Compaq Deskpro 4000N - Desktop PC Maintenance & Service Manual

MAINTENANCE

& SERVICE GUIDE

Compaq Deskpro 4000N and 4000S

Network 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.



1997 Compaq Computer Corporation.

Compaq, Deskpro

Registered U. S. Patent and Trademark Office.

Microsoft, MS-DOS, and Windows are registered trademarks of Microsoft Corporation.

The software described in this guide is furnished under a license agreement or

nondisclosure agreement. The software may be used or copied only in accordance with

the terms of the agreement.

Product names mentioned herein may be trademarks and/or registered trademarks of their

respective companies.

Maintenance & Service Guide

Compaq Deskpro 4000S and 4000N Series of Personal Computers

Second Edition (August 1997)

First Edition (July 1997)

Part Number 288388-002

Spare Part Number 288457-001

Compaq Computer Corporation

CPS

Preface vii

preface

A

BOUT

T

HIS

G

UIDE

This

Maintenance and Service Guide

is a troubleshooting and repair guide that can be used for

reference when servicing the Compaq Deskpro 4000S and 4000N 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 the Compaq Deskpro 4000S

and 4000N Series of Personal Computers 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.

The following format conventions distinguish elements of the text throughout this guide:

■

Drive letters that are not in

command

lines are presented in uppercase type as shown here:

drive A.

■

Folder or directory names that are not in command lines are presented in uppercase type as

shown here: DIRECTORY.

■

The file names are presented in uppercase italic type as shown here:

FILENAME

.

■

The names of commands are presented in lowercase as shown here:

install

or a:\install.

■

Commands that are to be entered at the system prompt may be shown on a separate line:

a:\install

■

When you need to type information without pressing Enter, you are directed to “type” the

information.

■

When you need to type the information

and

press Enter, you are directed to “enter” the

information.

viii Preface

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.

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.

CAUTION:

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

AC power cord into a properly grounded AC outlet only.

System Serial Number

The serial number is located on the right side of the system unit cover on the bottom front.

For the purpose of AssetControl, the serial number is embedded in the CMOS on the system board.

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 Service Quick Reference Guide

Compaq Deskpro 4000S and 4000N Personal Computers 1-1

chapter

1

P

RODUCT

D

ESCRIPTION

This chapter describes the model offerings and features of the Compaq Deskpro 4000S and 4000N

Series of Personal Computers.

Figure 1-1.

Compaq Deskpro 4000S and 4000N Series Personal Computers

1-2 Product Description

1.1 Models

Table 1-1

Deskpro 4000S Models

Configuration

Code

Processor/

Speed*

Diskette

Drive

CD-ROM

Drive

Hard

Drive

Standard

Memory

Maximum

Memory

Internal

Cache

Internal

Graphics

BPC2 P55C/166 1.44-MB std n/a 2.1-GB 16-MB 256-MB 256-KB S3/KV2**

BPC3 P55C/166 1.44-MB std 20X max 2.1-GB 32-MB 256-MB 256-KB S3/KV2**

BPD2 P55C/200 1.44-MB std n/a 2.1-GB 16-MB 256-MB 256-KB S3/KV2**

BPD3 P55C/200 1.44-MB std 20X max 2.1-GB 32-MB 256-MB 256-KB S3/KV2**

BSL2 P55C/233 1.44-MB std n/a 2.1-GB 16-MB 256-MB 256-KB S3/KV2**

BSL3 P55C/233 1.44-MB std 20X max 2.1-GB 32-MB 256-MB 256-KB S3/KV2**

* P55C is an Intel Pentium Processor with MMX Technology.

