Compaq AP400, Professional Workstation AP400 Maintenance And Service Manual

Professional Workstation AP400

Maintenance and Serv ice Guide

Third Edition (March 1999)
Part Number 317792-003
Spares Part Number 327709- 001
Compaq Computer Corporation

Notice

The information in this publication 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 INFORMATION IS PROVIDED

“AS IS” AND COMPAQ COMPUTER CORPORATION DISCLAIMS ANY WARRANTIES,
EXPRESS, IMPLIED OR STATUTORY AND EXPRESSLY DISCLAIMS THE IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE,
GOOD TITLE AND AGAINST INFRINGEMENT.

This publication contains information pr otected by copyright. No part of this public ation may be
photocopied or reproduced in any form without prior written consent from Compaq Computer
Corporation.

 1999 Compaq Computer Corporation.
All rights reserved. Printed in the U.S.A.

The software descr i bed 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.

Compaq, Compaq Insight Manager , ROMPaq, QVision, Smar tStart, NetFlex, QuickFind,
PaqFax, registered United States Patent and Trademark Office.

Netelligent, SoftPaq, QuickLock, Pr e mierSound are trademarks and/or service marks of Compaq
Computer Corporation.

Microsoft, MS-DOS , Windows, and Windows NT are re gistered trademarks of M i crosoft
Corporation.

Other product names mentioned herein may be trademarks and/or registered trademarks of their
respective companies.

Compaq Professional Workstation AP400 Maintenance and Service Guide

Third Edition (March 1999)
Part Number 317792-003
Spares Part Number 327709-001

Contents

About This Guide

Symbols in Text......................................................................................................................... vii

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

Where to Go for Additional Help...............................................................................................ix

Other Information Sources..................................................................................................ix

Integrated Management Display..........................................................................................ix

Telephone Numbers.............................................................................................................ix

Chapter 1

Illustrated Parts Catalog

Mechanical Parts ...................................................................................................................... 1-1

System Components .................................................................................................................1-2

Spares Parts List.......................................................................................................................1-3

Chapter 2

Service Preliminaries

Preliminary Warnings and Cautions.........................................................................................2-1

Electrostatic Discharge Information.........................................................................................2-2

Equipment Symbols..................................................................................................................2-2

Tools and Software Requirements............................................................................................2-3

Warranty Information...............................................................................................................2-3

iii

Chapter 3

Removal and Replacement Procedures

Serial Number...........................................................................................................................3-1

Service Preparations.................................................................................................................3-2

Cable Lock........................................................................................................................3-2

Workstation Cover....................................................................................................................3-3

Front Bezel...............................................................................................................................3-5

Blank Bezel..............................................................................................................................3-7

EMI Shield ...............................................................................................................................3-8

Speaker.....................................................................................................................................3-9

I/O Bracket Assembly ..............................................................................................................3-9

Important Guidelines for I/O Bracket Assembly Replacement....................................... 3-10

Graphics Controllers...............................................................................................................3-11

PCI Graphics Controller..................................................................................................3-11

Accelerated Graphics Port (AGP) Graphics Controller...................................................3-13

System Fan and Card Guide ...................................................................................................3-14

Backplane Board.....................................................................................................................3-15

Mass Storage Devices.............................................................................................................3-17

Drive Positions................................................................................................................3-17

5.25-inch Drives..............................................................................................................3-18

Diskette Drive .................................................................................................................3-20

Drive Cage.......................................................................................................................3-22

Bay 4...............................................................................................................................3-23

Bay 5...............................................................................................................................3-29

Compaq Professional Workstation AP400 Maintenance and Service Guide

iv

Removal and Replacement Procedures continued

System Board Assembly.........................................................................................................3-34

System Board With Tray Components............................................................................3-34

System Board With Tray Removal and Replacement......................................................3-36

Installing SCSI Devices..........................................................................................................3-38

Guidelines for Optimizing Performance..........................................................................3-39

SCSI Cables.....................................................................................................................3-39

Installing a Wide Ultra2 SCSI Controller........................................................................3-40

DIMMs...................................................................................................................................3-41

Important Guidelines for DIMM Installation ..................................................................3-42

DIMM Installation...........................................................................................................3-43

Processor and Heatsink...........................................................................................................3-44

Processor Power Module.................................................................................................3-45

Upgrading the Processor..................................................................................................3-46

Installing the Primary Processor Power Module Cable Insulator ....................................3-46

External Battery......................................................................................................................3-48

Power Switch and LED with Cables.......................................................................................3-50

Power Supply..........................................................................................................................3-50

Base Pan Cover.......................................................................................................................3-52

Base Pan Assembly................................................................................................................3-53

Chapter 4

Diagnostic Tools

Power-On Self-Test (POST).....................................................................................................4-1

POST Messages........................................................................................................................4-2

Troubleshooting Minor Problems.............................................................................................4-5

Power Problems.................................................................................................................4-6

Printer Problems................................................................................................................4-6

Diskette Drive Problems....................................................................................................4-7

Display Problems ..............................................................................................................4-8

Hardware Installation Problems ........................................................................................4-9

Hard Drive Problems.......................................................................................................4-10

CD-ROM and DVD-ROM Drive (IDE) Problems..........................................................4-11

Memory Problems...........................................................................................................4-11

SCSI Problems................................................................................................................4-12

Network Problems...........................................................................................................4-12

Audio Hardware Conflicts...............................................................................................4-13

Compaq Setup and Diagnostics Utilities.................................................................................4-14

Accessing the Compaq Setup and Diagnostics Utilities Menu........................................4-14

Diagnostic Error Codes...........................................................................................................4-18

Memory...........................................................................................................................4-19

Keyboard.........................................................................................................................4-19

Microprocessor................................................................................................................4-20

Printer.............................................................................................................................. 4-21

Diskette Drive .................................................................................................................4-21

Serial Port........................................................................................................................4-22

Modem ............................................................................................................................4-22

Pointing Device...............................................................................................................4-22

CD-ROM or DVD-ROM Drive (IDE)............................................................................4-23

Tape Drive.......................................................................................................................4-23

Audio...............................................................................................................................4-23

Video...............................................................................................................................4-24

Network Interface............................................................................................................4-25

Diagnostic Tools continued

SCSI Error Codes............................................................................................................... ....4-26

Upgrading the ROM...............................................................................................................4-28

Local ROM Flash............................................................................................................4-28

Remote ROM Flash.........................................................................................................4-29

FailSafe Boot Block ROM......................................................................................................4-29

Compaq Insight Manager .......................................................................................................4-31

Compaq Workstation Support Software for Microsoft Windows NT.....................................4-32

Compaq Diagnostics for Windows NT...................................................................................4-33

Chapter 5

System Security

Security Features......................................................................................................................5-1

Setup Password..................................................................................................................5-2

Power-on Password...........................................................................................................5-5

Windows NT Workstation Password.................................................................................5-8

National Keyboard Delimiter Characters ..........................................................................5-9

Advanced Security Management..............................................................................................5-9

Re-enabling Diskette Boot or Diskette Write..................................................................5-10

Re-enabling a Serial Port or Parallel Port........................................................................5-10

QuickLock...................................................................................................................... .5-11

Cable Lock Provision......................................................................................................5-12

Smart Cover Sensor.........................................................................................................5-12

v

Chapter 6

Jumper and Switch Information

Jumpers.....................................................................................................................................6-1

Switch Settings.........................................................................................................................6-2

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

4.3-GB Wide-Ultra SCSI Hard Drives..............................................................................6-3

9.1-GB Wide-Ultra SCSI Hard Drive................................................................................6-5

6.4-GB Ultra ATA Hard Drives........................................................................................6-6

8.4-GB Ultra ATA Hard Drive..........................................................................................6-8

10.1-GB Ultra ATA Hard Drive........................................................................................ 6-9

CD-ROM Drive and DVD-ROM Drive (IDE).......................................................................6-10

Fire GL 4000 Graphics Controller..........................................................................................6-11

PowerStorm 300/AGP Graphics Controller............................................................................6-12

Zip Drive................................................................................................................................6-13

Chapter 7

Physical and Operating Systems

System Unit..............................................................................................................................7-2

200W Power Supply.................................................................................................................7-8

Diskette Drive...........................................................................................................................7-9

CD-ROM Drive......................................................................................................................7-10

DVD-ROM Drive...................................................................................................................7-12

Zip drive.................................................................................................................................7-14

Hard Drives............................................................................................................................7-15

Audio System.........................................................................................................................7-20

Keyboard................................................................................................................................7-20

Compaq Professional Workstation AP400 Maintenance and Service Guide

vi

Physical and Operating Systems continued

Mouse.....................................................................................................................................7-21

Graphics Controllers...............................................................................................................7-22

Network..................................................................................................................................7-25

RJ-45 Network Cable Specifications...............................................................................7-25

Chapter 8

External Connectors

Physical Location.....................................................................................................................8-1

Pin Assignments.......................................................................................................................8-2

Index

About This Guide

This Maintenance and Service Guide is a troubleshooting guide that can be use d for reference
when servicing a Compaq Professional Workstation AP400.

IMPORTANT: The installation of options and servicing of this product shall be performed
by individuals that are knowledgeable of the procedures, precautions, and hazards
associated with equipment containing hazar dous energy circuits.

Symbols in Text

These symbols may be found in the te xt of this guide. They have the following meanings.

vii

WARNING: To reduce the risk of personal injury from electrical shock and
hazardous energy levels, only authorized service technicians should attempt to
repair this equi pment. Improper repairs could create conditions that are
hazardous.

WARNING: Indicates that failure to follow directions in the warning could result
in bodily harm or loss of life.

CAUTION: Indicates that failure to follow directions could result in damage to
equipment or loss of information.

IMPORTANT: Presents clarifying information or specific instructions.

NOTE: Presents commentary, sidelights, or interesting points of information.

Compaq Technician Notes

WARNING: Only authorized technicians trained by Compaq should attempt to

repair this equi pment. All troubleshooting and repair pr ocedures 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 ma y void any warranty.

WARNING: To reduce the risk of personal injury from electrical shock and
hazardous energy levels, do not exceed the level of repair specified in these
procedures. Because of the complexity of the individual boards and
subassemblies, do not attempt to make repairs at the component level or to make
modifications to a ny printed wiring board. Improper repairs could create conditions
that are hazardous.

Compaq Professional Workstation AP400 Maintenance and Service Guide

viii About This Guide

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

■ If the system has multiple power supplies, disconnect power from the system

by unplugging all power cords from the power supplies.

■ Do not disable the power cord grounding plug. The grounding plug is an

important safe ty feature.

■ Plug the power cord into a grounded (earthed) electrical outlet that is easily

accessible at all times.

WARNING: To reduce the risk of electric shock or damage to the equipment: Do
not disable the power cord 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 power from the workstation by
unplugging the power cord from either the electrical outlet or the workstation.

CAUTION: To properly ventilate your system, you must provide at least 6 inches
(15 cm) of clearance at the front and back of the computer.

CAUTION: The computer is designed to be elec trically grounded. To ensure
proper operation, plug the AC power cord into a properly grounded AC outlet only.

CAUTION: Electrostatic discharge can damage electronic components. Be sure
you are properly grounded before beginning any install ation procedure. See

“Electrostatic Discharge Information” in Chapter 2 for more information.

IMPORTANT: Any indication of repair at the component level or modification of a printed
wiring board ma y void any warranty.

Where to Go for Additional Help

Major sources of additional information are listed below.

Other Information Sources

In addition to this guide, the following information sources are available:

■ User Documentation

■ Compaq Service Quick Refere nce Guide

■ Service Training Guides

■ Compaq Service Advisories and Bulletins

■ Compaq QuickFind

■ Compaq Insight Manager

■ Compaq Download Facility: Call 1-281-518-1418

Integrated Management Display

ix

Some Compaq server mode ls include a Compaq Integrated Management Display (IMD ) is an
integrated, 16x4 charact er display mounted on the front of the se rver. This display provides
easy-to-use menu-driven access to server information, including model number, LCD firmware
revision, and POST operations.

Telephone Numbers

For the name of your nearest Compaq Authorized Reseller:
In the United States, call 1-800-345-1518
In Canada, call 1-800- 263-5868
For Compaq technical support:
In the United States and Cana da, call 1-800-386-2172
For Compaq technical support phone num bers outside the United States and Canada, visit the

Compaq website at:

http://www.compaq.com

Compaq Professional Workstation AP400 Maintenance and Service Guide

Chapter 1

2

6

7

1

5

3

8

4

Illustrated Parts Catalog

This chapter provides an illustrated parts breakdown and a reference for spare parts for the
Compaq Professional Workstation AP400.

Mechanical Parts

1-1

Figure 1-1. Exploded view of the Compaq Professional Workstation AP400 mechanical parts

Compaq Professional Workstation AP400 Maintenance and Service Guide

1-2 Illustrated Parts Catalog

23

40

39

31

10

12

11

28

46

2

77

18

5

25

9

15

111

72

22

115

48

21

50

System Components

Figure 1-2. Exploded view of the Compaq Professional Workstation AP400 system components

Spares Parts List

Parts or components mar ke d w ith an asterisk are not illustrated.

