not installing a new expansion card, skip to step 10.

To install a new expansion card in an open slot, remove the expansion slot cover.

9. Slide the expansion card into the expansion slot and press it firmly into place.

Compaq Deskpro EX Series of Personal Computers 4-15

✎

When you install an expansion card, make sure you press firmly on the card so

that the entire connector seats properly in the expansion card slot.

10. Replace the screw at the top of the expansion slot.

11. Replace the computer cover.

12. Connect external cab les to the ins talled ca rd, if needed.

13. Reconfigure the computer, if necessary.

4-16 Removal and Replacement Procedures

4.10 Graphics Cards

The AGP expansion slot may come with a retention mechanism installed around it to hold graphics cards securely in place. There are two different types of retention mechanisms that may be installed around the AGP expansion slot.

4.10.1 Graphics Performance Accelerator (GPA)/AGP Inline Memory Module (AIMM) Card with a Type I Retention Mechanism

Removing a GPA/AIMM Card

Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.3).

3. Pull the arm on the right side of the retention mecha nism 1.

4. At the same time, rotate the front of the GPA/AIMM card up until it is at a 45 degree

angle 2.

Remove the card from the expansion slot 3.

Compaq Deskpro EX Series of Personal Computers 4-17

Installing a GPA/AIMM Card

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

switch is turned off. To prevent damage to the unit, disconnect the power cord from the power source or the unit before beginning disassembly procedures.

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

2. Remove the computer cover (Section 4.3).

Insert the hook 1 on the left side of the GPA/AIMM card under the loop 2 on the left side of the retention mechanism.

Rotate the right side of the card down until it is at a 45 degree angle 3.

4-18 Removal and Replacement Procedures

5. With the GPA/AIMM card at a 45 degree angle, slide the card toward the back of the

expansion slot 4 until the fingers on the bottom of the card line up properly with the connectors in the expansion slot.

CAUTION:

expansion slot during installation. Misalignment may result in damage to the card or the AGP connector.

While pulling the arm on the right side of the retentio n mecha nis m 5, rota te the card

The fingers on the bottom of the GPA/AIMM card must be properly aligned with the

down into the expansion slot until seated 6.

Compaq Deskpro EX Series of Personal Computers 4-19

4.10.2 AGP Card with a Type I Retention Mechanism

Removing an AGP Card

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

Remove the computer cover (Section 4.3).

Remove the screw at the top of the expansion slot.

4. Pull the arm on the right side of the retention mecha nism .

5. Pull the card straight up to remove it from the expansion slot.

✎

AGP card may differ from illustration.

To install the graphics card, reverse the above procedures.

4-20 Removal and Replacement Procedures

4.10.3 GPA/AIMM Card with a Type 2 Retention Mechanism

Removing a GPA/AIMM Card

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

Remove the computer cover (Section 4.3).

Pull the arm on the right side of the retention mecha nism .

4. Pull the card straight up to remove it from the expansion slot.

To install the graphics card, reverse the above procedures.

Compaq Deskpro EX Series of Personal Computers 4-21

4.10.4 AGP Card with a Type 2 Retention Mechanism

Removing an AGP Card

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

Remove the computer cover (Section 4.3).

Remove the screw at the top of the expansion slot.

4. Pull the arm on the right side of the retention mecha nism .

5. Pull the card straight up to remove it from the expansion slot.

✎

To install the graphics card, reverse the above procedures.

AGP card may differ from illustration.

4-22 Removal and Replacement Procedures

4.10.5 Standard AGP Expansion Card

Removing an AGP Card

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

Remove the computer cover (Section 4.3).

Remove the screw at the top of the expansion slot.

4. Remove the AGP graphics board as you would any PCI expansion board

(Section 4.9.2).

✎

AGP card may differ from illustration.

Compaq Deskpro EX Series of Personal Computers 4-23

4.11 Processor

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

Remove the computer cover (Section 4.3).