**S3 Enhanced 64-bit Graphics.

Table 1-2

Deskpro 4000N Models

Configuration

Code

Processor/

Speed* Hard Drive

Standard

Memory

Maximum

Memory

Internal

Cache

Internal

Graphics

BQZ3 P55C/166 1.6-GB 16-MB 256-MB 256-KB S3/KV2**

BQZ2 P55C/166 1.6-GB 32-MB 256-MB 256-KB S3/KV2**

BQ22 P55C/200 1.6-GB 32-MB 256-MB 256-KB S3/KV2**

BSS2 P55C/233 1.6-GB 32-MB 256-MB 256-KB S3/KV2**

*P55C is an Intel Pentium Processor with MMX Technology.

**S3 Enhanced 64-bit Graphics.

Compaq Deskpro 4000S and 4000N Personal Computers 1-3

1.2 Features

Table 1-3

Features

Item Description

Processor

Speed, MHz

Intel Pentium Processor with MMX Technology

166, 200, 233

Cache

, capacity in Kb

L1 (P54C only)

L1 (P55C only)

L2 (write-through, direct mapped)

16

32

256

Architecture

CMOS RAM, battery backed

Plug and Play capability

PCI/ISA

242-byte

standard

Chipset

VIA Apollo VP-2

ROM BIOS

Flash memory device

Memory

, non-parity, 66 MHz, SDRAM (without ECC)

Base, MB

Maximum, MB

Upgrade modules available, MB

DIMM sockets

16 or 32

256

8, 16, 32, 64, 128

2

Bays

Deskpro 4000S

Deskpro 4000N

3.5-inch Internal/3.5-inch External/5.25-inch External Slimline

3.5-inch Internal

Expansion slot

Deskpro 4000S

Deskpro 4000N

One 7-inch PCI/ISA combination

One 7-inch PCI

Diskette drive

, 3.5-inch drive bay (Deskpro 4000S only)

Standard

Optional (replaces 1.44-MB drive)

1.44-MB

120-MB (LS-120)

Hard drive

, capacity in GB

Standard, EIDE with drive fault prediction

Optional, Ultra ATA with drive fault prediction*

Optional Ultra SCSI

1.6 (Deskpro 4000N), 2.1 (Deskpro 4000S)

2.4, 4.3

2.1, 4.2

CD-ROM drive

(Deskpro 4000S only) 20X max Slimline on select models

Audio

(Deskpro 4000S only)

Enhanced Business Pro Audio

Compaq Multimedia Sound System

Optional

Graphics

, embedded on system board S3 Trio 64V2/GX Enhanced 64-bit Graphics with 2-MB memory

Network interface

, embedded on system board Compaq Netelligent 10/100 TX Embedded UTP controller

*Drives are for replacement purposes only.

continued

1-4 Product Description

Table 1-2

Continued

Item Description

I/O ports, standard Serial (2)

Parallel

USB (2)

AUI

RJ-45

Monitor

Keyboard

Mouse

Power supply (2,000 volt surge suppressant capability) 76-watt, 115 VAC, 2.5 A/230 VAC, 1.25 A

Power supply fan Standard

Internal piezo speaker Standard

Internal battery Standard

Operating System

Deskpro 4000S

Deskpro 4000N

Windows 95

Windows NT

Intelligent Manageability features Asset Management

Fault Management

Security Management

Configuration Management

Integration Management

Two-button mouse Standard

Compaq Enhanced keyboard with MS Windows-specific keys Standard

1.3 Design Overview

The Compaq Deskpro 4000S and 4000N Series of Personal Computers are designed to use a pan-

type chassis to house the system board, expansion boards, power supply, and mass storage devices.

The chassis is supplemented by a riser board attached to the expansion board cage. The expansion

board cage provides a mounting location for the expansion board.

All internal components are accessible when the hood, held in place by two latches, is removed.

Lifting the Easy Access Drive Bay and Easy Access Power Supply to their upright positions allows

full access to the system board. The front bezel is mounted to the front of the system unit cover. Torx

T-15 screws are used to secure the Easy Access Drive Bay hinge bar and the Easy Access Power

Supply hinge bracket.

The system board is easily removed from the chassis after the hood and expansion board cage are

removed. Details of the disassembly procedure are found in Chapter 5, “Removal and Replacement

Procedures.”

