Page 1
Addenda #1 and 2 to Compaq
Deskpro Workstation AP250
Maintenance & Service Guide
Compaq Deskpro Workstation AP250
Part number 118133-003
Spare part number 158269-001
The complete MSG follows this addendum.
This addendum contains changes to the original document.
2000 Compaq Computer Corporation. All rights reserved. Compaq is
registered in the U. S. Patent and Trademark Office. Product names
mentioned herein may be trademarks and/or registered trademarks of their
respective companies. Second Edition (August 2000).
158772-001 1
Page 2
Spare Part Numbers
Spare Part
Description
Intel Pentium III processor with heatsink (401405-003), clip
(120891-001), and baffle (118110-001).
600-MHz/133-MHz 158263-001 A
Intel Pentium III processor with heatsink (401405-003) and clip
(170524-001).
733-MHz/133-MHz 170527-001 A
867-MHz/133-MHz 180710-001 A
Intel Pentium III processor with heatsink (401405-003), clip
(170524-001), and baffle (212889-001).
1-GHz/133-MHz 216699-001 A
Memory Modules
RIMM 256-MB 171959-001 A
256-MB, 45 NS, RDRAM 161454-001 A
Graphics Controllers
Matrox G200 MMS 171975-001 A
Matrox MGA-G400A, AGP 2x/4x 163361-001 A
nVIDIA TNT2 PRO, 16-MB SGRAM 179997-001 A
ELSA Gloria II AGP, 64 MB 174641-001 A
Hard Drives
10-GB Ultra ATA Hard Drive (7200 RPM) 135364-001 A
20-GB Ultra ATA Hard Drive (7200 RPM) 180475-001 A
13.5-GB Ultra ATA Hard Drive (7200 RPM) 140515-001 A
30-GB Ultra ATA Hard Drive (7200 RPM) 180477-001 A
36.2-GB Wide-Ultra 160 Hard Drive 192197-001 A
Other Drives
48x CD-ROM Drive 187263-001 A
32x R-W CD-ROM Drive 173747-001 A
DVD-ROM Drive, 10x 215422-001 A
DVD-ROM Drive, 6x/32x, Opal 120417-001 A
DVD-ROM Drive, 10x/40x, Opal 161430-001 A
LS120 SuperDisk 209938-001 A
Number
Warranty
Tier
2 Addendum to MSG 118133-001
Page 3
Spare Part Numbers (continued)
Spare Part
Description
Miscellaneous Cable Kit
CD-ROM data, 12.5” (179048-001)
CD-ROM data, 12.5” (105876-001)
Diskette drive, 15.5” (179049-001)
CD-ROM audio, 12” (288489-001)
Thermal sensor (166785-001)
Hard drive/CD-ROM drive data, 14” (242947-001)
Hard drive data, 7” (247116-001)
Hard drive/CD-ROM drive data, 14.25” (242947-008)
Diskette drive data, 12” (247176-003)
Hard drive, CD-ROM drive data, 10” (247116-002)
Y-adapter, hard drive data (296563-001)
Miscellaneous Cable Kit
Diskette Drive, 11”(166838-001)
CD-ROM Audio, 21”(288489-002)
Hard drive data, IDE, 7” single device (247116-001)
Hard drive data, IDE, 14” single device (242947-001)
Diskette drive, twisted cable, 34” (356107-001)
Hard drive data, IDE, dual devices, 18” (108950-007)
Ultra SCSI-2 Cable, 4 device 402266-001* A
SCSI LVD Twisted Pair Cable 158277-001 A
Fan, 90mm 166922-001 A
Speaker 158267-001 A
Intel PRO/100+ Management Adapter NIC (10/100 Mb/s Auto-
sensing Ethernet controller) PCI card with Wake-On/Alert-On
LAN
NIC 10/100 PCI card with Wake-On/Alert-On LAN 118042-001 A
PCI SCSI Adapter 158364-001 A
Wide-Ultra2 SCSI Controller, PCI 330522-001* A
* These spare part numbers correct the listings in the original MSG.
Number
179182-001 A
166879-002 A
116188-001* A
Warranty
Tier
158772-001 3
Page 4
Specifications – Graphics Controllers
Matrox MGA-G400A Graphics Controller
Graphics
Memory Color palette*
64 K colors (16-bit) 2048 x 1536 1800 x 1440 1600 x 1200
16 MB
16 M colors (32-bit) 1600 x 1200 1280 x 1024 1280 x 1024
64 K colors (16-bit) 2048 x 1536 2048 x 1536 2048 x 1536
32 MB
16 M colors (32-bit) 2048 x 1536 2048 x 1536 1800 x 1440
* 3D acceleration is only available with a 16- or 32-bit color palette.