3. If there is a fansink on the processor, unplug the fan cable from the system board.

4. Remove the heatsink retaining clip 1 by pressing down on the clip’s extended tab until

it releases from the safety catch.

Lift the heatsink 2 off the processor.

6. Release the processor 3 from the socket by pulling the handle on the ZIF socket out

and upward 4.

7. Lift the processor out of the socket.

WARNING: Removing the heatsink from the processor destroys the integrity of the thermal interface pad between the two. Whenever the heatsink is removed, the thermal interface pad must to be removed and a new one installed in its place.

4-24 Removal and Replacement Procedures

Before installing a fansink, prepare for its installation by doing one of the following:

• New heatsink: if the heatsink ha s a therma l int erface at tac hed to its bot tom , peel off the

protective paper before installing the heatsink, if necessary.

• Reinstalled heatsink: Note where the thermal interface is located on the heatsink. Carefully

remove the thermal interface pad and all re sidu e fro m the heats ink surfac e. If any ther mal interface remains on the die of the processor, scrape it off with your fingernail. A Q-Tip dipped in alcohol can be used to clean both surfaces. Add thermal interface pad to the bottom of the heatsink before reinstalling the original heatsink to insure an efficient thermal interface.

CAUTION: Thermal interface heat transmission is reduced if residue remains on the heatsink or processor, or the heatsink thermal interface surface is scratched. This could lead to the processor running at a higher than normal temperature, fan turning at a higher than normal speed, and possible loss of data if processor shuts down from overheating.

✎ ✎

✎

Ensure that the pins on the processor are properly aligned before inserting the processor in the ZIF socket. Two corners of the processor will not have an outermost pin.

All units with 866 MHz and faster processors require an active fansink. When installing the fan, make sure it is positioned so it blows down on the processor.

All units with 866 MHz and faster processors require use of a chassis fan (Section 4.15).

Compaq Deskpro EX Series of Personal Computers 4-25

4.12 System Board

✎

Prepare the computer for disassembly (Section 4.2).

2. Remove the computer cover (Section 4.3).

Remove all expansion boards (Section 4.9).

Disconnect any cables that are attached to the system board, noting their location for reinstallation.

5. Remove the DIMMs (optional) (Section 4.8).

Remove the graphics card (Section 4.10).

7. Remove the six retaining screws that secure the system board to the chassis.

8. Slide the board about ½ inch toward the front of the chassis to disengage the I/O panel,

then lift it up and out of the chassis.

More information on the system board, including troubleshooting criteria, can be found in the Compaq Quick Troubleshooting Guide (part number 153837-001) and the Compaq Service Reference Guide (part number 152611-001).

To install a new system board, reverse the above procedures.

4-26 Removal and Replacement Procedures

4.13 Battery

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

Remove the computer cover (Section 4.3).

3. Locate the battery on the system board.

4. Lift the battery out of the holder.

Slide the replacement battery into position with the positive side up. The battery holder automatically secures the battery in the proper position.

6. Reassemble the computer.

7. Reconnect the AC power cord and turn on the computer.

8. Reset the date and time, your passwords, and any special system setups, using Compaq

Computer Setup.

WARNING: This computer contains a lithium battery. There is a risk of fire and chemical burn if the battery pack is handled improperly. Do not disassemble, crush, puncture, short external contacts, dispose in water or fire, or expose it to temperatures higher than 60ºC (140ºF).

In North America, dispose of nickel metal hydride or lithium batteries by taking advantage of the Compaq battery recycling program. You will be provided with a postage-paid battery pack mailer preaddressed to a reclamation facility where the metals are recycled. Call the telephone number listed for your location in the Contacting Customer Support guide for more information.

In Europe, do not dispose of batteries with general household waste. Dispose of or recycle them by using the public collection system or returning them to Compaq, your authorized Compaq partners, or their agents.