The removable expansion board cage mounts perpendicular to the system board. The expansion

board installation is horizontal into the cage and is secured with a single screw.

The Easy Access Power Supply is mounted in the right rear corner of the chassis and pivots using a

pair of built-in hinges. The AC input cord must be removed prior to disconnecting the power supply

from the system board.

Compaq Deskpro 4000S and 4000N Personal Computers 1-5

1.4 Preloaded Software

The following Compaq software is preloaded on the computer:

■

Partition-based Compaq Diagnostics utilities

■

Compaq Diagnostics for Windows

■

Compaq support software and device drivers

■

Online Safety & Comfort Guide

■

Intelligent Manageability

■

Power Management with Energy Saver features

■

Security Management

■

Remote Management Tools

■

Microsoft Windows 95 (Deskpro 4000S)

■

Microsoft Windows NT (Deskpro 4000N)

1.4.1 Ordering Additional Operating System Drivers

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 or NetWare

■

Microsoft Windows 95 (for Deskpro 4000N)

■

Microsoft Windows NT (for Deskpro 4000S)

There are two methods to order copies of suitable device drivers and utilities:

■

Order the Support Software CD for Compaq Desktop Products. This compact disc contains the

latest device drivers, utilities, and flashable ROM images needed to run MS-DOS, Windows 3.1,

Windows 95, Windows NT 3.51 and 4.0, IBM OS/2, and NetWare on the Compaq commercial

desktop product.

■

Purchase backup diskettes.

The Support Software CD can be purchased in either of two ways:

■

A single CD-ROM that gives one-time access to the latest support software (North America

only).

■

A yearly subscription that delivers up to 12 monthly CD-ROMs.

The annual subscription provides continuous access to the latest developments, while the single CD-

ROM offers information as it is needed.

1-6 Product Description

✎✎

When calling Compaq to place an order, be sure to have the serial number of the computer

available. The location of the serial number is shown in Chapter 5. This number is necessary for

all purchases.

1.4.2 Intelligent Manageability

Intelligent Manageability combines innovative hardware technology with PC LAN management

tools to make Compaq computers easier to inventory, troubleshoot, protect, and maintain. Intelligent

Manageability features focus on:

■

Asset Management

■

Fault Management

■

Security Management

■

Configuration Management

■

Integration Management

Asset Management

AssetControl, a feature of Asset Management, reduces the time and cost associated with the physical

inventory of personal computers, key components, and monitors. AssetControl, hardware designed

and built into new Compaq personal computers, key components, and monitors, support the VESA

DDC2B, DIMM SPD, and EDID standards. AssetControl features:

■

Provide detailed information about various components, including:

❏

Manufacturer, model, and serial number of Compaq computers, monitors, hard drives, and

dual inline memory modules (DIMMs)

❏

Asset Tag

❏

System board and ROM revision level

❏

DMI BIOS

■

Allow you to view, print, or electronically save this date, and other system configuration details

using:

❏

Enhanced Compaq Insight Personal Edition

❏

Compaq Insight Manager

❏

PC LAN management products from the Compaq Desktop Management Solutions

❏

Management software product supporting the Desktop Management Interface Revision 2.0

(DMI 2.0)

■

Simplify and help ensure the accuracy of inventory and accounting procedures.

■

Streamline service calls by giving the administrator fast access to the Compaq personal computer

configuration and history

■

Remote software distribution procedures

Compaq Deskpro 4000S and 4000N Personal Computers 1-7

Fault Management

Fault management features combine innovative hardware and software technology to prevent the loss

of critical data and minimize unplanned downtime. When a fault occurs, the computer displays a

Local Alert message containing a description of the fault and any recommended actions. You can

then view current system health by using Compaq Insight Personal Edition. If the computer is

connected to a network managed by Compaq Insight Manager or other SNMP-based management

products, the computer also sends a fault notice to the network management application.