Reference Description Spares Part #

MECHANICAL

1 Workstation Cover 327653-001
2 I/O Bracket 299383-001
3 Hard Drive Mounting Bracket (Bay 5) 299380-001
4 EMI Shield 327650-001
5 Base Pan 327652-001
6 Drive Cage 297517-001
7 Base Pan Cover with Feet 327654-001

1-3

Table 1-1

Compaq Professional Workstation AP400

Spares Parts List

8 Front Bezel 327645-001

SYSTEM

9 System Fan 297515-001
10 Speaker 327656-001
11 Power Supply 327651-002
12 System Board with Tray (for 350/400/450 MHz processors) 317706-001
13 System Board with Tray (for 350/400/450/500 MHz processors) 402124-001*
14 Intel Pentium II Processor, 350/100 MHz, 512K with heatsink 327647-001*
15 Intel Pentium II Processor, 400/100 MHz, 512K with heatsink 327648-001
16 Intel Pentium II Processor, 450/100 MHz, 512K with heatsink 328785-001*
17 Intel Pentium III Processor, 500/100 MHz, 512K with heatsink 116402-001*
18 Power Module (Voltage Regulator) for 350/400/450 MHz Processors 327660-001
19 Power Module (Voltage Regulator) for 350/400/450/500 MHz Processors 329267-001*
20 Lock Security Bracket 199109-001*
21 External Battery 160274-001

Continued

Compaq Professional Workstation AP400 Maintenance and Service Guide

1-4 Illustrated Parts Catalog

Spares Parts List - Compaq Professional Workstation AP400

Continued

Reference Description Spares Part #

SYSTEM

22 Expansion Board Slot Cover 141081-001
23 Power Switch and LEDs with Cable 327655-001

MEMORY

24 32-MB Memory Module (Registered 100-MHz SDRAM) 317747-001*
25 64-MB Memory Module (Registered 100-MHz SDRAM) 317745-001
26 128-MB Memory Module (Registered 100-MHz SDRAM) 317756-001*
27 256-MB Memory Module (Registered 100-MHz SDRAM) 317749-001*

MASS STORAGE

28 4.3-GB Wide-Ultra SCSI Hard Drive (7200 RPM) 339514-001
29 4.3-GB Wide-Ultra SCSI Hard Drive (10K RPM) 336383-001*
30 4-GB Wide Ultra2 SCSI Hard Drive (7200 RPM) 349533-001*
31 6.4-GB Ultra ATA Hard Drive (7200 RPM) 166973-001
32 8.4-GB Ultra ATA Hard Drive (7200 RPM) 166981-001*
33 9.1-GB Wide-Ultra SCSI Hard Drive (7200 RPM) 339515-001*
34 9.1-GB Wide-Ultra SCSI Hard Drive (10K RPM) 336384-001*
35 9.1-GB Wide Ultra2 SCSI Hard Drive (7200 RPM) 349534-001*
36 9.1-GB Wide Ultra2 SCSI Hard Drive (10K RPM) 386539-001*
37 10.0-GB Ultra ATA Hard Drive (5400 RPM) 320662-001*
38 10.0-GB Ultra ATA Hard Drive (7200 RPM) 330520-001*
39 1.44-MB Diskette Drive 179161-001
40 32X Max CD-ROM Drive (IDE) 327659-001
41 DVD-ROM Drive 105771-001*
42 Zip Drive 401624-001*
43 12/24-GB DAT Drive 340593-001*
44 4/8-GB SLR Drive 340591-001*
45 Hard Drive Mounting Bracket (Bay 4) 243231-001*
46 Backplane Board 317707-001
47 Hard Drive Mounting Bracket with Fans 329176-001*

Continued

1-5

Spares Parts List - Compaq Professional Workstation AP400

Continued

Reference Description Spares Part #

CABLE KITS

48 Miscellaneous Signal Cable Kit (CD-ROM, HD, Diskette) 327649-001
49 CD-ROM Audio Cable 171139-001*
50 SCSI Cable, Wide 297511-001
51 SCSI Cable, Wide Ultra2, 4-device 402226-001*
52 SCSI Adapter, 50- to 68-Pin (internal) 189638-001*
53 Cable, 4-Port Splitter (MVP Pro-128) 299386-001*

KEYBOARD/MOUSE

54 Keyboard 269513-001*
55 3-Button Mouse 327716-001*

MONITOR

56 P75 Monitor 307815-xxx*
57 V75 Monitor 307713-xxx*
58 V90 Monitor 305602-xxx*
59 QVision 210 Monitor 210407-xxx*
60 P1610 Monitor 305710-001*
61 P110 Monitor 284959-001*
62 P110 Monitor (INT) 284959-B23*
63 TFT 500:

(PN 285012-001)

64 TFT 450:

(PN 170431-001)

Order TFT 500 spare parts from the TFT 500 guide

*

Order TFT 500 spare parts from the TFT 450 MSG

*
65 TFT5000 Aoki Flat Panel Monitor - TC099, carbon, touch screen, NA 115712-001*
66 TFT5000 Aoki Flat Panel Monitor - TC099, opal, touch screen, NA 115714-001*
67 TFT8000 Indian Chief Flat Panel Monitor - TC095, carbon, with protective

102360-B29*

panel, WW

68 TFT8000 Indian Chief Flat Panel Monitor - TC095, carbon, without protective

102359-B24*

panel, WW

69 TFT8000 Indian Chief Flat Panel Monitor - TC095, opal, with protective

102358-B24*

panel, WW

70 TFT8000 Indian Chief Flat Panel Monitor - TC095, opal, without protective

307911-001*

panel, WW

Continued

Compaq Professional Workstation AP400 Maintenance and Service Guide

1-6 Illustrated Parts Catalog

Spares Parts List - Compaq Professional Workstation AP400

Continued

Reference Description Spares Part #
GRAPHICS

71 Fire GL 4000 Graphics Controller 298797-001*
72 GLoria Synergy+ Graphics Controller (AGP) 327599-001
73 4-MB Memory Upgrade (GLoria Synergy+) 327600-001*
74 GLoria Synergy Graphics Controller (PCI) 298796-001*
75 GLoria-XL 3D Graphics Controller 247520-001*
76 16-MB Memory Upgrade (GLoria-XL) 297919-001*
77 Matrox Millennium II Graphics Controller 270242-001
78 12-MB WRAM Memory Upgrade (Millennium II) 270262-001*
79 4-MB WRAM Memory Upgrade (Millennium II) 270260-001*
80 Matrox Millennium G200 (AGP) Graphics Controller 294409-001*
81 8-MB Memory Module (Millennium G200) 386047-001*
82 Matrox Productiva G100 Multi-Monitor Series 101239-001*
83 MVP Pro-128 Graphics Controller (4-port) 327657-001*
84 PowerStorm 300 (AGP) Graphics Controller 338539-001*
85 PowerStorm 300 (PCI) Graphics Controller 329177-001*

CONTROLLERS

86 Wide Ultra2 SCSI Controller 114009-001*
87 Compaq SMART-2SL Array Controller 242777-001*

COMMUNICATIONS

88 Netelligent 16/4 TR PCI IBM UTP/STP Controller 301210-001*
89 Netelligent 16/4 TR PCI UTP/STP Controller 268010-001*
90 Netelligent 10 T/2 PCI UTP/Coax Controller 292857-001*
91 Netelligent 100 FDDI PCI SAS Fiber-SC 242506-002*
92 Netelligent 100 FDDI PCI DAS Fiber-UTP 242506-003*
93 Netelligent 100 FDDI PCI SAS Fiber-UTP 242506-004*
94 Netelligent 100 FDDI PCI SAS Fiber-MIC 242506-005*
95 Netelligent 56K ISA Fax Modem 294912-001*
96 Compaq Fast Ethernet NIC NC3122 317453-001*

Continued

1-7

Spares Parts List - Compaq Professional Workstation AP400

Continued

Reference Description Spares Part #

COMMUNICATIONS

97 Compaq Fast Ethernet NIC NC3120 317606-001*
98 Compaq Ethernet NIC NC1120 317358-001*
99 Compaq Fast Ethernet NIC NC3161 323556-001*

SOFTWARE

100 Magellan Driver CD 297863-001*
101 Spaceball Driver CD 298033-001*
102 Microsoft Windows NT Workstation 4.0 CD 275573-xx1*
103 Compaq SmartStart for Workstations CD 275574-xx2/-xx1 (SP)*
104 System ROMPaq 275595-001*
105 Compaq Setup and Compaq Diagnostics for Workstations Diskette 275575-xxx*

MISCELLANEOUS

106 Magellan 3D Pointing Device (spacemouse) 297645-001*
107 Spaceball 3D Pointing Device 297644-001*
108 Compaq Multimedia Sound System (US) 294122-001*
109 Country Kit 350686-001*
110 Heatsink Bridge 327658-001*
111 Miscellaneous Plastics Kit (card guide, bracket, and ½H blank bezel) 297518-001

112 Shipping Box with Buns (US) 297789-001*
113 Shipping Box with Buns (INTL) 297789-002*
114 SCSI Adapter, 68- to 50-Pin (external) 270229-001*
115 Miscellaneous Hardware Kit (NLX slot cover) 166877-001

DOCUMENTATION

116 Maintenance and Service Guide 327709-001*
117 Illustrated Parts Map 327708-001*
118 Service Quick Reference Guide (revision -038) 162212-001*

*Not illustrated

Compaq Professional Workstation AP400 Maintenance and Service Guide

Chapter 2

Service Preliminaries

This chapter identifies the following service considerations:

■ Preliminary warnings and cautions

■ Electrostatic discharge information

■ Equipment symbols

■ Tools and software requirements

■ Warranty information

IMPORTANT: Adherence to the procedures and precautions described in this chapter is
essential for proper service.

Preliminary Warnings and Cautions

The following should be noted when operating or servicing the Compaq Professional
Workstation AP400:

2-1

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

■ If the system has multiple power supplies, disconnect power from the system

by unplugging all power cords from the power supplies.

■ Do not disable the power cord grounding plug. The ground plug is an

important safe ty feature.

■ Plug the power cord into a grounded (earthed) electrical outlet that is easily

accessible at all times.

WARNING: To reduce the risk of personal injury from hazardous energy levels,
only authorized service technicians should attempt to repair this equipment.
Because of the complexity of the individua l 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.

CAUTION: The power supply in the Compaq Professional Workstation AP400 has
an auxiliary power section. This section is always active as long as the unit is
plugged into a live AC outlet. Be sure to turn off the switch and unplug the power
cord before performing any service work.

CAUTION: To properly ventilate the system, you must provide at least 6 inches
(15 cm) of clearance at the front and back of the workstation.

Compaq Professional Workstation AP400 Maintenance and Service Guide

2-2 Service Preliminaries

IMPORTANT: Any indications of component replacement or printed wiring board

modifications may void any warranty.

Electrostatic Discharge Information

A discharge of static electricity can damage static-sensitive devices or microcircuitry. Proper
packaging and grounding techniques are necessary precautions to prevent damage. To prevent
electrostatic damage, observe the following precautions:

■ Transport products in static-sa fe containers such as conductive tubes, bags, or boxes.

■ Keep electrostatic-sensitive parts in their containers until they arrive at static-free stations.

■ Cover workstations with approved static-dissipating material. Provide a wrist strap

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

■ Keep work area free of non-conductive mater i als such as ordinary plastic assem bly a i ds

and foam packing.

■ Be sure you are always prope rly grounded when touching a static-sensitive component or

assembly.

■ Avoid touching pins, leads, or circuitry.

■ Always place drives PCB assembly-side down.

■ Use conductive field servic e tools.

Equipment Symbols

The following symbols are locat ed on applicable components of the worksta tion and should be
observed when servicing the workstation to avoid personal injury or damage to the components:

WARNING: Any surface or area of the equipment marked with these
symbols indicates the presence of a hot surface or hot component. If this
surface is contacted, the potential for injury exists. To reduce risk of
injury from a hot component, allow the surface to cool before touching.

WARNING: Any surface or area of the equipment marked with these
symbols indicates the presence of electrical shock hazards. Enclosed
area contains no operator serviceable parts. To reduce risk of injury from
electrical shock hazards, do not open this enclosure.

WARNING: Any RJ-45 receptacle marked with these symbols
indicates a Network Interface Connection. To reduce risk of electrical
shock, fire, or damage to the equipment, do not plug telephone or
telecommunications connectors into this receptacle.

Tools and Software Requirements

To service the workstation, you mi ght need:

■ Torx T-10 screwdriver

■ Torx T-15 screwdriver

■ Flat-blade screwdriver

■ Compaq Setup and Diagnostics Utility

IMPORTANT: Before servicing the workstation, be sure that the drivers for the latest
Compaq Workstation Support Software for Windows NT are installed. See Chapter 4 for
installation procedures.

Warranty Information

The workstation comes standard with the following warranties:

■ Standard Warranty—A three-year limited warranty that cover s three years on parts, one

year on labor, and one ye ar of onsite service or carry-in service.

2-3

■ Pre-Failure Warranty—A special warranty that extends the Compaq three-year limited

warranty by applying it to critical system components before they fail. This warranty
ensures that when you receive notification of a prefailure condition through Compaq
Insight Manager or the Windows NT Event Log, the component is replaced under
warranty.

NOTE: For more information about Compaq Insight Manager, see Chapter 4.

The Pre-Failure War ranty covers the following workstation c omponents:

❏ SCSI hard drives
❏ Error Correcting Code (ECC) memory
❏ Pentium II processor

In addition to the above warrantie s, an optional Extended Warranty is available. If purchased,

this warranty extends the Standar d Warranty’s one year coverage for labor and onsite ser vic e or
carry-in by two additional years.

IMPORTANT: Observe all warnings and cautions provided herein. Failure to do so may void
warranty for damaged components.

Compaq Professional Workstation AP400 Maintenance and Service Guide

Chapter 3

Removal and Replacement Procedures

This chapter provides subassembly/module-level removal and replacement pr ocedures for the
Compaq Professional Workstation AP400.

After completing all necessary removal and replacement procedures, run the Compaq Setup and
Diagnostics program to veri fy that all components are oper ating properly.

Serial Number

Provide the computer serial number to Compaq whe never you request information or order spare
parts. The serial number is located on the right side of the workstation cover ➊ and also on the
rear of the chassis above the fan ➋.

For asset control, the seria l number is also embedded in the EP RO M on the system board with
tray. If the system board with tray is replaced with a spare part from Compaq, an invalid serial
number condition will be reported during POST. To clear the condition, reenter the original
serial number through Computer Setup.

3-1

NOTE: If a system board with tray from another workstation is installed, POST recognizes the

serial number as a valid number .

2

1

Figure 3-1. Serial number locations

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-2 Removal and Replacement Procedures

Service Preparations

CAUTION: The power supply in the Compaq Professional Workstation AP400

has an auxiliary power section. This section is always active as long as the unit is
plugged into a live AC outlet. Be sure to turn off the switch and unplug the power
cord before performing any service work.

CAUTION: Electrostatic discharge can damage electronic components. Be sure
you are properly grounded before beginning any install ation procedure. See

“Electrostatic Discharge Information” in Chapter 2 for more information.

Before beginning any of the removal and replacement procedures, complete the following steps:

1. Turn off the workstation.

2. Disconnect the power cord from the grounded AC outlet and then from the workstation.

3. Turn off all peripheral devices and disconnect cables f rom the rear of the wor ksta tion.

NOTE: For more information on preparing the workstation for service, see Chapter 2.