Compaq Deskpro EX Series of Personal Computers 4-27

4.14 Power Supply

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

Remove the computer cover (Section 4.3).

3. Disconnect all power cables from the mass storage devices and the system board.

✎

4. Place the computer on its side on a protected surface.

5. Remove the screw that connects the power supply to the bottom of the unit 1.

6. Remove the three screws that secure the power supply to the back of the chassis 2.

7. Slide the power supply toward the front of the computer, then remove it from the

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

chassis 3.

To replace the power supply, reverse the above procedure.

4-28 Removal and Replacement Procedures

4.15 Chassis Fan

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

2. Remove the computer cover (Section 4.3).

Disconnect the fan power cable from the system board 1.

4. Remove the four screws that connect the fan to the back of the chassis 2.

5. Lift the fan out of the chassis 3.

✎

To replace the chassis fan, reverse the above procedure.

Make sure the fan is installed so that it blows air out of the computer.

Compaq Deskpro EX Series of Personal Computers 4-29

chapter

ONNECTORS AND JUMPERS

This chapter provides connector and jumper information for the system board and hard drives for the desktop model.

5.1 System Board

5.1.1 Connectors and Jumpers

CR28 3.3V Aux LED P12 SOS Connector CR29 3.3V Main LED (NI) P20 Primary IDE Connector

E6 Firmware Hub Top Block Lock (Installed=Bootblock

unprotected, Removed=Bootblock protected) E29 SCSI LED Cable Connector P70 CPU Fan Connector E49

Clear Password Header (Installed = Enabled,

Removed = Cleared)

J20-22 PCI Slots P701 CD-ROM Audio

J40 AGP/AIMM Connector P216 Chassis Fan Connector

P1 Power Supply Connector SW50 Clear CMOS

P5 Power Button, Front Panel LED Cable Connector XBT1 CMOS Battery P10 Diskette Drive Connector XMM1-2 DIMM Memory Slots P11 Aux Audio Connector XU1 Primary Processor Socket

Compaq Deskpro EX Series of Personal Computers 5-1

P21 Secondary IDE Connector

P100 ITP Connector (NI)

5.1.2 Clearing CMOS

The computer's configuration (CMOS) may occasionally be corrupted. If it does, it is necessary to clear the CMOS memory using push button switch SW50.

To clear and reset the configuration, perform the following procedure:

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

CAUTION: The power cord must be disconnected from the power source before pushing the Clear CMOS Button (NOTE: All LEDs on the board should be OFF). Failure to do so may damage the system board.

2. Remove the computer cover (Section 4.3).

Press the CMOS button located on the system board and keep it depressed for 5 seconds.

4. Replace the computer cover.

5. Turn the computer on.

6. Run F10 Computer Setup to reconfigure the system.

5-2 Connectors and Jumpers

5.1.3 Disabling or Clearing the Power-On and Setup Passwords

1. Turn off the computer and any external devices, and disconnect the power cord from

the power outlet.

2. Disconnect the keyboard, monitor, and any other external devices connected to the

computer.

Remove the computer cover.

4. Locate the header and jumper labeled E49.

5. Remove the jumper from pins 1 and 2. Place the jumper over pin 2 only, in order to

avoid losing it.

6. Replace the computer cover.

7. Reconnect the external equipment.

Plug in the computer and turn on power. Allow the operating system to start. This clears the current passwords and disables the password features.

9. To re-enable the password features, repeat steps 1-4, then rep lace th e jump er on pins 1

and 2.

10. Repeat steps 6-8, then establish new passwords.

Refer to the Computer Setup (F10 Setup) instructions to establish new passwords.

Compaq Deskpro EX Series of Personal Computers 5-3

5.2 Hard Drive Jumper Settings

5.2.1 Seagate, Quantum, and Western Digital

The drawings and tables below apply to a number of different size drives in the following paragraphs.