Fault Management features:

■

ECC fault prediction and prefailure warranty (with optional ECC memory only). ECC Fault

Prediction provides an alert when the computer encounters an excessive number of error

checking and correcting memory errors. The Prefailure Warranty for ECC memory modules

allows you to replace modules with errors while within the Compaq three year warranty, before

the memory module fails.

■

SMART II hard drives fault prediction monitor hard drive activity to predict failures before they

occur. Fault prediction and failure indication parameters, such as abnormal variations in spinup

and seek times, or non-correctable read and write errors, are tracked to determine the hard drive

condition.

■

Monitor fault diagnosis detects when the operating temperature exceeds the normal range or

when a hardware fault occurs, such as power voltage or current out of range, horizontal or

vertical deflection, or I/O controller failure

■

Ultra ATA Integrity Monitoring observes the integrity of data as it is transferred between an

optional Ultra ATA hard drive and the system’s core logic

■

Integrated surge-tolerant power supply provides protection when the computer is hit with an

unpredictable power surge.

■

Temperature Monitoring is a hardware and software feature that tracks the internal temperature

of the computer.

1-8 Product Description

Security Management

Security management features are designed to deter unauthorized access to data and help prevent

theft of the computer:

■

Removable media boot control prevents startup from the removable media drives.

■

Removable media write control prevents writing to the removable media drives.

■

Serial, Parallel, or USB interface control prevents transfer of data through the integrated serial,

parallel, or USB interface.

■

Power-on password prevents the use of the computer until the password is entered. This can

apply to both initial startup and restarts.

■

QuickLock/QuickBlank allows the user to lock the keyboard and/or blank the screen.

■

Setup Password prevents unauthorized changes to the system configuration.

■

Cable lock provision allows the user to physically secure the computer hardware to protect

against theft.

■

Memory Change Alerts detects when DIMMS have been added, moved, or removed and notifies

the end-user and system administrator.

■

Ownership tag displays the ownership information as defined by the system administrator during

the systems startup.

Configuration Management

Configuration management features include:

■

Remote ROM flash allows the system administrator to upgrade the ROM on remote computers

from the centralized network management console.

■

The FailSafe Boot Block ROM allows for system recovery in the event of a ROM flash failure.

■

Remote Security Management allows the system administrator to set or modify security features

on remote Compaq Deskpro 4000S and 4000N computers, directly from the centralized network

management console.

■

Remote Wakeup and Remote Shutdown allow the system administrator to power on and power

off a computer from a remote location, supported by PC LAN management tools.

■

Replicated Setup allows the system administrator to copy one Setup Configuration to other

computers of the same model.

■

Advanced Configuration and Power Interface (ACPI)-ready hardware.

■

Dual-state power button may be configured as suspend button for a quick recovery from a low

power state and promotes decreased power usage.

■

Enhanced Support Software CD and World Wide Web Site offer rigorously tested software

developed by Compaq and third-party suppliers, and operating-system specific support software

for Compaq computers.

Compaq Deskpro 4000S and 4000N Personal Computers 1-9

■

Compaq Integrated Software include bundles of appropriate support software ready for

automated installation on top of an off-the-shelf Microsoft operating system. Integrated software

is available in two formats: the Support Software CD for Compaq Desktop, Portable, and

Workstation Products and the Compaq World Wide Web site.

■

Universal Driver Manager is a release that supports the different graphics solutions found on

Compaq Deskpro 4000S and 4000N products.

Integration Management

Integration Management features include:

■

Compaq Insight Manager allows the LAN administrator to remotely view AssetControl data,

configuration data, memory change alerts, NIC performance data, and contact information. This

tool also provides access to Fault Management Features of the Compaq Deskpro 4000S and

4000N Series of Personal Computers.

■

Compaq Management Solutions Partners Program ensures compatibility and integration of

AssetControl features with leading PC LAN management products. These products provide

remote access to the AssetControl features so that LAN and PC administrators can manage

Compaq Deskpro 4000S and 4000N Series of Personal Computers information from a central

location.