Cable Lock

The workstation comes standard w ith a cable lock provision for attaching a pa dlock and/or cable
lock. If installed, the locks must be removed before accessing internal components.

To remove the lock:

1. Unlock and remove the cable lock and/or the padlock 1.

2. Remove the security bracket (plate) seated over the cable lock bracket 2.

3. Unfasten the retaining screw to release the cable lock bracket 3.

1

2

3

Figure 3-2. Removing the padlock

Workstation Cover

To remove the workstation cove r:

1. Perform the service preparations descr i bed on page 3-2.

2. If the cable lock mechanism is installed, remove it.

3. Loosen the three thumbscrews on the back of the workstation.

3-3

CAUTION: Do not operate the workstation with the cover removed. The cover is

an integral part of the cooling system; removing it whil e the system is running may
adversely affect data integrity.

Figure 3-3. Loosening the thumbscrews on the workstation cover

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-4 Removal and Replacement Procedures

4. Rotate the workstation cover up, r emove the front lip of the cover from under the front
bezel, and lift off the cover.

Figure 3-4. Removing the workstation cover

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

To replace the workstation cover:

1. Be sure all grounding clips and EMI gaskets (shielding strips) are in place.

2. Hold the cover in an almost vertic al position, and hook the front lip of the cover behind
the front bezel. Then, rotate the cover down onto the unit.

3. Tighten the thumbscrews on the rear of the workstation.

Front Bezel

The front bezel is mounted to the chassis with release levers that are integrated into the bezel.
To remove the front bezel:

1. Perform the service preparations on page 3-2.

2. Remove the worksta tion cover.

3. From the inside of the unit, push up on the top release levers and push dow n on the

3-5

bottom release levers.

Figure 3-5. Locating the front bezel release levers

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-6 Removal and Replacement Procedures

4. Pull the bezel straight out and away from the chassis.

IMPORTANT: When separating the bezel from the chassis, be sure to pull it straight out to
avoid the push button on the diskette drive.

Figure 3-6. Removing the front bezel

To replace the front bezel:

1. Line up the release levers at the top of the bezel with the appropriate slots on the front of
the chassis.

2. Press the bezel in to secure the release levers.

Blank Bezel

To remove the blank bezel from the front bezel:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the following components:

3. With the inside of the front bezel facing you, push the tab on the blank bezel to the

4. Push the blank bezel out through the inside of the front bezel ➋.

3-7

❏ workstation cover
❏ front bezel

right ➊.

1

2

Figure 3-7. Removing the blank bezel

To replace the blank bezel and reassemble the workstation, reverse the above steps.

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-8 Removal and Replacement Procedures

EMI Shield

If your system has an EMI shield, remove it by completing the following steps:

1. Perform the service preparations on page 3- 2.

2. Remove the following components:

❏ workstation cover
❏ front bezel
❏ hard drive from bay 5 (if installed)

3. Remove the two screws that connect the EMI shield to the drive cage.

IMPORTANT: Do not remove the guide screws. They are for alignment only.

4. Slide the EMI shield out of the drive slot.

Figure 3-8. Removing the EMI shield

Speaker

3-9

To remove the speaker:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ front bezel

3. Remove the two T-15 screws securing the front of the speaker to the chassis.

4. Unplug the speaker connector from the system board with tray.

5. Remove the speaker fr om the workstation by sliding it back, then lifting it up and out of
the chassis.

Figure 3-9. Removing the speaker

To replace the speaker and reassemble the workstation, reverse the above steps.

I/O Bracket Assembly

The I/O bracket assembly (expansion board bracket) contains a backplane board (riser card), fan
and card guide, graphic s controller, and any expansion boards.

To remove the I/O bracket assembly:

1. Perform the service preparations described on page 3-2.

2. Remove the worksta tion cover.

CAUTION: The power supply in the Compaq Professional Workstation AP400
contains an auxiliary power section. Be sure the power switch is off and the unit is
unplugged before rem oving the I/O bracket assembly in the next step.

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-10 Removal and Replacement Procedures

3. Grasp the I/O bracket assembly and pull it up and out of the chassis.

Figure 3-10. Removing the I/O bracket assembly

Important Guidelines for I/O Bracket Assembly
Replacement

To replace the I/O bracket assembly (expansion board bracket), you MUST follow these steps:

1. Grasp the assembly and insert it into the chassis and connector on the system board with
tray. Press firmly on the I/O bracket assembly, where the backplane is connected to the
system board with tray.

2. Plug in the power cord, but DO NOT turn on the power sw itch.

3. The auxiliary power section of the power supply should now be active. If the I / O bracket
assembly is not seated properly when the auxiliary power is active, the power LED will
be lit amber. Unplug the system and reseat the assembly. Once the assembly is seated
properly, unplug the workstation before continuing with additional service.

WARNING: DO NOT turn on the power switch unless the I/O bracket assembly is
seated properly. For safety, DO NOT turn on the power switch until the workstation
is completely reassembled.

Graphics Controllers

The workstation ships standard with a gra phics controller installed in one of the expansion slots
on the backplane board (r i ser card) or in the AG P connector on the system boar d with tray.

PCI Graphics Controller

NOTE: The following procedure is also applicable for the removal of an expansion board.

To remove the graphics c ontroller:

1. Perform the service preparations described on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ I/O bracket assembly (expansion board bracke t)

3. Remove the retaining scre w securing the graphics controller .

4. Slide the graphics controller out of the expansion slot.

3-11

CAUTION: If you permanently remove the graphics controller or an expansion

board, install a protective slot cover to ensure proper cooling.

Figure 3-11. Removing the graphics controller (half-length)

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-12 Removal and Replacement Procedures

Figure 3-12. Removing a graphics controller (full length)

To replace the graphics controller and reassemble the workstation, reverse the above steps.
Be sure to engage the card guide located behind the fan w hen replacing a full-length graphics

controller.

IMPORTANT: Before replacing the I/O bracket assembly, read “Important Guidelines
for I/O Bracket Assembly Replacement” earlier in this chapter.

Accelerated Graphics Port (AGP) Graphics Controller

To remove the AGP graphics controller:

1. Perform the service preparations on page 3- 2.

2. Remove the workstation cover.

3. Remove the T-15 screw that holds the AGP graphics controller in place.

4. Hold the graphics controller at both ends and pull up.

CAUTION: If you permanently remove the graphics controller, install a
protective slot cover to ensure proper cooling.

3-13

Figure 3-13. Removing the AGP Graphics Controller

NOTE: The system board with tray is shown out of the chassis and without the I/O bracket
assembly for clarity.

To replace the AGP graphics controller and reassemble the workstation, reverse the above steps.

NOTE: Make sure that you press the graphics controller firmly into place.

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-14 Removal and Replacement Procedures

System Fan and Card Guide

To remove the system fan and card guide:

1. Perform the service preparations described on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ I/O bracket assembly (expansion board bracke t)
❏ graphics controller (if installed)

3. Disconnect the fan cable from the backplane board (riser card) and disengage the cable
from the clip on the backplane board.

4. Remove the T-10 screw connecting the fan and card guide to the I/O bracke t assembly.

5. Pivot the fan and card guide a s shown, easing the hinges out of the slots and a way from
the I/O bracket assembly.

6. Separate the fan fr om the card guide.

Figure 3-14. Removing the system fan and card guide

To replace the system fan and card guide and to reassemble the workstation, reverse the above
steps.

IMPORTANT: Before replacing the I/O bracket assembly, read “Important Guidelines for I/O
Bracket Assembly Replacement” earlier in this chapter.

Backplane Board

The backplane board (riser card) is attached to the I/O bracket assembly (expansion board
bracket) by retaining scr ews.

The backplane board contains six expansion slots, five of which are a va ilable at any one time.
The following illustration identifies the physica l location of slots 1-6. See the corresponding
table for component names.

3-15

1
2

5

3
4

Figure 3-15. Overview of PCI/ISA expansion slots

Reference

1 PCI slot
2 PCI slot
3* PCI slot
4* ISA slot

6

Table 3-1

PCI/ISA Slots

5 PCI slot
6 ISA slot

*Slots 3 and 4 are shared. They cannot be used simultaneously.

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-16 Removal and Replacement Procedures

To remove the backpla ne board:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ I/O bracket assembly
❏ fan cable
❏ PCI graphics controller (if installed)
❏ expansion boards (if installed)

3. Remove the two T-15 screws that secure the backplane board to the I/O bracket assembly.

4. Remove the backplane board from the I/O bracket assembly.

Figure 3-16. Removing the backplane board

To replace the backplane board and reassemble the workstation, reverse the above steps.

IMPORTANT: Before replacing the I/O bracket assembly, read “Important Guidelines
for I/O Bracket Assembly Replacement” earlier in this chapter.

NOTE: When replacing the backplane board, align the top edge of the board with the slots in the
I/O bracket assembly.

Mass Storage Devices

This section discusses removal and replacement procedures for the mass storage devices
supported on the Compaq Professional Wor ksta tion AP400.

Drive Positions

The Compaq Professional Workstation A P400 can house up to five mass storage devices. The
following illustration identifies the physical drive loca tions. See the corresponding table for a list
of the recommended drive configurations.

3-17

1

2

Figure 3-17. Drive positions

3

4 5

Table 3-2

Drive Positions

Bay Bay Width Bay Height Device Configurations

1

3.5-inch bay Third-Height Standard 1.44 MB diskette drive (1.0”)

2

3.5-inch internal hard drive bay Third-Height Optional hard drive (1.0”)

3

3.5- or 5.25-inch bay Third-Height or Half-Height Standard (1.6” CD-ROM drive)

4

3.5- or 5.25-inch bay Third-Height or Half-Height Optional 1.0” or 1.6” hard drive, tape drive, CD­ROM, DVD-ROM, or Zip drive

5

3.5-inch internal hard drive bay Third-Height Standard 1.0” hard drive

CAUTION: An EMI shield must be installed in bays 3 and 4 unless a removable
media device is present.

NOTE: Compaq does not support mixing ATA and SCSI hard drives.

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-18 Removal and Replacement Procedures

5.25-inch Drives

To remove a 5.25-inch drive:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ front bezel
❏ hard drive from bay 5 (if installed)

NOTE: If there is a hard drive in bay 5, you must remove it to access the mounting holes for the
retaining screws securing the drive assembly. For information on removing a hard drive from
bay 5, see “Bay 5” later in this chapter.

3. Disconnect all cables from the rear of the 5.25-inch drive.

Figure 3-18. Disconnecting the cables from the 5.25-inch drive

4. Remove the two screws securing the right side of the 5.25-inch drive.

5. Pull the 5.25-inch drive stra ight out of the chassis.

Figure 3-19. Removing the 5.25-inch drive

3-19

To replace the 5.25-inch drive and reassemble the workstation, reverse the above steps.
Be sure to transfer the guide screw from the old drive to the new one. The screw is installed on

the left front side of the dr ive. Note that extra guide scre w s are provided on the front of the
chassis.

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

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

CAUTION: Do not route cables near the intake of the power supply. Cables
routed in this manner may block airflow to the power supply causing it to
overheat.

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-20 Removal and Replacement Procedures

Diskette Drive

Before beginning the remova l procedure, make sure there is no diskette in the drive.

NOTE: A standard hard drive in bay 2 can be remov ed using the same steps used to remove a
diskette drive .

To remove the diskette drive from the drive bay:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ front bezel
❏ I/O bracket assembly (expansion board bracke t)

3. Remove the retaining screws securing the drive cage to the front of the chassis.

NOTE: Depending on your model, you may have 3 or 4 retaining screws.

4. Extend the drive cage slightly from the chassis.

NOTE: It is not necessary to completely remove the drive cage to remove any drives.

Figure 3-20. Extending the drive cage

5. Disconnect the cables from the back of the diskette drive.

Figure 3-21. Disconnecting the cables from the diskette drive

6. Remove the diskette drive front and rear retaining screws.

3-21

7. Pull the diskette drive straight out of the drive cage.

Figure 3-22. Removing the diskette drive

To replace the diskette drive, the drive cage, and reassemble the workstation, reverse the above
steps.

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

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-22 Removal and Replacement Procedures

CAUTION: When servicing the workstation, make sure cables are placed in their

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

CAUTION: Do not route cables near the intake of the power supply. Cables
routed in this manner may block airflow to the power supply, causing it to
overheat.

NOTE: If you are replacing the drive with a new one, transfer the guide screw from the old
drive to the new one. Make sure the guide screw is placed in the first hole on the right side of the
drive. Extra guide screws are provided on the front of the chassis.

Drive Cage

To remove the drive cage:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ front bezel
❏ power and signal cables connected to drives in drive cage
❏ any 5.25-inch drive

NOTE: Remove the retaining screws before extending the drive cage from the chassis.
Depending on your model, you may hav e 3 or 4 retaining screws.

3. Rotate the drive cage down at a 45-degree angle and pull it out of the cha ssis.

Figure 3-23. Removing the drive cage

To replace the drive cage and reassemble the workstation, reverse the above steps.

Bay 4

3-23

Bay 4 supports both 3.5-inch and 5.25-inch devices. For a 3.5-inc h device, a special m ounting
bracket is required.

NOTE: Compaq does not support mixing IDE and SCSI hard drives.

Installing a 3.5-inch device

NOTE: This procedure describes the installatio n of a 3.5-inch hard drive. The same procedure

can be used for installing any 3.5-inch device in bay 4.

NOTE: If you are installing or removing a 10K RPM hard drive, see “Removing and Replacing a
10K RPM Hard Drive in Bay 4” later in this section.

To install an optional 3.5-inch drive in bay 4:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ front bezel
❏ EMI shield (if installed)

3. Insert the drive into the mounting bracket 1.

4. Insert the screws into the holes on each side of the bracket to secure the drive 2.

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

1

2

Figure 3-24. Installing the 3.5-Inch hard drive in the mounting bracket

2

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-24 Removal and Replacement Procedures

5. Install one metric guide scr ew into the front hole on the left side of the bracket. The guide
screw is used to align the bracket in the drive bay.

6. Insert the drive assembly into the drive bay. Make sure the guide screw aligns with the
slot in the drive bay.

7. Secure the 3.5-inch device in the drive cage with two metric retaining screws on the right
side of the device.

Figure 3-25. Installing the 3.5-Inch hard drive and securing it with retaining screws

NOTE: If there is a hard drive in bay 5, you must remove it to access the mounting holes for the
retaining screws securing the drive assembly. For information on removing a hard drive from
bay 5, see “Bay 5” later in this chapter.