Matrox G200 Quad MMS Graphics Controller
Graphics
Memory Aspect Ratio Resolution Vertical Horizontal
32 MB 4:3/5:4 640 x 480
32 MB 16:9/16:10 856 x 480
without Z-buffering
Maximum display resolution
Double-buffering
800 x 600
1024 x 768
1152 x 864
1280 x 1024
1600 x 1200
1800 x 1440
1280 x 720
1600 x 1024
1920 x 1080
1920 x 1200
Double buffering
with 16-bit Z-
buffering
Refresh Rate/Display
60 - 200 Hz
60 - 200 Hz
30 - 140 Hz
60 - 120 Hz
60 - 100 Hz
60 - 90 Hz
60 - 70 Hz
60 – 200 Hz
60 – 100 Hz
60 - 100 Hz
60 - 80 Hz
60 - 76 Hz
Double buffering
with 32-bit Z-
buffering
31 – 102 kHz
38 – 114 Khz
48 - 113 kHz
54 - 110 kHz
64 - 107 kHz
75 - 13 kHz
89 - 1 04 kHz
30 – 108 kHz
44 – 76 kHz
64 – 108 kHz
70 – 94 kHz
75 – 95 kHz
continued
4 Addendum to MSG 118133-001
Page 5
Specifications – Graphics Controllers (c ontinued)
ELSA Gloria II AGP Graphics Controller
Graphics
Memory
64 MB 16.7M 640 x 480
* Refresh rate may function but may not be officially supported by Compaq.
Maximum Colors
Supported Resolution
800 x 600
1024 x 768
1152 x 864
1280 x 800
1280 x 960
1280 x 1024
1600 x 1000
1600 x 1000
1600 x 1200
1600 x 1280
1600 x 1280
1900 x 1080
1920 x 1080
1920 x 1200
1900 x 1200
2048 x 1536
Maximum Refresh
Rate
120 Hz
120 Hz
120 Hz
100 Hz
100 Hz
100 Hz
100 Hz
100 Hz*
85 Hz
85 Hz
85 Hz
75 Hz
85 Hz
75 Hz
85 Hz*
75 Hz
75 Hz
Memory Dedicated
to Texture Support
60 MB
58 Mb
54 MB
52 MB
52 MB
49 MB
48 MB
45 MB
45 MB
41 MB
40 MB
40 MB
39 MB
39 MB
37 MB
37 MB
27 MB
158772-001 5
Page 6
Air Baffle Assembly
6 Addendum to MSG 118133-001
Page 7
Compaq Deskpro Workstation AP250
Maintenance and Service Guide
Page 8
Deskpro Workstation AP250
Maintenance and Service Guide
First Edition (October 1999)
Part Number 118133-001
Spare Part Number 158269-001
Compaq Computer Corporation
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Page 9
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 protected by copyright. No part of this publication 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 described in this guide is furnished under a license agreement or nondisclosure agreement.
The software may be used or copied only in accordance with the terms of the agreement.
Compaq, Deskpro, Fastart, Compaq Insight Manager, Systempro, Systempro/LT, ProLiant, ROMPaq,
QVision, SmartStart, NetFlex, QuickFind, PaqFax, and ProSignia are registered with the United States
Patent and Trademark Office.
Neoserver, Netelligent, Systempro/XL, SoftPaq, QuickBlank, and QuickLock are trademarks and/or
service marks of Compaq Computer Corporation.
Microsoft, MS-DOS, Windows, and Windows NT are registered trademarks of Microsoft Corporation.
Pentium is a registered trademark and Xeon is a trademark of Intel Corporation.
Other product names mentioned herein may be trademarks and/or registered trademarks of their
respective companies.