Seagate, Quantum, and Western Digital

Ultra ATA Hard Drive Jumper Settings

Definition Seagate Quantum Western Digital

Single 7 - 8 1 - 2 and 3 - 5 3 - 5 Primary 5 - 6 and 7 - 8 1 - 2 and 3 - 5 5 - 6 Secondary No connection 3 - 5 3 - 4 Cable Select 5 - 6 2 - 4 and 3 - 5 1 - 2

5-4 Connectors and Jumpers

5.2.2 Maxtor

Maxtor Ultra ATA Hard Drive Jumper Settings

Definition J50 J48 J46 J44 J42

Single J Primary (in a dual-drive system) J Secondary O

Cable Select

4092 Cylinder Limitation

Disabled* Enabled

O J

J Factory Reserved O Factory Reserved O * = Default setting

J = Jumper O = No jumper

Compaq Deskpro EX Series of Personal Computers 5-5

chapter

PECIFICATIONS

6.1 Specifications

6.1.1 System

Dimensions

Height Width Depth

5.1 in

14.5 in

15.70 in

12.95 cm

36.83 cm

39.88 cm

Weight (approximate, depending on configuration) Weight Supported

Power Supply, 120 Watt

Operating Voltage Range Rated Voltage Range Rated Line Frequency Rated Input Current (maximum) Maximum Rated Power

Environmental Requirements: Temperature

Operating Nonoperating

Humidity (noncondensing)

Operating Nonoperating

Maximum Altitude (unpressurized)

Operating Nonoperating

13.2 lb 6.35 kg 92 lb 41.7 kg

90-132 VAC 100-127 VAC 47-63 Hz 5A 120W

50 to 95°F

-4° to 158°F 20% to 90%

5% to 95% 10,000 ft

30,000 ft

180-264 VAC 200-240 VAC 47-63 Hz

2.5A 120W

10 to 35°C

-20° to 70°C 20% to 90%

5% to 95% 3048 m

9144 m

Compaq Deskpro EX Series of Personal Computers 6-1

6.1.2 System Interrupts

Hardware IRQ System Function

0 Timer Interrupt 1 Keyboard 2 Interrupt Controller Cascade 3 Serial Port (COM B) 4 Serial Port (COM A) 5 Audio 6 Diskette Drive 7 Parallel Port (LPT 1) 8 Real-Time Clock 9 Available for PCI 10 Available for PCI 11 Available for PCI 12 Mouse 13 Coprocessor 14 Primary IDE Controller 15 Secondary IDE Controller

6.1.3 System DMA

Hardware DMA System Function

0 Unused 1 Unused 2 Diskette Drive 3 ECP Parallel Port LPT1 (Default; Alternate = DMA 0) 4 DMA Controller Cascading 5 Unused 6 Unused 7 Unused

6-2 Specifications

6.1.4 ICH Fixed I/O Registers

Port Register Name

00h, 02h, 04h, 06h Channel 0, 1, 2, 3 DMA Base & Current Address Regsiter C0h, C4h, C8h, CCh Channel 4, 5, 6, 7 DMA Base & Current Address Register 01h, 03h, 05h, 07h Channel 0, 1, 2, 3 DMA Base & Current Count Register C2h, C6h, Cah, CEh Channel 4, 5, 6, 7 DMA Base & Current Count Register 10h-1Fh 20h Master PIC ICW1 Init. Cmd Word 1 Register

21h Master PIC ICW2 Init. Cmd Word 1 Register

24h-25h, 28-29h, 2Ch-2Dh, 30h-31h, 34h-35h, 38h-39h, 3Ch-3Dh

40h Counter 0 Interval Time Status Byte Format

41h Counter 1 Interval Time Status Byte Format

42h Counter 2 Interval Time Status Byte Format

43h Timer Control Word Register

50h-53h 61h NMI Status and Control Register 70h NMI Enable Register

71h Real-Time Clock (Standard RAM) Target Register 72h Extended RAM Index Register 73h Extended RAM Target Register 74h-75h 76h-77h 81h, 82h, 83h Channel 2, 3, 1 DMA Memory Low Page Register 84h-86h, 88h Reserved Page Registers 89h, 8Ah, 8Bh Channel 6, 7, 5 DMA Memory Low Page Register 8CH-8Eh Reserved Page Registers 8Fh Refresh Low Page Register 91h-9Fh