8. Connect the cables to the rear of the drive.

Figure 3-26. Connecting the signal and power cables

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

CAUTION: Do not route cables near the intake of the power supply. Cables
routed in this manner may block airflow to the power supply causing it to
overheat.

9. Remove the blank bezel from the front bezel, if necessary. (If you are installing a hard
drive, leave the blank bezel in place for proper cooling.)

10. Replace the front bezel and the workstation cover.

To remove a 3.5-inch device from Bay 4, reverse the above steps.

NOTE: The system recognizes a Compaq hard drive and automatically reconfigures the
computer.

Installing a 5.25-inch device

NOTE: If you are removing or installing a 10K RPM hard drive, see “Removing and Replacing a

10K RPM Hard Drive in Bay 4” later in this section.

3-25

To install a 5.25-inch device in Bay 4 (not illustrated):

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ front bezel
❏ EMI shield (if installed)

3. Install one metric guide scr ew into the front hole of the left side of the device. The guide
screw is used to align the device in the bay.

4. Insert the 5.25-inch device into the bay. Ensure the guide screw aligns with the slot in the
bay.

5. Secure the device in the drive cage with two metric retaining screws on the right side of
the device.

NOTE: If there is a hard drive in bay 5, you must remove it to access the mounting holes for the
retaining screws securing the drive assembly. For information on removing a hard drive from
bay 5, see “Bay 5” later in this chapter.

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-26 Removal and Replacement Procedures

6. Connect the cables to the rear of the drive.

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

CAUTION: Do not route cables near the intake of the power supply. Cables
routed in this manner may block airflow to the power supply, causing it to
overheat.

7. Remove the blank bezel from the front bezel.

8. Replace the front bezel and the workstation cover.

To remove a 5.25-inch device in Bay 4, revers e the above steps.

Removing and Replacing a 10K RPM Hard Drive in Bay 4

To remove a 10K RPM ha rd drive from Bay 4:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ front bezel
❏ 5.25-inch drive (to access hard drive cables)
❏ hard drive from bay 5 (if installed)

NOTE: If there is a hard drive in bay 5, you must remove it to access the mounting holes for the
retaining screws securing the drive assembly. For information on removing a hard drive from
bay 5, see "Bay 5" in this chapter.

3. Disconnect the power cable leading from har d drive to the power supply 1 and the

signal 2 and power cables 3 from rear of hard drive.

3-27

3

1

Figure 3-27. Disconnecting signal and power cables

2

4. Remove the retaining screws 1, then remove the bracket/hard drive assembly 2.

2

1

Figure 3-28. Removing bracket/hard drive assembly from Bay 4

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-28 Removal and Replacement Procedures

5. Remove the retaining screws 1, then remove the inner hard drive bracket f rom the
mounting bracket 2. Remove the retaining screws from the inner bracket 3 and slide the
hard drive from the bracket 4.

2

1

3

3

4

1

Figure 3-29. Removing the hard drive from the bracket

To install a new 10K RPM hard drive, replace the bracket assembly, and reassemble the
workstation, reverse the a bove steps.

Bay 5

3-29

Bay 5 is an internal bay (bracke t ) that supports third-height (1.0”) or half-height (1.6”) har d
drives. Bay 5 is located inside the chassis to the right of the drive cage. Installation and removal
procedures are unique for this bay.

NOTE: Compa q does not support mixing IDE and SCSI hard drives.

To install a hard drive in bay 5:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the workstation cover.

3. Remove the screw securing the hard drive bracket to the chassis ➊.

4. Slide the bracket toward the rear of the workstation, then remove the bracket ➋.

1

Figure 3-30. Removing the hard drive bracket (Bay 5)

5. Place the hard drive in the bracket.

2

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-30 Removal and Replacement Procedures

6. Secure the hard drive with the four screws provided on the bracket.

Figure 3-31. Installing a hard drive in the hard drive mounting bracket

7. Install the hard drive/bracket assembly by sliding it toward the front of the workstation ➊.
Make sure to engage the tab on the back of the bracket in the slot provided on the side of
the drive cage.

8. Secure the hard drive/bracket assembly to the drive cage with the screw provided ➋.

2

Figure 3-32. Installing a hard drive/bracket assembly

1

9. Connect the drive power and signal cables to the back of the drive.

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

CAUTION: Do not route cables near the intake of the power supply. Cables
routed in this manner may block airflow to the power supply, causing it to
overheat.

3-31

Figure 3-33. Connecting the signal and power cables to a hard drive

10. Replace the workstation cover.

To remove a hard drive from Bay 5, reverse the above steps.

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-32 Removal and Replacement Procedures

Removing and Replacing a 10K RPM Hard Drive in Bay 5

To remove a 10K RPM ha rd drive from Bay 5:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ front bezel

3. Disconnect the power cable leading from the hard drive to the power supply 1 and the
signal 2 and power cable 3 from the rear of the hard drive.

2

Figure 3-34. Disconnecting power and signal cables

3

1

4. Remove the retaining screw 1, then slide the bracket with hard drive from Bay 5 as shown

2.

2

1

Figure 3-35. Removing the bracket with hard drive from Bay 5

5. Remove the retaining screws 1, then remove the hard drive from the bracket 2.

3-33

1

1

2

Figure 3-36. Removing the hard drive from bracket

To install a new 10K RPM hard drive, replace the bracket assembly, and reassemble the
workstation, reverse the a bove steps.

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-34 Removal and Replacement Procedures

System Board Assembly

The system board assembly contains the DIMMs, Pentium II or Pentium III processor/heat sink,
processor power module(s), system board with tray, the AGP Graphics Controller (i f installed),
and the external battery (if installed). Each component is spared separately.

It is not necessary to fully remove the system board with tray from the chassis to replace system
board components, but you must extend it from the chassis in order to access some components.

System Board With Tray Components

The components on the system board with tray are illustrated in the following figure. Refer to
the corresponding table for component names.

5

1

16

Figure 3-37. System board with tray components

2 3

2 4

4

1415

7

6

8

9

10

11

12

13

Reference Component

1 Power Switch and LED Header
2 Power Connector
3 External Battery Jumper
4 Diskette Drive Connector
5 Secondary IDE Connector
6 Primary IDE Connector
7 SCSI Connector
8 Primary Processor Power Module
9 Secondary Processor Power Module Slot

- Secondary Processor Slot

3-35

Table 3-3

System Board With Tray Components

q Primary Processor
w SW1 Switch
e DIMM Sockets 1 - 4
r AGP Graphics Controller Connector
t 3-Pin Wake-On-LAN header (J28)
y Expansion Board Connector

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-36 Removal and Replacement Procedures

System Board With Tray Removal and Replacement

CAUTION: Electrostatic discharge can damage electronic components. Be sure

you are properly grounded before beginning any install ation procedure. See

“Electrostatic Discharge Information” in Chapter 2 for more information.

To remove the system board with tray:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ I/O bracket assembly (expansion board bracke t)

3. Disconnect and remove all cables plugged into the system board with tray.

NOTE: The cables for the speakers are not located in the same area as the other cables. Ensure
that you have removed the speaker cable before proceeding.

4. Grasp the back edge of the system board with tray and slide it out of the chassis.

Figure 3-38. Removing the system board with tray

To install a new system board with tray:

1. Remove the following components f rom the system board with tray that you have
removed:

❏ DIMMs
❏ processor(s)
❏ Processor Power Module( s)
❏ external battery (if installed)
❏ AGP Graphics Controller (if installed)

2. Install the components on the new system board with tr ay. Before reinstalling the

DIMMs, see “Important Guidelines for DIMM Installation” later in this chapter.

3. Slide the new system board with tray into the chassis.

4. Connect all cables to the new system board with tray.

5. Replace the I/O bracket assembly and the workstation cover.

IMPORTANT: Before replacing the I/O bracket assembly, read “Important Guidelines for I/O
Bracket Assembly Replacement” earlier in this chapter.

3-37

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-38 Removal and Replacement Procedures

Installing SCSI Devices

All workstation models use three areas for connecting mass storage SCSI devices: internally
with hard drive in the removable hard drive cage, internally with storage devices in the front
panel drive bays, and externa lly w ith external storage devices. The workstation has an integrated
Wide-Ultra SCSI controller that has one internal connector on the system board and one external
connector on the rear panel.

■ If you are installing a narrow SCSI device, you will need to attach a 68- to 50-pin SCSI

adapter to the narrow SCSI device.

■ To preserve data integrity, do not install more than seven SCSI devices per SCSI

controller.

■ A unique SCSI ID (0-7) must be set for each SCSI device installed. Before you install a

SCSI device, verify the SCSI ID of the drive, and if necessary, set the SCSI ID to a
unique ID number.

■ The controller identifies a SCSI device by its SCSI ID number rather than its bay location.

Therefore, moving a SCSI device from one bay location to another or changing the
position of the device on the SCSI chain does not affect the communication between the
controller and the SCSI device.

■ The reserved and available SCSI ID numbers for SCSI devices are as follows:
❏ SCSI ID 0 is reserved for the primary hard drive (boota ble drive).
❏ SCSI ID 7 is reserved for the controller.
❏ SCSI IDs 1-6 are available.

■ Every SCSI chain or circuit must be terminated (close d) at both ends. If using a

terminated cable, disable the te rmination for all devices. If using a non-terminated cable,
onlydsiable the termination for the last device on the chain.

■ Turn on an external SCSI device before turning on power to the workstation. This enables

the system board controller to r ecognize the external SCSI devic e.

■ When an external SCSI device is connected to the external SCSI connector on the rear

panel of the workstation, that devic e becomes the end of the SCSI cha i n and must be
terminated.

■ SCSI drives on the SCSI controller must be either internal or in an external storage

system, but not both.

CAUTION: Do not route cables near the air intake to the power supply or the
airflow to the power supply may be blocked, causing overheating.

Guidelines for Optimizing Performance

■ To maintain Ultra speeds, do not insta ll more than four SCSI devices on a SCSI bus.

■ Do not mix Wide-Ultra and nar row SCSI devices on the same SCSI chain or the same

controller.

For additional information about optional SCSI devices, refer to the doc umentation included
with the device.

SCSI Cables

The workstation ships standard with a Wide-Ultra or Wide Ultra2 SCSI cable that has a
terminator on one end. The other end of this cable connects to the internal Wide-Ultra SCSI
connector on the system board.

3-39

Figure 3-39. 4-device Wide-Ultra SCSI cable

NOTE: The SCSI cable included with the workstation may look slightly different than the one
pictured.

When installing a Wide Ultra2 SCSI hard dr ive, a Wide Ultra2 SCSI cable is required (not
shown).

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-40 Removal and Replacement Procedures

Installing a Wide Ultra2 SCSI Controller

If you have a Wide Ultra 2 SCSI hard drive installed, you ca n enhance drive perfor mance by
installing an optional PCI Controller.

NOTE: For best performance, do not mix Wide-Ultra and Wide Ultra2 SCSI hard drives on the
same SCSI cable or channel.

1. Turn off the workstation and disconnect the power cord from the grounded AC outlet and
the back of the workstation.

2. Remove the following components:

❏ Side access panel
❏ Expansion board assembly

3. Install the Wide Ultra2 SCSI Controller. T he second PCI slot is the recommended
location for the Wide Ultra2 SCSI Controller.

4. Connect the Wide Ultra2 SCSI Controller cable to one of the connectors on top of the
controller.

NOTE: The cable must be installed before replacing the expansion board assembly .

5. Connect the Wide Ultra2 SCSI Controller cable to the connector on the rear of the hard
drive.

Figure 3-40. Connecting the Wide Ultra2 SCSI Controller to the Hard Drive

6. Connect the power cable to the rear of the hard dive.

7. Replace the expansion board assembly.

8. Reassemble the workstation.

DIMMs

3-41

To remove a DIMM:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ I/O bracket assembly (expansion board bracke t)

NOTE: If an AGP graphics controller is installed, it must be removed.

3. Press outward on both latches of the DIMM at the same time ➊. This releases the module
and pushes it partially out of the socket.

4. Lift the module from the socket ➋.

IMPORTANT: Before replacing the I/O bracket assembly, read “Important Guidelines for I/O
Bracket Assembly Replacement” earlier in this chapter.

NOTE: The system recognizes memory upgrades and automatically reconfigures the
workstation.

1

2

Figure 3-41. Removing a DIMM

1

To replace a DIMM and reassemble the workstation, reverse the above steps.

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-42 Removal and Replacement Procedures

Important Guidelines for DIMM Installation

When installing DIMMs, you MUST follow these guidelines:

■ Use only 32-, 64-, 128-, or 256-MB Registered 100-M Hz Error Checking and Cor recting

(ECC) SDRAM DIMMs.

■ DIMMs must have a 4-KHz refresh rate.

■ DO NOT INSTALL DIMMS THAT DO NOT SUPPORT ERROR CHECKING

AND CORRECTING (ECC).

■ A DIMM can be installed one way only. Be sure to match the two key slots on the DI MM

with the tab on the DIMM socket. Push the DIMM down into the DIMM socket, ensuring
that it is fully inserted and properly seated.

■ When upgrading, do not exceed 1 GB total. The system will not boot with upgrades

exceeding 1 GB.

CAUTION: When handling a DIMM, be careful not to touch any of the contacts.
Doing so may damage the module.

DIMM Installation

IMPORTANT: Registered 100-MHz ECC SDRAM DIMMs must be used. Before installing

additional DIMMs, read the previous section, “Important Guidelines for DIMM Installation.”

The Compaq Professional Workstation A P400 supports Registered 100-MHz ECC SDRA M
DIMMs. Additional DI MMs (32-, 64-, 128-, or 256-MB) are available to upgrade the memory.
The workstation has four DIM M sockets located on the system boar d w ith tray that support up to
a maximum of 1 GB.

The following illustration identifies the physical location of all DIMM sockets. Note that
DIMMs do not need to be installed in pairs, and can be installed in any of the ava ilable DIMM
sockets.

3-43

4
3
2
1

Figure 3-42. Location of DIMM sockets

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-44 Removal and Replacement Procedures

Processor and Heatsink

WARNING: To reduce the risk of personal injury from hot surfaces, allow the

internal system components to cool before touching.