Power Management

Power management features are listed below.

Table 1-4

Power Management

Feature Feature

APM support Hard disk “idle” mode

CD-ROM and audio board* support “power-down” Screen blanking

Dual State Power Button System “idle” mode

Energy Star compliant

*The audio board is optional equipment for the Deskpro 4000S only.

1-10 Product Description

1.5 External Computer Features

The Compaq Deskpro 4000S and 4000N Series of Personal Computers ship with a mouse and

keyboard. A Compaq color monitor or other compatible monitor, which is also required to operate

the computer, must be purchased separately.

1.5.1 Front Panel Controls and LEDs

Figure 1-2.

Front Panel Controls and Lights Deskpro 4000S

Table 1-5

Lights and Controls

Ref. Component Ref. Component

➊ Power Switch ➍ CD-ROM Drive*

➋ Diskette Drive Activity Light* ➎ Hard Drive Activity Light

➌ Diskette Eject Button* 6 Power-On Light

*Deskpro 4000S models only.

The lights on the computer provide information about computer operation. When the power switch

1

is turned on, the power-on light

6

is green.

When the hard drive light

5

or diskette drive light

➋

is on, the drive is either reading information

from the disk or storing information on the disk.

Compaq Deskpro 4000S and 4000N Personal Computers 1-11

1.5.2 Drive Positions

Figure 1-3.

Drive Positions on the Compaq Deskpro 4000S Computer

Table 1-6

Drive Positions

Drive Configuration

1 Standard 3.5-inch, third-height, 1.44-MB diskette drive*

2 5.25-inch drive bay for optional Slimline CD-ROM drive only*

3 Standard hard drive (3.5-inch, third-height)

*Deskpro 4000S models only.

To verify the type, size, and capacity of the mass storage devices installed in the computer, run the

View System Information (INSPECT) utility available at computer startup. Refer to Chapter 2,

"Compaq Utilities," for more information.

1-12 Product Description

1.5.3 Rear Panel Connectors and Indicators

Figure 1-4.

Rear Panel Connectors and Indicators

Table 1-7

Rear Panel Connectors and Indicators

Ref. Component Ref. Component

1 Voltage Select Switch 7 Parallel Connector

2 Ethernet RJ-45 Activity Lights 8 Serial Connector

3 AUI Connector 9 Ethernet RJ-45 Connector

4 Mouse Connector : Keyboard Connector

5 Power Cord Connection ; Monitor Connector

6 Universal Serial Bus (USB) Connector

Connectors are color-coded and include icons for ease of identification.

Compaq Deskpro 4000S and 4000N Personal Computers 1-13

1.6 Enhanced Keyboard

Figure 1-5.

Enhanced Keyboard

Table 1-8

Keyboard Features and Functions

Ref. Key Function

1 Ctrl Used in combination with another key, its effect depends on the software application

you are using.

2 Windows Logo Keys Opens the Windows Start menu. Used in combination with another key, its effect

depends on the software application you are using.

3 Alt Used in combination with another key, its effect depends on the software application

you are using.

4 Windows Application Key Opens a context menu for the software program you are using.

1-14 Product Description

The keyboard has feet on the bottom that enable the user to tilt the keyboard to a more comfortable

typing angle.

Figure 1-6.

Keyboard Tilt Foot

1.7 Select Options

Select options that are available from Compaq for the Compaq Deskpro 4000S and 4000N Series of

Personal Computers are described briefly in the following sections.

1.7.1 Monitors

■

QVision 210 Color Monitor*

■

Compaq 140 Color Monitor*

■

Compaq 141 Color Monitor*

■

Compaq P50 Color Monitor

■

Compaq P70 Color Monitor

■

Compaq P110 Color Monitor

■

Compaq V50 Color Monitor*

■

Compaq V70 Color Monitor

■

Compaq V90 Color Monitor

■

Compaq TFT500 Flat Panel Display

*Not available in all locations

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