(except 92h) 92h Fast A20 and INIT Register CF9h Reset Control Register

Aliased at 00h-0Fh

Master PIC OCW2 Op Ctrl Word 2 Register Master PIC OCW3 Op Ctrl Word 3 Register

Master PIC ICW3 Init. Cmd Word 1 Register Master PIC ICW4 Init. Cmd Word 1 Register Master PIC OCW1 Op Ctrl Word 3 Register

Aliased at 20h-21h

Counter 0 Counter Access Port Register

Counter 1 Counter Access Port Register

Counter 2 Counter Access Port Register

Timer Control Word Register Read Back Counter Latch Command

Aliased at 40h-43h

Real-Time Clock (Standard RAM) Index Register

Aliased at 70h-71h Aliased at 72h-73h or 70h-71h

Aliased at 81h-8Fh

continued

Compaq Deskpro EX Series of Personal Computers 6-3

ICH Fixed I/O Registers cont

Port Register Name

A0h Slave PIC ICW1 Init. Cmd Word 1 Register

Slave PIC OCW2 Op Ctrl Word 2 Register Slave PIC OCW3 Op Ctrl Word 3 Register

A1 Slave PIC ICW2 Init. Cmd Word 2 Register

Slave PIC ICW3 Init. Cmd Word 3 Register Slave PIC ICW4 Init. Cmd Word 4 Register Slave PIC OCW1 Op Ctrl Word 1 Register

A4h-A5h, A8h-A8h, ACh-ADh, B0h-B1h, B4h-B5h, B8h-B9h, BCh-BDh

B2h Advanced Power Management Control Port Register B3h Advanced Power Management Status Port Register C0h, C4h, C8h, CCh Channel 4, 5, 6, 7 DMA Base and Current Address Register C1h C5h C9h CDh C2h, C6h, CAh, CEh Channel 4, 5, 6, 7 DMA Base and Current Count Register C3h C7h CBh CFh D0h Channel 4-7 DMA Command Register

D1h D4h Channel 4-7 DMA Write Single Mask Register D5h D6h Channel 4-7 DMA Channel Mode Register D7h D8h Channel 4-7 DMA Clear Byte Pointer Register D9h DAh Channel 4-7 DMA Master Clear Register DBh DCh Channel 4-7 DMA Clear Mask Register DEh DEh Channel 4-7 DMA Write All Mask Register DFh F0h Coprocessor Error Register 170h-177h PIO Mode Command Block Offset for Secondary Drive 1F0h-1F7h PIO Mode Command Block Offset for Primary Drive 376h PIO Mode Control Block Offset for Secondary Drive

Aliased at A0h-A1h

Aliased at C0h Aliased at C4h Aliased at C8h Aliased at CCh

Aliased at C2h Aliased at C6h Aliased at CAh Aliased at Ceh

Channel 4-7 DMA Status Register

Aliased at D0h

Aliased at D4h

Aliased at D6h

Aliased at D8h

Aliased at DAh

Aliased at DCh

Aliased at DEh

continued

6-4 Specifications

ICH Fixed I/O Registers cont

Port Register Name

3F6h PIO Mode Control Block Offset for Primary Drive 4D0h Master PIC Edge/Level Triggered Register 3F6h PIO Mode Control Block Offset for Primary Drive 4D0h Master PIC Edge/Level Triggered Register 4D1h Slave PIC Edge/Level Triggered Register 400-47F Super I/O F800-F87F Reserved (power management) FA00-FA3F Reserved (GPIO management) FC00-FC0F Reserved (SMBUS controller) NOTE: When the POS_DEC_EN bit is set, additional I/O ports get positively decoded by the ICH.