To remove the processor and heatsink:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ I/O bracket assembly (expansion board bracke t)
❏ system board with tray

3. Push in the latches on each side of the processor until you hear two clicks ➊. This locks
the tabs in the open position. Then slide out the processor ➋.

2

1

1

Figure 3-43. Removing the processor and heatsink

NOTE: Your processor may look different from the one shown above.

NOTE: For clarity, the Secondary Processor Power Module is not shown.

To replace the processor and heatsink and to reassemble the workstation, reverse the above
steps. When replacing the processor, push the processor tabs outward. The tabs will click twice,
locking the processor to the system board with tray.

NOTE: Install the primary processor and heatsink in the primary processor slot.

IMPORTANT: Before replacing the I/O bracket assembly, read “Important Guidelines for I/O

Bracket Assembly Replacement” earlier in this chapter.

Processor Power Module

CAUTION: Electrostatic discharge can damage electronic components. Be sure

you are properly grounded before beginning any install ation procedure. See

“Electrostatic Discharge Information” in Chapter 2 for more information.

The processor power m odule is located on the system board with tra y. To remove the processor
power module:

1. Perform the service preparations desribed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ I/O bracket assembly (expansion board bracke t)

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

NOTE: For better access to the processor power module, you may need to slide the system
board with tray out half way.

3. Press outward on both latches of the processor power module at the same time ➊, then lift
it from the system board with tray ➋.

3-45

1

2

Figure 3-44. Removing the processor power module

To replace the processor power module and reassemble the workstation, reverse the above steps.

IMPORTANT: Before replacing the I/O bracket assembly, read “Important Guidelines for
I/O Bracket Assembly Replacement” earlier in this chapter.

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-46 Removal and Replacement Procedures

Upgrading the Processor

Compaq Professional Workstations ship with a 350-, 400-, or 450- MHz Pentium II processor or
a 500-MHz Intel Pentium III processor installed on the system board with tray as the primary
processor.

NOTE: When you upgrade the primary processor, it is not necessary to upgrade or remove the
primary processor power module. However, if you do remove the primary processor power
module, you must reattach the cable insulator to the replacement module. The cable insulator is
required only for the primary processor power module and protects cables from exposed leads.

Installing the Primary Processor Power Module
Cable Insulator

CAUTION: Static electricity can damage the electronic components of the

workstation. Before beginning these procedures, make sure you are discharged of
static electricity by briefly touching a grounded metal object.

To install the cable insulator:

1. Perform the necessary service preparations described on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ I/O bracket assembly (expansion board bracke t)

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

NOTE: For better access to the processor power module, you may need to slide the system
board with tray out half way.

3. Press outward on both latches of the processor power module at the same time, then lift it
from the system board with tray.

4. Place the cable insulator over the end of the primary processor power module.

Figure 3-45. Installing the primary processor power module cable insulator

5. Firmly press the primar y processor power module and c able insulator into the power
module connector. Secur e the two latches on the connector.

3-47

NOTE: The latches of the primary processor power module connector hold the cable insulator in

place.

6. Reassemble the workstation.

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-48 Removal and Replacement Procedures

External Battery

The real-time clock battery that came with the workstation is permanently installed on the
system board with tray. If the original battery becomes inoperative, you must install a second
battery.

WARNING: The system board with tray contains a clock/CMOS lithium batter y.
The lithium battery may explode if mistreated. The battery is soldered in and may
not be removed. Do not abuse or disassemble. Use only replacement ba tteries
supplied by Compaq Computer Corporation.

CAUTION: Electrostatic discharge can damage electronic components. Be sure
you are properly grounded before beginning any install ation procedure. See

“Electrostatic Discharge Information” in Chapter 2 for more information.

NOTE: It is important to make a set of backup diagnostics diskettes before you install a new
battery.

To install the external real-time clock battery:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ I/O bracket assembly (expansion board bracke t)

3. Remove the backing from the adhesive on the hook-and-loop f astener strip.

4. Connect the battery to J5 pins 1 - 4.

1

Figure 3-46. Attaching the replacement battery

5. Move the jumper from pins 6 and 7 ➊ to pins 5 and 6 ➋.

1

1

1

Figure 3-47. Changing the jumper from pins 6-7 to pins 5-6

6. Replace the I/O bracket assembly and the workstation cover.

3-49

2

IMPORTANT: Before replacing the I/O bracket assembly, read “Important Guidelines for I/O
Bracket Assembly Replacement” earlier in this chapter.

7. Place the sticker included with your battery kit on the back of the workstation above the
power connector.

8. Reassemble workstation.

9. Plug in the workstation and reconnect a ny external devices.

WARNING: This equipment is designed for connection to a grounded (earthed)
outlet. The grounding type plug is an important safety feature. To avoid the risk of
electrical shock or damage to the equipment, do not disable this feature.

10. Turn on the workstation.

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-50 Removal and Replacement Procedures

Power Switch and LED with Cables

The power switch can be replaced without removing the power supply. To remove the power
switch:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ hard drive bracket in bay 5

Figure 3-48. Removing the plastic switch holder

NOTE: The bezel is removed for clarity.

3. Remove the power switch and LED with cables from the clips on the chassis.

4. Remove the connector from the system board with tray.

To replace the power switch holder and reassemble the workstation, reverse the above steps.

Power Supply

To remove the power supply:

1. Perform the service prepara tions described on page 3-2.

2. Remove the worksta tion cover.

3. Disconnect all power cables.

4. If necessary, extend the drive cage slightly from the chassis.

NOTE: To facilitate reassembly, note the orientation of each cable connector and the routing of
each cable before you remove it.

5. Remove the three sc rews that secure the power supply to the back of the chassis.

6. Slide the power supply toward the front of the chassis; lift up to rem ove it.

3-51

Figure 3-49. Removing the power supply

To replace the power supply assembly and reassemble the workstation, reverse the above steps.

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

■ If the system has multiple power supplies, disconnect power from the system

by unplugging all power cords from the power supplies.

■ Do not disable the power cord grounding plug. The grounding plug is an

important safe ty feature.

■ Plug the power cord into a grounded (earthed) electrical outlet that is easily

accessible at all times.

WARNING: This procedure should be performed only by qualified personnel. Do
not reconnect power to the computer until the computer cover is replaced.
Connecting the power before replacing the computer cover can result in personal
injury or equipm ent damage.

IMPORTANT: Make sure that the voltage selector switch is in the correct voltage position.

Compaq Professional Workstation AP400 Maintenance and Service Guide

3-52 Removal and Replacement Procedures

Base Pan Cover

To remove the base pa n cover:

1. Perform the service preparations desrc i bed on page 3-2.

2. Remove the following components:

❏ workstation cover
❏ front bezel
❏ I/O bracket assembly (expansion board bracke t)
❏ system board with tray

3. Turn the workstation on its end, with the front bezel end up.

4. Locate the tab on the bottom of the base pan cover and lift it with a flat-head screwdriver .

5. Pull the base pan cover toward the front bezel end until it stops.

6. Lift the base pan cove r off the base pan assembly.

Figure 3-50. Removing the base pan cover

To replace the base pan cover and reassemble the workstation, reverse the above steps.

Base Pan Assembly

The base pan assembly is the chassis or the frame that is left after removing all components. To
remove the base pan a ssembly:

1. Perform the service preparations descr i bed on page 3-2.

2. Remove components in the follow i ng sequence:

❏ workstation cover
❏ front bezel
❏ I/O bracket assembly ( expansion bracket assembly)
❏ hard drive bracket
❏ 5.25-inch drive (if installed)
❏ drive cage
❏ system board assembly
❏ power supply assembly
❏ base pan cover

3-53

To replace or install a new base pan assembly, reverse the above steps.

Compaq Professional Workstation AP400 Maintenance and Service Guide

Chapter 4

Diagnostic Tools

This chapter provides the following inf ormation to assist you when servicing the Compaq
Professional Workstation AP400:

■ Power-On Self-Test (POST)

■ Compaq Setup and Diagnostics Utilities

■ Error Codes

■ ROMPaq

■ Compaq Insight Manager

■ Compaq Workstation Support Software for Microsoft Windows NT

■ Compaq Diagnostics for Windows NT

IMPORTANT: Adherence to the procedures and precautions described in this chapter is
essential for proper service.

4-1

Power-On Self-Test (POST)

POST is a series of diagnostic tests that runs automatically when the system is turned on. Af te r
the computer is turned on, POST checks the following assemblies to make sure that the
computer system is functioning properly:

■ Keyboard

■ DIMMs

■ Graphics controller

■ Diskette drives

■ IDE/CD-ROM or DVD-ROM drive

■ Hard drives

■ Processors

■ Controllers

POST also detects the type of SCSI mass storage devices installed in the workstation.

NOTE: If the Power-on Password is set, a key icon (
running. You will need to enter the password before continuing. See Chapter 5 for information on
deleting or bypassing the Power-on Password.

) appears on the screen while POST is

If POST finds an error in the system, an audible and/or visual message occurs. For expla na tions
of the error codes and a recommended c ourse of action, see Ta ble 4-1 in the next section.

Compaq Professional Workstation AP400 Maintenance and Service Guide

4-2 Diagnostic Tools

POST Messages

An error message results if the POST encounters a problem. This te st runs when the system is
turned on, checking assemblies within the w orkstation and reporting any errors found.

Message Beeps* Probable Cause Recommended Action

101-ROM Error 1L, 1S System ROM checksum Replace the system board with

101-Option ROM Checksum
Error

102-System Board Failure None DMA, timers, etc. Replace the system board with

162-System Options Error 2S No diskette drive or mismatch in

162-System Options
Not Set

163-Time & Date Not Set 2S Invalid time or date in

164-Memory Size Error 2S Memory configuration incorrect Run Computer Setup or Windows

172-1 Configuration
Nonvolatile Memory Invalid

201-Memory Error None RAM failure 1. Run Computer Setup or Windows NT

202-Memory Type Mismatch None Invalid memory configuration 1. Run Computer Setup or Windows NT

203-Memory Address
Error

205-Memory Error None Processor Cache memory error Run the Setup and Diagnostics

206-Secondary cache
controller failure

207-ECC Failure 2S Single Bit ECC error Replace DIMM if error persists.
*L = Long, S = Short

Table 4-1

POST Messages

tray.

1L, 1S The ROM on an ISA card is bad Remove the cards one at a time to

drive type

2S Configuration incorrect Run Computer Setup or Windows

configuration memory

None Invalid NVRAM Content Allow the system to completely boot,

None RAM failure 1. Run Computer Setup or Windows NT

None Cache memory controller or RAM

failure

isolate the defective card, or

1. Verify the correct system ROM.

2. Flash the system ROM to the latest
revision, if required.

3. Contact Compaq technical support.

tray.
Run Computer Setup or Windows

NT utilities.

NT utilities.
Run Computer Setup or Windows

NT utilities, or set the date and
time by booting from a DOS
diskette.

NT utilities.

then reboot.

utilities.

2. Replace the DIMMs.

utilities.

2. Replace the DIMMs.

utilities.

2. Replace the DIMMS.

3. Replace the system board with tray.

utilities.
Run the Setup and Diagnostics

utilities.

Continued

4-3

POST Messages

Continued

Message Beeps* Probable Cause Recommended Action

210-Invalid Memory
Configuration Detected.

None Too much memory installed Reduce memory installed by

removing DIMMs.
Maximum of 1 GB of Memory
Supported. System Halted.

212-Failed Processor 1L Processor has failed to initialize Replace the processor and/or the

Processor Power Module.
301-Keyboard Error None Keyboard failure Reconnect keyboard with computer

turned off.
301-Keyboard Error or Test

None Keyboard failure Replace the keyboard.

Fixture Installed
303-Keyboard Controller

Error

None I/O board keyboard controller 1.Reconnect keyboard with computer

turned off.

2. Replace the system board with tray.

304-Keyboard or System Unit
Error

40X-Parallel Port X Address
Assignment Conflict

402-Monochrome
Adapter Failure

404-Parallel Port Address
Conflict Detected

None Keyboard failure 1.Replace the keyboard.

2. Replace the system board with tray.

2S Port address conflict. Run Computer Setup or Windows

NT utilities.

1L, 2S Monochrome display controller Replace the monochrome display

controller.

2S Both external and internal ports are

assigned to parallel port X

Run Computer Setup or Windows

NT utilities.
501-Display Adapter Failure 1L, 2S Video display controller Replace the graphics controller.
601-Diskette Controller Error None Diskette controller circuitry or

floppy drive circuitry incorrect

1. Run Computer Setup.

2. Check and/or replace cables.

3. Replace diskette drive.

4. Replace the system board with tray.

605-Diskette Drive Type Error 2S Mismatch in drive type Run Computer Setup or Windows

NT utilities.
611-Primary Floppy Port

Address Assignment

2S Configuration error Run Computer Setup or Windows

NT utilities.
Conflict

612-Secondary Floppy Port
Address Assignment

2S Configuration error Run Computer Setup or Windows

NT utilities.
Conflict

1151-System board with
tray COM Port 1 Address

2S

Both external and internal serial
ports are assigned to COM1

Run Computer Setup or Windows

NT utilities.
Assignment Conflict

1152-System board with
tray COM Port 2 Address
Assignment Conflict

1155-COM Port Address
Assignment Conflict

1610-Temperature
Violation Detected

2S Both external and internal serial

ports are assigned to COM2

Run Computer Setup or Windows

NT utilities.

2S COM port address conflict Run Computer Setup or Windows

NT utilities.

None Internal temperature exceeds

specification

Turn off the workstation and let it

cool. Check that computer air vents

are not blocked and cooling fan is

running.
*L = Long, S = Short

Continued

Compaq Professional Workstation AP400 Maintenance and Service Guide

4-4 Diagnostic Tools

POST Messages

Message Beeps* Probable Cause Recommended Action

1611-Fan Failure Detected None Fan(s) not functional Check that the fan(s) are not

1720-IntelliSafe Hard Drive
Detects Imminent Failure

1720-SMART Hard Drive
Detects Imminent Failure

1771-Primary Disk Port
Address Assignment
Conflict

1772-Secondary Disk
Port Address Assignment
Conflict

1780-Disk 0 Failure None IDE Hard drive/format error Run the Setup and Diagnostics

1781-Disk 1 Failure None IDE Hard drive/format error Run the Setup and Diagnostics

1782-Disk Controller
Failure

1790-Disk 0 Failure None IDE Hard drive error or wrong

1791-Disk 1 Failure None IDE Hard drive error or wrong

1792-Secondary Disk
Controller Failure

1793-Secondary Controller
or Disk Failure

XX000Y ZZ Parity Check 2 None Parity RAM failure Run the Setup and Diagnostics

A Correctable Memory Error
Occurred Prior to this
Power-Up

A Critical Error Occurred
Prior to this Power-Up.

