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.
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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
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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.
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❏ 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.
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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
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