6.1.5 System Memory Map

Size Memory Address System Function

512 KB FFFFFFFFh to FFF80000 System ROM 3839 MB FFFBFFFFh to 10000000h PCI Memory Expansion 511 MB 0FFFFFFFh to 00100000h HOST or PCI Memory Expansion 128KB 000FFFFFh to 000E0000h System ROM 96 KB 000DFFFFh to 000C8000h PCI Option ROMs 32 KB 000C7FFFh to 000C0000h Video ROM 128 KB 000BFFFFh to 000A0000h Video RAM 640 KB 0009FFFFh to 00000000h Base Memory

Compaq Deskpro EX Series of Personal Computers 6-5

6.2 Drives

6.2.1 1.44-MB Diskette Drive

Size and Capacity

Size (in) High Density (MB) Low Density (KB)

3.5

1.44 720

Compaq Spare Part Number Light Height (inches)

Bytes per Sector Sectors per Track

High Density Low Density

Tracks per Side

High Density Low Density

Read/Write Heads Average Seek Time (m/s)

Track-to-Track (high/low) Average (high/low) Latency Average (ms)

191714-001 Green 1

512

18 9

80 80

3/6 94/173 100

6-6 Specifications

6.2.2 Ultra ATA Hard Drives

Formatted Capacity

Physical (MB) Logical (MB)

10.0 GB 15.0 GB

10242 10242

15364 15364

Compaq Spare Part Number Logical Block Allocation

Total Sectors User Addressable Sectors

Sectors per Track

Physical Logical

Data Heads/Cylinder

Physical Logical

Data Bytes/Sector Sector Interleave ECC Bytes Encoding Method Spin-Up Time (maximum) Spin-Down Time (maximum) Seek Times, Logical

(Busy to Seek Complete)

Track-to-Track Average (Read) Full Stroke

203139-001 202903-001

16514064 19541088

648-396 63

2 16

512 512 1:1 1:1 24 24 24/26 EPRML 24/26 EPRML 15 seconds 15 seconds 15 seconds 15 seconds

MAX TYP

4.75ms 2.1ms

11.5ms 10.9ms

27.0ms 25.0ms

16514064 29336832

648-396 63

3 16

MAX TYP

4.75ms 2.1ms

11.5ms 10.9ms

27.0ms 25.0ms

Average Latency Data Transfer Rate

@Disk to Buffer @Interface w/o IORDY DMA UDMA

RPM

5.56ms 5.56ms

308 Mbits/s (max.)

16.6 MB/s

66.6 MB/s 5400+/-0.2% 5400+/-0.2%

308 Mbits/s (max.)

16.6 MB/s

66.6 MB/s

Compaq Deskpro EX Series of Personal Computers 6-7

6.2.3 CD-ROM Drives

Compaq Spare Part Number

48X Max

187263-001

Data Buffer (ms) Data Transfer Rate

Access Time (ms)

Random Full-Stroke Seek

Cache Buffer Interface Disk Formats Read

Disk

Capacity Block Size

Diameter Thickness Track Pitch

16.6 150 KB/s Min (audio)

CD: 3000-7200 KB/s

<100 <150

128 KB ATAPI Photo-CD/Multisession

CD-ROM Multi Read CD TEXT Audio CD CD-I CD-RW CD-R CD EXTRA CD-ROM XA

CD: 650 MB Mode 1 – 2048 bytes

Mode 2 – 2340, 2336 bytes CD-DA – 2353 bytes CD-XA – 2328 bytes

12 cm;8 cm

1.2 mm

1.6 um

Audio Output Level

Startup Time

Operating Conditions

Dimensions (mm) (HxWxD)