Fixed Disk Parameter Table
or BIOS Error System
Halted

Invalid Electronic
Serial Number

(RESUME = F1 KEY) None As indicated to continue Press F1.
*L = Long, S = Short

Continued

blocked and can rotate freely.

Replace failing fan.

None IDE hard drive is about to fail Backup contents and replace hard

None SCSI hard drive is about to fail Backup contents and replace hard

2S Internal and external IDE hard drive

controllers are both assigned to
the primary address

2S Internal and external IDE hard drive

controllers are both assigned to
the secondary address

None IDE Hard drive circuitry error Run the Setup and Diagnostics

drive type

drive type

None IDE Hard drive circuitry error Run the Setup and Diagnostics

None IDE Hard drive circuitry error, or a

CD-ROM/DVD-ROM interface error

None Single bit ECC error during

previous POST

None Critical Error (NMI) during previous

POST

3L Configuration or hardware failure Run the Setup and Diagnostics

None Electronic serial number has

become corrupted

drive.

drive.

Run Computer Setup or Windows

NT utilities.

Run Computer Setup or Windows

NT utilities.

utilities.

utilities.

utilities.

Run the Setup and Diagnostics

utilities.

Run the Setup and Diagnostics

utilities.

utilities.

Run the Setup and Diagnostics

utilities.

utilities.

1. Run Computer Setup or Windows NT
utilities.

2. Replace the DIMMs.

Determined by NMI source.

utilities.

Run Computer Setup.

Troubleshooting Minor Problems

If minor hardware or software problems occur, refer to the following list for possible solutions
before running any of the diagnostic utilities.

■ Verify that the workstation is connected to a working grounded AC outlet.

■ Is the workstation turned on and the power light illuminated?

■ Check all cable connections. Make sure the connectors are seated properly.

■ Is the monitor turned on and the power light illuminated?

■ If the monitor is dim, turn up the brightness and contrast controls of the m onitor.

■ Are all of the necessary device drivers installed?

■ Have all printer drivers been installed for each application?

■ Was a nonbootable diskette loaded in the diskette dr ive at powerup?

■ Was a bootable compact disc in the CD-ROM drive at powerup?

■ Check all switch and jumper settings.

■ Was Computer Setup run after installing options (memory, disk drives , expansion boards,

etc.) and industry-standard architecture (ISA ) boards?

4-5

In addition to the above checklist, see the next few sections for other possible solutions to:

■ Power Problems

■ Diskette Drive Problems

■ Display Problems

■ Printer Problems

■ Hard Drive Problems

■ Hardware Installation Problems

■ IDE CD-ROM/DVD-ROM Drive Problems

■ Memory Problems

■ SCSI Problems

■ Network Problems

■ Audio Hardware Conflicts

Compaq Professional Workstation AP400 Maintenance and Service Guide

4-6 Diagnostic Tools

Power Problems

This section identifies some quick checks for power-related problems.

Problem Possible Solution

Computer will not turn on. Make sure the workstation is connected to a power source.

Computer does not automatically display the date and
time.

Computer powered off automatically. The unit temperature may have been exceeded. Check the

Table 4-2

Solutions for Power Problems

Make sure the processor(s) and terminator board are
properly seated.

Check to see if cables to the external power source are
unplugged. Make sure cables connecting the workstation
and the external source are plugged in properly. Make sure

cables from the workstation’s power supply are properly
plugged in to the backplane board (riser card).

A PCI or ISA card that has been installed is not seated
properly or is defective. Make sure that the card is fully
inserted, or remove the PCI or ISA card that was just
installed.

The real-time clock (RTC) battery may need to be replaced.

fan for function and blockage.

Printer Problems

This section identifies some quick checks for printer-related problems.

Problem Possible Solution

Printer will not print. 1. Printer is not turned on and online. Turn the printer on and

Printer will not turn on. The cables may not be connected properly. Reconnect all

Prints garbled information. 1. The correct printer drivers for the application are not

Printer is off line. The printer may be out of paper. Check the paper tray and

Table 4-3

Solutions for Printer Problems

make sure it is online.

2. The correct printer drivers for the application are not
installed. Install the correct printer drivers for the
application.

3. If the workstation is on a network, you may not have made
the connection to the printer. Make the proper network
connections to the printer.

cables and check the power cord and grounded AC outlet.

installed. Install the correct printer driver for the application.

2. The cables may not be connected properly. Reconnect all
cables.

refill it if it is empty. Select online.

Diskette Drive Problems

This section identifies some quick checks for diskette drive-related problems.

Problem Possible Solution

Diskette drive light stays on. 1. Diskette might be damaged. Use a different diskette.

Diskette drive cannot write to a diskette. 1.Diskette is not formatted. Format the diskette.

Diskette drive cannot read a diskette. 1. Diskette is not formatted. Format the diskette.

A problem has occurred with a disk transaction. The directory structure is bad or there is a problem with a

Non-system disk message. Remove the diskette from the drive.
Drive not found. Check the cables for loose connections.

4-7

Table 4-4

Solutions for Diskette Drive Problems

2. Diskette could be installed incorrectly. Remove the diskette
and reinsert.

3. Software program may be damaged. Check the program
diskettes.

4. Drive button is not pushed in. Push in drive button.

5. Drive cable is not properly connected. Reconnect drive
cable.

2. Diskette is write-protected. Either use another diskette that
is not write-protected or disable the write protection on the
diskette.

3. Writing to the wrong drive. Check the drive letter in the path
statement.

4. Not enough space is left on the diskette. Use another
diskette to write the information.

5. Diskette write control is disabled. Check the security feature
settings.

2. Using the wrong diskette type for the drive type. Use a
diskette that is compatible with the drive.

3. Reading the wrong drive. Check the drive letter in the path
statement.

4. Diskette drive has been disabled by Computer Setup
Windows NT Workstation utilities. Run Computer Setup and
enable the diskette drive.

file.

Compaq Professional Workstation AP400 Maintenance and Service Guide

4-8 Diagnostic Tools

Display Problems

This section identifies some quick checks for display-related problems.

Problem Possible Solution

Screen is blank. 1.Monitor is not turned on and the monitor light is not on. Turn

Graphics colors are wrong. 1. If the BNC cable is used, make sure that the Red, Green,

Characters are dim. 1. Adjust the monitor’s brightness and contrast controls.

Monitor does not function properly when used with the
energy saver features.

Blurry display or requested resolution cannot be set. If the graphics controller was upgraded, the correct display

Table 4-5

Solutions for Display Problems

on the monitor and check that the monitor light is on.

2. Screen save has been initiated. Press any key or move the
mouse to light the screen. Wait a few seconds for the
screen to be active.

3. Check the cable connection from the monitor to the
workstation and check the grounded AC outlet.

4. The brightness needs adjusting. Adjust the brightness
control.

5. The QuickBlank feature has been enabled through Security
Management. Run Computer Setup and disable the
QuickBlank feature.

6. The energy saver feature has been enabled. Press any key
or type the password. Wait a few seconds for the screen to
become active.

7. The RGB (Red, Green, Blue) input switch on the back of the
monitor is incorrectly set. Set the monitor’s input switch to
75 ohms. If there is a sync switch, set it to External.

8. If a fixed-sync monitor is used, be sure that the monitor can
accept the same sweep rate as the resolution chosen.

9. Check that the graphics adapter is fully and properly
inserted in the PCI or AGP slot.

and Blue BNC cables are connected to the corresponding
monitor connectors.

2. Be sure the monitor’s RGB inputs are set to 75 ohms.

2. Check that the video cable is securely connected to the
video card and monitor.

3. Set the RGB switch (and sync options, if available) to 75
ohms, with the sync set to External. Refer to the
documentation included with the monitor.

A monitor without the energy saver feature is being used
with energy saver features enabled. Disable the monitor
energy saver feature.

drivers may not be loaded. Install the correct display
drivers included in the option kit.

Continued

4-9

Solutions for Display Problems

Problem Possible Solution

The picture rolls, jitters, or blinks. 1. Be sure the monitor cable is securely connected to the

Screen goes blank. A screen blanking utility may be installed or energy saver

Monitor overheats. There is not enough ventilation space for proper airflow.

Cursor will not move using the arrow keys on the
numeric keypad.

Hardware Installation Problems

This section identifies some quick checks for hardware problems.

Continued

computer.

2. In a 2-monitor system or if another monitor is in close
proximity, the monitors may interfere with each other’s
magnetic field. Move them farther apart.

features are enabled. Press any key or type password. Wait
a few seconds for the screen to become active.

Leave at least 3 inches (7.6 cm) of ventilation space. Also,
be sure there is nothing on top of the monitor to obstruct
air flow.

The Num Lock key is on. Press the Num Lock key. The
Num Lock light should not be on when you want to use the
arrow keys.

Table 4-6

Solutions for Hardware Installation Problems

Problem Possible Solutions

A new device is not recognized as part of the computer
system.

1. The Computer Setup utility has not been run to configure the
new device. Run the Computer Setup utility.

2. When the system advised you of changes to the
configuration, you did not accept them. Reboot the
workstation and follow the instructions for accepting the
changes.

3. The system may not have automatically recognized the new
device. Run Computer Setup and identify the new device.

4. A Plug-and-Play board may not automatically configure
when added if the default configuration conflicts with other
devices. Use Computer Setup to deselect the automatic
settings for the board and choose a basic configuration that

doesn’t cause a resource conflict.

5. The cables for the new external device are loose or the
power cables are unplugged. Check all cables.

6. The power switch for the new external device is not turned
on. Turn off the workstation, turn on the external device,
and then turn on the workstation to integrate the new
device.

7. If the drive is a secondary drive that has just been installed
on the same controller as the primary drive, verify that the
jumpers for both drives are set correctly.

Compaq Professional Workstation AP400 Maintenance and Service Guide

4-10 Diagnostic Tools

Hard Drive Problems

This section identifies some quick checks for hard drive-related problems.
The information provided by the diagnostics test includes error code, system serial number, drive

serial number, drive model, and drive firm ware revision. Specific details of the drive failure are
not included.

When you run the diagnostics, the test results a re stored in a log. After completing the test, you
can print this log to a local printer or save it to a file. Alternatively, before running the test, you
can configure the test options to send the results to a local printer or file.

Solutions for some typical hard drive problems are presented in the following table.

Problem Possible Solution

Hard drive error occurs. Hard disk has bad sectors or has failed. Use a utility to

Disk transaction problem. Either the directory structure is bad or there is a problem with

Drive not found. 1.Cable could be loose. Check cable connections.

Nonsystem disk message. 1. The system is trying to start from a diskette that is not

Table 4-7

Solutions for Hard Drive Problems

locate and block usage of bad sectors. If necessary,
reformat the hard disk.

a file.
When using Windows NT Workstation, run Disk

Administrator. At the Start menu, highlight Programs and
select Administrator Tools.

2. Check SCSI IDs to make sure they are not duplicated.

bootable. Remove the diskette from the diskette drive.

2. The system is trying to start from the hard drive but the hard
disk has been damaged. Insert a bootable diskette into the
diskette drive and restart the workstation.

3. Diskette boot has been disabled in Computer Setup. Run
Computer Setup and enable diskette boot.

CD-ROM and DVD-ROM Drive (IDE) Problems

This section identifies some quick checks for IDE CD-ROM and DVD-ROM drive-related
problems.

Solutions for CD-ROM and DVD-ROM Drive (IDE) Problems

Problem Possible Solution

Cannot read compact disc. 1. CD is not properly seated in the drive. Eject the CD, correctly

System will not boot from drive. 1. The CD-ROM boot is not enabled through the Computer

Cannot eject compact disc. Disc is not properly seated in the drive. Turn off the

Device is not detected; driver is not loaded. Drive is not connected properly. Open the workstation.

4-11

Table 4-8

seat it in the drive, then reload.

2. If the computer is towered, the CD-ROM clamps must be
used. Eject the CD, extend clamps and slide the CD in at a
slight angle.

3. CD has been loaded upside down. Eject the CD, turn it over,
then reload.

Setup utility. Run the Computer Setup utility and set the
drive priorities.

2. Make sure that drive cabling and jumpers are set correctly.

workstation, insert a thin metal rod into the emergency
eject hole, and push firmly (a straightened paper clip can
be used). Slowly pull the tray out from the drive until the
tray is fully extended, then remove the CD.

Check to see that the drive cable is connected properly.

Memory Problems

This section identifies some quick checks for memory-related problems.

Problem Possible Solution

Out of Memory error. 1. Run Performance Monitor. At the Start menu, highlight

Memory count during POST is wrong. The DIMMs may not be installed correctly. Check that the

Insufficient memory error during operation. The system has run out of memory for the application. Check

Table 4-9

Solutions for Memory Problems

Programs and select Administrator Tools.

2. The workstation has run out of memory to run the
application. Check the application documentation to
determine the memory requirements.

DIMMs have been installed correctly in the DIMM sockets
then run the Computer Setup utility.

the memory requirements for the application or install
additional memory.

Compaq Professional Workstation AP400 Maintenance and Service Guide

4-12 Diagnostic Tools

SCSI Problems

Some common causes and solutions f or SCSI device problems are listed in the following table.

Problem Cause Solution

System will not boot
from a SCSI drive.

Network Problems

This section provides some comm on causes and solutions for network problems. The process of
debugging network cabling is not discussed.

Table 4-10

Solutions for SCSI Problems

The SCSI drive is not configured
correctly.

Table 4-11

Solutions for Network Problems

Make sure that drive cabling and jumpers are set
correctly. To boot a SCSI drive, the drive ID
number must be set to 0.

Problem Cause Solution

System does not detect
a network controller.

Diagnostics reports a
failure.

Diagnostics passes, but
the system does not
communicate with the
network.

1. Possible driver problem

2. Possible failed network
controller

1. The cable is not securely
connected.

2. The cable is attached to the
incorrect connector.

3. There is a problem with the
cable or a device at the other
end of the cable.

4. The network controller is
defective.

5. Network controller interrupt or
memory overlaps the interrupt
or memory of an expansion
board.

1. Network drivers are not
loaded, or driver parameters
do not match current
configuration.

2. The network controller is not
configured for the
workstation.

3. The network controller
interrupt or memory overlaps
the interrupt or memory of an
expansion board.

1. Load latest version of Compaq Workstation Support
Software for Microsoft Windows NT.

2. Replace system board with tray.

1. Be sure the cable is securely attached to the network
connector and that the other end of the cable is securely
attached to the correct device.

2. Be sure that the cable is attached to the correct
connector.

3. Be sure that the cable and device at the other end are
operating correctly.

4. Replace the controller or the system board with tray.

5. Run Computer Setup and modify the network controller
memory value.

1. Make sure the network drivers are loaded and that the
driver parameters match the configuration of the network
controller.

2. Select the Network icon at the Control Panel.
Reconfigure the driver if necessary, using the Network

Setup found in the Control Center.

3. Run Computer Setup and modify the network controller
memory value.

Continued

4-13

Solutions for Network Problems

Problem Cause Solution

Network controller
stopped working when
an expansion board was
installed.

System Setup utility
reports unprogrammed
EPROM.

Network controller
stopped working
without apparent cause.

1. Network drivers are not

2. The cable is not securely

3. The network controller

4. The network controller

5. The files containing the

1. The network controller is

2. Network drivers are not

1. The files containing the

2. The cable is not securely

3. The network controller is

Continued

loaded or driver parameters
do not match the current
configuration.

connected.

interrupt or memory overlaps
the interrupt or memory of
another expansion board.

requires drivers.

network drivers are corrupted.

defective.

loaded.

network drivers are corrupted.

connected.

defective.

1. Make sure that the network drivers are loaded and that
the driver parameters match the configuration of the
network controller using Network Setup found in the
Control Center.

2. Be sure that the cable is securely attached to the network
connector and that the other end of the cable is securely
attached to the correct device.

3. Run Computer Setup and modify the network controller
memory value.

4. Verify that the drivers were not accidentally deleted when
the drivers for a new expansion board were installed.

5. Reinstall the network drivers using SmartStart for
Workstations CD and then run Computer Setup.

1. Replace the controller or the system board with tray.

2. Boot the workstation without the network drivers using a
system boot diskette, and reconfigure the network
controller.

1. Reinstall the network drivers using SmartStart for
Workstations CD, then run Computer Setup.

2. Make sure that the cable is securely attached to the
network connector and that the other end of the cable is
securely attached to the correct device.

3. Replace the network controller or system board with tray.

Audio Hardware Conflicts

This section provides solutions to hardware conflicts. Hardware c onflicts occur when two or
more peripheral devices contend for the same signal lines or channels. Conflicts betwee n the
audio interface and another peripheral device may be due to the settings of the base I/O
addresses, interrupts, or DMA channels. The audio interface typically has the following settings:

■ Base I/O address 220H

■ OPL III I/O address 388-38Bh

■ Interrupt IRQ 5

■ 8-bit DMA Channel 1 and Channel 0 or 3

To resolve hardware conflicts:

1. Change the hardwa re settings of the audio card or the peripheral card in your system if the

peripheral card is using the audio interface setting.

2. If you are unsure of the settings of the peri pheral cards, you can isola t e the source of the

problem by temporarily r emoving all cards. After that, add the cards back one at a time
until the card that is causing the conflict is found.

Compaq Professional Workstation AP400 Maintenance and Service Guide

4-14 Diagnostic Tools

Compaq Setup and Diagnostics Utilities

The Compaq Setup and Diagnostics utilities are loca ted on the system partition, not in the ROM.
The utilities include:

■ Computer Setup

■ Computer Checkup (TES T)

■ View System Information (INSPECT)

■ Create a Diagnostics Diskette

■ Manage Diagnostics Partition

Explanations and procedures for each utility are included later in this chapter.
The Setup and Diagnostics utilities should be run in the f ollowing instances:

■ When a system configuration er ror is detected during the Power-On Self-Test (POST).

■ To change the factory default settings for some of the workstation features.

■ To change the system configuration, which is sometimes necessa ry upon adding or

removing optional hardware.

■ To set system configuration fe atures.

NOTE: The partition containing these utilities can be recreated from the SmartStart for
Workstations CD or from the Computer Setup or Diagnostic diskettes. Additional utilities are in
Windows NT Workstation under Administrative Tools and Control Panel.

Accessing the Compaq Setup and Diagnostics Utilities
Menu

If the system was preinstalled or installed using SmartStart for Workstations, the Compaq
Utilities will be available on the system partition. (The system partition can also be created
during a manual system installation. )

IMPORTANT: Do not attempt to access the Setup and Diagnostics utilities directly from the
SmartStart for Workstations CD. The utilities will not be functional. However, you CAN boot
your workstation from the SmartStart for Workstations CD and select the

from Compaq

To access the Compaq Utilities menu:

1. Turn on or resta rt the workstation.

NOTE: Do not restart your workstation while in Windows NT Workstation. Instead, exit Windows
NT Workstation by clicking

option, which accesses the Computer Setup Utility from the system partition.

Start, Shut Down, Restart the computer.

Run Computer Setup

2. When you see the words “F10=Setup” in the bottom-right corner of the screen, press

F10. You have approximately two seconds to press F10 or you must restart the

workstation.

3. Select the desired language when prompted. Then press Enter to bypa ss the title and
welcome screens. The Compaq Utilities menu appears.

Computer Setup

The Computer Setup utility is preinstalled on the system partition. This utility is also available
on diskettes through SoftPaq, or by creating diskettes from the system pa rtition. Computer Setup
provides a snapshot of the workstation har dw are configuration, aids in troubleshooting, and
allows you to customize workstation features. Computer Setup re cognizes a newly installed
internal or external device and automatically updates the Computer Setup screen.

The following parameters are checked:

■ Installed devices

■ Memory status

■ Password status

■ Interface configurations

4-15

■ Graphics configuration

■ Computer serial num ber

■ Controller status

■ Power Managem ent

To run Computer Setup, follow thes e steps:

1. Access the Compaq Utilities menu by restarting your workstation and pressing F10 when
you see the words “F10=Setup” in the bottom-right corner of the screen. Select the
desired language when prompted. Then press Enter to bypa ss the title and welcome
screens.

2. Select Computer Setup from the Compaq Utilities menu, then press Enter.

3. Select the desired configur ation settings, then save and exit.

Computer Checkup (TEST)

Computer Checkup (TEST), the primary diagnostics utility, confirms whether the var i ous
workstation devices are recognized by the system and a re functioning properly. U s e the TEST
utility to help set up tests, to test the workstation, and to install the operating system. The TEST
menu offers the following:

■ Quick Check Diagnostics runs a quick, general test on each device with a minimal

number of prompts. If errors occur, they are displayed when the test is complete.

■ Automatic Diagnostics runs unattended and provides maximum testing of each device

with minimal prompts. You c an choose how many times to run the tests, to stop on errors,
or to print or file an error log.

Compaq Professional Workstation AP400 Maintenance and Service Guide

4-16 Diagnostic Tools

■ Prompted Diagnostics allows maximum control over the devic e testing process. You can

choose attended or unattended testing, stop on errors, or print or file an error log.

The TEST option, which may vary by product, checks the following:

■ CPU (main system)

■ Keyboard

■ Pointing device interface

■ Parallel interfaces

■ Graphic controllers

■ Diskette drives

■ Fixed disks

■ Serial interfaces

■ Installed Compaq devices (tape drive, SCSI device, or netw ork status)

To run TEST:

1. Turn on only the external devices tha t you w i sh to test. You may wish to leave the printer
connected to log error me ssages.

2. Access the Compaq Utilities menu by restarting your workstation and pressing F10 when
you see the words “F10=Setup” in the bottom-right corner of the screen. Select the
desired language when prompted. Then press Enter to bypa ss the title and welcome
screens.

3. To display the TEST options menu, se lect Computer Checkup (TEST) from the Compaq
Utilities menu, then press Enter.

4. Select the option to view the device list. After a few minutes, a list of installed hardware
devices is displayed.

5. Verify that the TEST utility correctly detected the devices installed. If the list is correct,
select OK. The test option menu is displayed again. If the list is incorrect, be sure that any
new devices are installed properly.

NOTE: This utility may not detect non-Compaq devices.

6. Select one of the following from the test option menu:

■ Quick Check Diagnostics

■ Automatic Diagnostics

■ Prompted Diagnostics

CAUTION: If attended testing is selected, the test itself may result in data loss.

IMPORTANT: When you run the TEST utility, be sure to record any error message

numbers.

7. Follow the instructions on the screen as the diagnostic tests are run on the devices. When
the testing is complete, the test option menu is displayed again.

8. Exit to the Compaq Utilities menu.

View System Information (INSPECT)

The View System Information (INSPECT) utility provides information about the system once it
has been configured, including:

■ System

■ Contents of the operating system star tup files

■ System ROM

■ System storage

■ System ports

■ Current memory configuration

■ ROM version

■ Type of processor and coprocessor

4-17

■ Diskette, CD-ROM, DVD-ROM, and hard drives

■ Active printer and communications interfaces

■ Modem

■ Keyboard

■ Graphics

■ Windows files

■ Network status

■ Miscellaneous

To run INSPECT, follow these steps:

1. Access the Compaq Utilities menu by restarting your workstation and pressing F10 when
you see the words “F10=Setup” in the bottom-right corner of the screen. Select the
desired language when prompted. Then press Enter to bypa ss the title and welcome
screens.

2. Select the View System Information ( INSPECT) from Compaq Utilities menu, then press

Enter.

Create a Diagnostics Diskette

This option allows you to create both Setup or Di agnostics diskettes from the diagnostics
partition. To create the diskettes:

1. Turn on or resta rt the workstation. If Windows NT Wor kstation is running, click Start,

Shut Down, Restart the computer.

Compaq Professional Workstation AP400 Maintenance and Service Guide

4-18 Diagnostic Tools

Immediately after the workstation completes Power-On Self-Test (POST), which is

indicated on the screen by the memory check, the cursor moves to the upper-right corner
of the screen.

2. Press F10 as soon as you see the words “F10=Set up” in the bottom-right corner of the
screen.

3. If prompted, select the desired language.

4. Press Enter to bypass the Welcome to Compa q Utilities sc reen.

5. From the Compaq Utilities menu, select Create a Diagnostics Diskette, then press Enter.
One diagnostic and two setup diskettes will be create d.

NOTE: The Dia gnostics and Setup diskettes can also be cre ated by downloading the latest
version from the Compaq website at www.compaq.com.

Manage a Diagnostics Partition

This option allows you to create, delete, or upgrade the diagnostics soft w are on the workstation.
This must be performed from a diagnostics diskette.

CAUTION: Creating a diagnostics partition involves performing a low-level
format on the hard drive. Normally, this is only done to add diagnostics to a
new replacement hard drive. If the diagnostics software is deleted, you will no
longer be able to access the Compaq Utilities menu.

Diagnostic Error Codes

Diagnostic error codes occur if the system recognize s a problem while running the Compaq
Setup and Diagnostics utilities. These er ror codes help identify possibly defective subassemblies.

Tables 4-12 through 4-24 list possible error codes, descriptions of each error condition, and
actions required to resolve the error condition. For assistance in the removal and replacement of
a particular subassembly, see Chapter 3.

NOTE: Retest the system after completing each step. If the problem has been resolved, do not
proceed with the remaining steps.

If you encounter an error condition, complete the following steps before starting problem
isolation procedures:

1. Ensure proper ventilation. The workstation should have a 6-inc h (15-cm) clearanc e at the
rear of the chassis.

2. Turn off the workstation and peripheral devices.

CAUTION: Always make sure that the power is off before disconnecting or
reconnecting the mouse, keyboard, or any other peripheral devices. Disconnecting
or connecting any peripheral devices while the unit power is on can damage the
system board with tray.

3. Disconnect any periphe ral devices other than the monitor and keyboard. Do not
disconnect the printer if you wa nt to test it or use it to log error message s.

4. Delete the Power-on Password, if set.

4-19

Memory

5. If a key icon (

) appears on the screen when POST completes, the Power-on Password
is set. If this occurs, you must e nte r the password to continue. To delete the password,
type the current password, then press Enter. If you do not have access to the password,
you must disable it through the SW1-S2 switch on the system board with tray.

6. Install loop-back and terminating plugs for c omplete testing.

7. Run the Diagnostics diskette.

Table 4-12

Memory Test Error Codes

Error Code Description Recommended Action

200-xx Memory machine ID test failed. Reinsert DIMM in correct location.
202-xx Memory system ROM checksum failed. The following steps apply to error codes 202-xx

203-xx Memory write/read test failed. 1. Remove one pair of DIMM at a time until the error

204-xx Memory address test failed. 2. Replace other removed DIMMs one pair at a time, testing

211-xx Random pattern test failed. 3. Replace the system board with tray and retest.
214-xx Noise test failed.
215-xx Random address test failed.

through 215-xx:

message stops.

each to ensure the error does not return.

Keyboard

Table 4-13

Keyboard Test Error Codes

Error Code Description Recommended Action

300-xx Keyboard ID test failed. The following steps apply to error codes 300-xx through

304-xx:

301-xx Keyboard self-test/interface test failed. 1.Check the keyboard connection. If disconnected, turn the

computer off and connect the keyboard.
302-xx Individual key test failed. 2.Replace the keyboard and retest.
304-xx Keyboard repeat test failed. 3.Replace the system board with tray and retest.

Compaq Professional Workstation AP400 Maintenance and Service Guide

4-20 Diagnostic Tools

Microprocessor

Error Code Description Recommended Action

101-xx CPU test failed. Replace the system board with tray and

102-xx Coprocessor error. 1. Run Computer Checkup or Computer Setup

103-xx DMA controller failed. Replace the system board with tray and

104-xx Interrupt controller failed. Replace the system board with tray and

105-xx Port error. Replace the system board with tray and

106-xx Keyboard controller self-test failed. Replace the system board with tray and

107-xx CMOS RAM test failed. The following steps apply to error codes

108-xx CMOS interrupt test failed. 1. Replace the battery/clock module and retest.
109-xx CMOS clock test failed. 2. Replace the system board with tray and

110-xx Programmable timer test failed. Replace the system board with tray and

113-01 Protected mode test failed. Replace the system board with tray and

114-01 Speaker test failed. 1. Verify the speaker connection.