Weight (grams) MPEG Playback Graphics

Solution Support

6-8 Specifications

Line Out Headphone

Temperature Humidity

0.7 V @ 47 K ohm

0.6 V @ 32 ohm <7 sec (typical); <30 sec with

multisession

5 – 45 C 10-80% relative humidity

42.9x150.1x208 1200 None

6.3 Compaq Keyboards

Compaq Easy Access Spacesaver

Dimensions

Height Width Depth

1.4 in

18.3 in

6.3 in

6.4 Mouse

Dimensions

Height Length Width

1.34 in

4.45 in

2.36 in

1.31 in

18.39 in

6.4 in

Scroll Mouse 2-Button Mouse

334689-002 166861-001

3.4 cm

11.3 cm

6.0 cm

1.34 in

4.45 in

2.36 in

3.4 cm

11.3 cm

6.0 cm

Weight Base Resolution Tracking Speed

(maximum)

Temperature

Operating Non-operating

Lifetime

Mechanical Switch

Relative Humidity

Operating Non-operating

4.59 oz 130 g 4.59 oz 130 g 400 dpi 15.8 dp 400 dpi 400 dpi 10 in/sec 25 cm/sec 10 in/sec 25 cm/sec

50°F to 104°F

-22°F to 140°F

300 miles 1 million operations

10% to 90% 20% to 80%

10°C to 50°C

-30°C to 60°C

483 km 1 million operations

10% to 90% 20% to 80%

32°F to 104°F

-4°F to 140°F

300 miles 1 million operations

10% to 90% 10% to 90%

0°C to 40°C

-20°C to 60°C

483 km 1 million operations

10% to 90% 10% to 90%

Compaq Deskpro EX Series of Personal Computers 6-9

6.5 Supported Graphics Resolutions

6.5.1 Intel 3D Graphics

Colors 256 65K 16.7M

640 x 480 800 x 600 1024 x 768 1152 x 864 1280 x 1024 1600 x 1200

6.5.2 nVIDIA M64 Pro

Mode

640 x 480 800 x 600 1024 x 768 1152 x 864 1280 x 1024 1600 x 1200 1600 x 1200 1920 x 1080 1920 x 1080 1920 x 1200

85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz 85 Hz

Color Depth (bits/pixel) Refresh Rate (Hz)

8/16/32 60,72,75,85 8/16/32 60,72,75,85 8/16/32 60,70,75,85 8/16/32 60,70,72,75,85 8/16/32 60,70,72,75,85 8/16 60,70,72,75,85 32 60 8/16 60,70,72,75,85 32 60 8/16 60,70,72,75,85

6.5.3 Vanta LT

Mode

640 x 480 800 x 600 1024 x 768 1152 x 864 1280 x 1024 1600 x 1200 1600 x 1200 1920 x 1080 1920 x 1080 1920 x 1200 1920 x 1200

6-10 Specifications

Color Depth (bits/pixel) Refresh Rate (Hz)

8/16/32 60,72,75,85 8/16/32 60,72,75,85 8/16/32 60,70,75,85 8/16/32 60,70,72,75,85 8/16/32 60,70,72,75,85 8/16 60,70,72,75,85 32 60 8/16 60,70,72,75,85 32 60 8/16 60,70,72,75 32 60

AGP card

spare part number, 2-3 AGP retention mechanism, 4-17 AIMM card

spare part number, 2-3

battery

proper disposal, 4-27

removal and replacement,

4-27

bezel blank

removal and replacement,

4-5

cable kit

spare part number, 2-2 cable select feature, 4-7 CD-ROM drive

spare part number, 2-2

specifications, 6-8 chassis fan

removal and replacement,

4-29

cleaning

computer, 3-4

keyboards, 3-4

monitor, 3-4

mouse, 3-5 clearing

CMOS, 5-2

passwords, 5-3 CMOS

clearing configuration, 5-2 computer

cleaning, 3-4 computer cover

removal and replacement,

4-3

Index

computer features

drive positions, 1-4 front panel controls, 1-2

rear panel connectors, 1-3 configurations, drives, 4-7 connectors and jumpers, 5-1