199-xx Installed devices test failed. 1. Check system configuration.

Table 4-14

Microprocessor Test Error Codes

retest.

and retest.

2. Replace the processor and retest.

retest.

retest.

retest.

retest.

107-xx through 109-xx:

retest.

retest.

retest.

2. Replace the system board with tray and
retest.

2. Verify cable connections.

3. Check switch settings.

4. Run the Setup and Diagnostics utility.

5. Replace the system board with tray and
retest.

Printer

Error Code Description Recommended Action

401-xx Printer failed or not connected. The following steps apply to 401-xx through

402-xx Printer port test failed. 2.Check power to the printer.
403-xx Printer pattern test failed. 3.Install the loop-back connector and retest.

Diskette Drive

Error Code Description Recommended Action

600-xx Diskette ID drive types test failed. The following steps apply to error codes 600-xx

601-xx Diskette format failed. 1. Replace the diskette media and retest.
602-xx Diskette read test failed. 2.Check and/or replace the diskette power and signal

603-xx Diskette write, read, compare test failed. 3.Replace the diskette drive and retest.
604-xx Diskette random seek test failed. 4.Replace the system board with tray and retest.
605-xx Diskette ID media test failed.

4-21

Table 4-15

Parallel Printer Test Error Codes

403-xx:

1. Connect the printer.

4.Replace system board with tray and retest.

Table 4-16

Diskette Drive Test Error Codes

through 698-xx:

cables and retest.

606-xx Diskette speed test failed.

609-xx Diskette reset controller failed.

610-xx Diskette change line test failed.

697-xx Diskette type error.

698-xx Diskette drive speed not within limits.
699-xx Diskette drive/media error. 1. Replace media.

2.Run Computer Setup and Computer Checkup.

Compaq Professional Workstation AP400 Maintenance and Service Guide

4-22 Diagnostic Tools

Serial Port

Error Code Description Recommended Action

1101-xx Serial port test failed. 1.Run Computer Setup or Windows NT utilities.

Modem

Error Code Description Recommended Action

1201-xx Modem internal test failed. The following steps apply to error codes 1201-xx

1202-xx Modem time-out test failed. 1.Disconnect from the phone line and retest.
1203-xx Modem external termination test failed. 2.Check the phone number.
1204-xx Modem auto originate test failed. 3. Check the modem line.
1205-xx Modem auto answer test failed. 4.Replace the modem and retest.
1210-xx Modem direct connect test failed.

Table 4-17

Serial Test Error Codes

2.Replace the system board with tray and retest.

Table 4-18

Modem Communications Test Error Codes

through 1210-xx:

Pointing Device

Error Code Description Recommended Action

8601-xx Mouse test failed. The following steps apply for 8601-xx and 8602-xx

8602-xx Interface test failed. 1. Replace with a working pointing device and retest.

Table 4-19

Pointing Device Test Error Codes

error codes:

2. Replace the system board with tray and retest.

CD-ROM or DVD-ROM Drive (IDE)

CD-ROM and DVD-ROM Drive (IDE) Test Error Codes

Error Code Description Recommended Action

3301-xx Drive read test failed. The following steps apply to error codes error codes

3305-xx Drive seek test failed. 1. Replace the CD media and retest.
6600-xx ID test failed. 2. Check the jumper settings on the drive.
6600-xx ID test failed. 3. Verify that the speaker is connected.
6605-xx Read test failed. 4. Check and/or replace the power and signal cables and

6608-xx Controller test failed. 5. Replace the drive and retest.
6623-xx Random read test failed.

Tape Drive

4-23

Table 4-20

3301-xx through 3305-xx and 6600-xx through
6623-xx:

retest.

Audio

Table 4-21

Tape Drive Test Error Codes

Error Code Description Recommended Action

1900-xx Tape drive ID test failed. The following steps apply to error codes 1900-xx

1901-xx Tape drive servo test failed. 1. Replace the tape cartridge and retest.
1902-xx Tape drive format or format verification test

failed.
1903-xx Tape drive sensor test failed. 3. Check and/or replace the signal cable and retest.
1904-xx Tape drive BOT/EOT test failed. 4. Replace the tape drive and retest.
1905-xx Tape drive read test failed. 5. Replace the system board with tray and retest.
1906-xx Tape drive write/read/compare failed.

through 1906-xx:

2. Check the switch settings and terminations on the tape
drive.

Table 4-22

Audio Test Error Codes

Error Code Description Recommended Action

3206-xx Audio System Internal Error. Replace the system board with tray and retest.

Compaq Professional Workstation AP400 Maintenance and Service Guide

4-24 Diagnostic Tools

Video

Error Code Description Recommended Action

501-xx Graphics controller test failed. The following error codes apply to error codes 501-xx

502-xx
503-xx Video attribute test failed.
504-xx Video character set test failed.
505-xx Video 80 × 25 mode 9 × 14 character cell

506-xx Video 80 × 25 mode 8 × 8 character cell test

507-xx Video 40 × 25 mode test failed.
508-xx Video 320 × 200 mode color set 0 test failed.
509-xx Video 320 × 200 mode color set 1 test failed.
510-xx Video 640 × 200 mode test failed.
511-xx Video screen memory page test failed.
512-xx Video gray scale test failed.
514-xx Video white screen test failed.
516-xx Video noise pattern test failed.
2402-xx Video memory test failed. The following steps apply to error codes 2402-xx

2403-xx Video attribute test failed.
2404-xx Video character set test failed.
2405-xx Video 80 × 25 mode 9 × 14 character cell

2406-xx Video 80 × 25 mode 8 × 8 character cell test

2408-xx Video 320 × 200 mode color set 0 test failed.
2409-xx Video 320 × 200 mode color set 1 test failed.
2411-xx Video screen memory page test failed.
2412-xx Video gray scale test failed.
2414-xx Video white screen test failed.
2416-xx Video noise pattern test failed.
2418-xx ECG/VGC memory test failed.
2419-xx ECG/VGC ROM checksum test failed.
2421-xx ECG/VGC 640 × 200 graphics mode test

2422-xx ECG/VGC 640 × 350 16 color set test failed.
2423-xx ECG/VGC 640 × 350 64 color set test failed.
2410-xx Video 640 × 200 mode test failed.

Table 4-23

Video Test Error Codes

through 516-xx:

Video memory test failed. 1. Replace the monitor and retest.

2. Replace the graphics controller.

test failed.

failed.

through 2456-xx:

1.Run the Setup and Diagnostics utilities.

2.Replace the monitor and retest.

3.Replace the graphics controller and retest.

test failed.

failed.

failed.

Continued

4-25

Video Test Error Codes

Error Code Description Recommended Action

2424-xx ECG/VGC monochrome text mode test failed. The following steps apply to error codes 2402-xx

2425-xx ECG/VGC monochrome graphics mode test

2431-xx 640 × 480 graphics test failure. 3. Replace the graphics controller and retest.

2432-xx 320 × 200 graphics (256 color mode) test

2448-xx Advanced VGA Controller test failed.
2451-xx 132-column Advanced VGA test failed.
2456-xx Advanced VGA 256 Color test failed.
2458-xx Advanced VGA Bit BLT test. The following steps apply to error codes 2458-xx

2468-xx Advanced VGA DAC test. 1.Replace the graphics controller and retest.
2477-xx Advanced VGA data path test. 2.Replace the system board with tray and retest.
2478-xx Advanced VGA Bit BLT test.
2480-xx Advanced VGA Linedraw test.

Network Interface

failed.

failure.

Continued

through 2456-xx:

1.Run the Setup and Diagnostics utilities.

2.Replace the monitor and retest.

through 2480-xx:

Table 4-24

Network Interface Test Error Co des

Error Code Description Recommended Action

6000-xx Network ID test failed. The following steps apply to error codes 6000-xx

6014-xx Network configuration test failed. 1.Turn the workstation off then on (cold boot) and run

6016-xx Network reset test failed. 2.Verify test procedures.

6028-xx Network internal test failed. 3. Replace the network board, if installed.

6029-xx Network external test failed. 4.Replace the system board with tray.

6054-xx Network configuration test failed.
6056-xx Network reset test failed.
6068-xx Network internal test failed.
6069-xx Network external test failed.
6089-xx Network open test failed.

through 6089-xx:

Computer Setup or Windows NT utilities.

Compaq Professional Workstation AP400 Maintenance and Service Guide

4-26 Diagnostic Tools

SCSI Error Codes

This section includes the error codes for the following SCSI devices :

■ Hard drives

■ CD-ROM and DVD-ROM drives

■ Tape drives

The SCSI error codes are written in the format AABB- CC and can be determined by looking up
the respective parts of the code in the three cor responding tables numbered 4-25, 4-26, and 4-27.

■ AA (Table 4-25) identifies the drive type being tested.

■ BB (Table 4-26) identifies the type of test.

■ CC (Table 4-27) identifies the exact error received.

For example, if you received a diagnostic error code of 6523-05, you would look at:

■ Table 4-25 to identify the meaning of the first two numbers, 65. This indicates a hard

drive problem.

■ Table 4-26 to identify the meaning of the second two numbers, 23. T his refers to a

random read.

■ Table 4-27 to identify the last two numbers, 05. This indicates a see k failure.

When you combine this information, you know tha t the diagnostics program was testing the
random-read functioning of the hard drive and received a seek failure. The device is faulty and
must be replaced.

Table 4-25

SCSI Device Names

65XX-XX Hard Drive
66XX-XX CD-ROM or DVD-ROM Drive
67XX-XX Tape Drive

Table 4-26

SCSI Test Names

XX00-XX ID
XX05-XX Read
XX06-XX SA/Media
XX23-XX Random Read
XX28-XX Media load/unload

4-27

Table 4-27

SCSI Test Error Codes

Error Code Description Recommended Action

XXXX-02 Drive not installed. Check cable connections.
XXXX-03 Media not in drive. Check for and install DATA CD or write-enabled

XXXX-05 Seek failure. Replace the indicated device.
XXXX-06 Drive timed out. Replace the indicated device.
XXXX-07 Drive busy. Replace the indicated device.
XXXX-08 Drive already reserved. Replace the indicated device.
XXXX-09 Unknown.
XXXX-10 Unknown.
XXXX-11 Media soft error. Replace the indicated device.
XXXX-12 Drive not ready. Replace the indicated device.
XXXX-13 Media error. Replace the indicated device.
XXXX-14 Drive hardware error. Replace the indicated device.
XXXX-15 Illegal drive command. Replace the indicated device.
XXXX-16 Media was changed. Replace the indicated device.
XXXX-17 Tape write-protected. 1. Disable write-protect on tape cartridge.

XXXX-18 No data detected. Replace the indicated device.
XXXX-21 Drive command aborted. Replace the indicated device.
65XX-24 Media hard error. 1. Back up data and perform Surface Analysis to

66XX-24 Media hard error. 1. Replace current DATA CD with different DATA

67XX-24 Media hard error. 1. Ensure correct media type for this tape drive.

XXXX-25 Unknown.
XXXX-30 Controller timed out. Replace the indicated device.
XXXX-31 Unrecoverable error. Replace the indicated device.
XXXX-32 Controller/drive disconnected. Replace the indicated device.
XXXX-33 Illegal controller command. Replace the indicated device.
XXXX-34 Invalid SCSI bus phase. Replace the indicated device.
XXXX-35 Invalid SCSI bus phase. Replace the indicated device.
XXXX-36 Invalid SCSI bus phase. Replace the indicated device.
XXXX-39 Error status from drive. Replace the indicated device.

tape in drive.

2. Replace tape drive.

reallocate defect.

2. Replace drive.

CD.

2. Replace drive.

2. Replace current tape with new tape.

3. Replace tape drive.

Continued

Compaq Professional Workstation AP400 Maintenance and Service Guide

4-28 Diagnostic Tools

SCSI Test Error Codes

Error Code Description Recommended Action

XXXX-40 Target timed out. Replace the indicated device.
XXXX-41 SCSI bus stayed busy. Replace the indicated device.
XXXX-42 ACK/REQ lines bad. Replace the indicated device.
XXXX-43 ACK did not deassert. Replace the indicated device.
XXXX-44 Parity error. Replace the indicated device.
XXXX-50 Data pins bad. Replace the indicated device.
XXXX-51 Data line 7 bad. Replace the indicated device.
XXXX-52 MSG, C/D, and/or I/O lines bad. Replace the indicated device.
XXXX-53 BSY never went busy. Replace the indicated device.
XXXX-54 BSY stayed busy. Replace the indicated device.
XXXX-60 Controller CONFIG-1 register bad. Replace the indicated device.
XXXX-61 Controller CONFIG-2 register bad. Replace the indicated device.
XXXX-65 Media not unloaded. Replace the indicated device.
XXXX-90 Fan failure. 1. Ensure fan(s) connected.

XXXX-91 Over Temperature. 1. Ensure proper air flow.

XXXX-99 Autoloader reported tapes not

loaded properly.

Continued

2. Replace nonfunctional fan(s).

2. Perform required maintenance and cleaning.

1. Install tape(s) in autoloader tape drive
according to test instructions.

2. Change autoloader magazine.

Upgrading the ROM

If the Compaq Professional Wor kstation AP400 does not have a Setup Password enable d, the
ROM is not write-protected a nd unauthorized updates can occur. If you need or want to upgrade
your system ROM, you can:

■ Order an upgraded ROMPa q diske tte from Compaq.

■ Order the Compaq Support Software CD Kit.

■ Download the latest ROMPaq images from the Compaq website (www.compaq.com).

IMPORTANT: To ensure maximum ROM protection, establish a Setup Password. A Setup
Password prevents unauthorized ROM upgrades.

Local ROM Flash

To upgrade the ROM:

1. Insert the ROMPaq diskette in the diskette drive and turn on the workstation.

CAUTION: To guard against unauthorized updates of the Flash ROM or the
System BIOS, the Setup Password must be set. See Chapter 5 for procedures on
establishing a Setup Password.