DIMM

spare part number, 2-3 DIMMs, 4-13 disassembly chart, 4-1 disassembly preparation, 4-2 diskette drive

removal and replacement,

4-11 spare part number, 2-2 specifications, 6-6

DMA settings and specifications,

6-2

documentation

spare part number, 2-5

drive configur ations, 4-7 drive positions, 1-4

electrostatic discharge (ESD), 3-1 ESD. See electrostatic discharge expansion boards

removal and replacement,

4-15

external 5.25-inch drive

removal and replacement,

4-10, 4-12

front bezel

removal and replacement,

4-4 spare part number, 2-1

front panel controls and LEDs,

1-2

graphics cards

removal and replacement,

4-17 spare part number, 2-3 specifications, 6-10

grounding methods, 3-2

hard drive

jumpers, 5-4 proper handling, 3-6 removal and replacement,

4-8 spare part number, 2-2 specifications, 6-7

I/O addresses, 6-3 INSPECT utility, 1-4, 4-7 IRQ settings, 6-2

jumpers

hard drive, 5-4

keyboards

cleaning, 3-4 spare part number, 2-4 specifications, 6-9

line-out audio connector, 1-3

Index I-1

memory

removal and replacement,

4-13 spare part number, 2-3 standard, 2-3

memor y map, 6-5 microprocessor

spare part number, 2-3

miscellaneous screw kit

spare part number, 2-4

monitor

cleaning, 3-4

mouse

cleaning, 3-5 spare part number, 2-5 specifications, 6-9

Network Interface Card

spare part number, 2-3

Nvidia graphics card

spare part number, 2-3

power supply

fan, 3-5 removal and replacement,

4-28 spare part number, 2-1

power switch cable

removal and replacement,

4-6

power-on password, 5-3 processor

removal and replacement,

4-24 spare part number, 2-3

rear panel connectors, 1-3 removal and replacement

battery, 4-27 bezel blank, 4-5 chassis fan, 4-29 computer cover, 4-3 diskette drive, 4-11 expansion boards, 4-15 external 5.25-inch drive,

4-10, 4-12

front bezel, 4-4 graphics cards, 4-17 hard drive, 4-8 memor y , 4-13 power supply, 4-28 power switch cable, 4-6 processor, 4-24

system board, 4-26 required tools and software, 3-5 retention mechanism, 4-17 return kit

spare part number, 2-5

screws

using correct, 3-5 serial number location, 1-5 service considerations, 3-5 setup password, 5-3 software

required, 3-5 spare part number

AGP card, 2-3

AIMM card, 2-3

cable kit, 2-2

CD-ROM drive, 2-2

DIMM, 2-3

diskette drive, 2-2

documentation, 2-5

front bezel, 2-1

graphics cards, 2-3

hard drive, 2-2

keyboards, 2-4

memory, 2-3

miscellaneous screw kit, 2-4

mouse, 2-5

Network Interface Card, 2-3

Nvidia graphics card, 2-3

power supply, 2-1

processor, 2-3

return kit, 2-5

system board, 2-3 specifications

CD-ROM drive, 6-8

diskette drive, 6-6

graphics cards, 6-10

hard drive, 6-7

keyboards, 6-9

mouse, 6-9

system, 6-1 system

specifications, 6-1

system board

connector locations, 5-1 connectors and jumpers, 5-1 removal and replacement,

4-26

spare part number, 2-3

system specifications

DMA, 6-2 I/O, 6-3 memor y map, 6-5

tools

required, 3-5

Ultra ATA devices, 4-7

I-2 Index

215877-001

201855-001

Hp Compaq Deskpro EX, Deskpro EX Maintenance & Service Guide

Specifications and Main Features

Frequently Asked Questions

User Manual