Compaq Deskpro Workstation AP250
Maintenance and Service Guide
First Edition (October 1999)
Part Number 118133-001
Spare Part Number 158269-001
Writer: Bruce Sullivan Project: Compaq Deskpro Workstation AP250 Maintenance and Service Guide Comments:
Part Number: 118133-001 File Name: a-frnt.doc Last Saved On: 10/26/99 2:34 PM
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Page 10
Contents
About This Guide
Text Conventions ...................................................................................................... vii
Symbols in Text ....................................................................................................... viii
Symbols on Equipment ............................................................................................viii
Rack Stability............................................................................................................. ix
Getting Help................................................................................................................ x
Compaq Technical Support.................................................................................. x
Compaq Website.................................................................................................. x
Compaq Authorized Reseller.............................................................................. xi
Chapter 1
Illustrated Parts Catalog
Mechanical Parts ...................................................................................................... 1-2
System Components.................................................................................................1-3
Spare Parts List......................................................................................................... 1-4
Chapter 2
Service Preliminaries
Preliminary Warnings and Cautions......................................................................... 2-1
Electrostatic Discharge Information......................................................................... 2-2
Equipment Symbols .................................................................................................2-3
Tools and Software Requirements............................................................................2-3
Warranty Information............................................................................................... 2-4
Chapter 3
Removal and Replacement Procedures
Serial Number .......................................................................................................... 3-1
Service Preparations.................................................................................................3-2
Removing the Cable Lock........................................................................................3-3
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Page 11
iv Compaq Deskpro Workstation AP250 Maintenance and Service Guide
Removal and Replacement Procedures
continued
Removing the Side Access Panel .............................................................................3-4
Removing the Front Bezel........................................................................................3-5
Removing the Subpanel and Bezel Blank ................................................................3-6
Mass Storage Devices...............................................................................................3-7
Drive Positions..................................................................................................3-7
Removing a 3.5-inch Hard Drive....................................................................3-10
Removing a 3.5-inch Hard Drive with 5.25-inch Drive Adapter....................3-12
Removing a CD-ROM ....................................................................................3-16
Installing Optional SCSI Devices........................................................................... 3-19
Important Guidelines for Installing Optional SCSI Devices...........................3-19
Using the SCSI Cable......................................................................................3-20
Removing the Drivelock.........................................................................................3-21
Expansion Boards...................................................................................................3-24
Removing an Expansion Board.......................................................................3-25
Removing the Card Guide...................................................................................... 3-26
Installing Memory Modules ...................................................................................3-27
Important Guidelines for Direct RIMM Installation .......................................3-27
Installing RIMM Modules............................................................................... 3-27
Removing a Processor............................................................................................3-29
Removing a 733-MHz Processor from the Heatsink.......................................3-31
Removing the Processor Guide Rails..............................................................3-32
Removing the Speaker............................................................................................3-33
Removing the Power Supply.................................................................................. 3-34
Removing the Power Switch ..................................................................................3-36
Removing the System Board.................................................................................. 3-37
Removing the I/O Panel .........................................................................................3-38
Replacing the Lithium Battery ...............................................................................3-39
Converting a Minitower to a Desktop Configuration.............................................3-41
Converting a Desktop to a Minitower Configuration.............................................3-45
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Page 12
Chapter 4
Diagnostic Tools
Power-On Self-Test.................................................................................................. 4-2
POST Messages........................................................................................................ 4-3
Troubleshooting Minor Problems ..........................................................................4-10
Power Problems ..............................................................................................4-12
Diskette Drive Problems ................................................................................. 4-13
Display Problems............................................................................................ 4-14
Printer Problems..............................................................................................4-16
Hard Drive Problems.......................................................................................4-17
Hardware Installation Problems...................................................................... 4-18
DVD-ROM and CD-ROM Drive (IDE) Problems..........................................4-19
Memory Problems........................................................................................... 4-20
SCSI Problems................................................................................................ 4-20
Network Problems........................................................................................... 4-21
Audio Hardware Conflicts ..............................................................................4-24
Computer Setup and Diagnostics Utilities .............................................................4-25
Accessing the Computer Setup Menu.............................................................4-26
Diagnostics Utilities........................................................................................ 4-26
SCSI Error Codes...................................................................................................4-44
Upgrading the ROM...............................................................................................4-48
Local ROM Flash............................................................................................ 4-48
Remote ROM Flash.........................................................................................4-49
FailSafe Boot Block ROM.............................................................................. 4-49
Compaq Insight Manager.......................................................................................4-51
Compaq Workstation SSD for Windows NT.........................................................4-53
Compaq Diagnostics for Windows NT .................................................................. 4-54
Contents v
Chapter 5
System Security
Security Features......................................................................................................5-1
Setup Password .................................................................................................5-3
Windows NT Workstation Password................................................................5-5
National Keyboard Delimiter Characters.......................................................... 5-6
Advanced Security Management.............................................................................. 5-6
Reenabling Diskette Boot or Diskette Write.....................................................5-7
Reenabling a Serial Port or Parallel Port........................................................... 5-8
Cable Lock Provision........................................................................................ 5-8
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vi Compaq Deskpro Workstation AP250 Maintenance and Service Guide
Chapter 6
Jumper and Switch Information
Power-On Password .................................................................................................6-3
Hard Drives ..............................................................................................................6-4
Ultra ATA Hard Drive (20-GB ATA66 7,200 rpm) .........................................6-4
Ultra3 SCSI Hard Drive (9.1-GB WU3 10,000 rpm)........................................6-5
Ultra3 SCSI Hard Drive (18.2-GB WU3 10,000 rpm)......................................6-6
Disk Drives...............................................................................................................6-7
40X Max CD-ROM or DVD-ROM Drive........................................................6-7
Zip Drive...........................................................................................................6-8
Chapter 7
Physical and Operating Specifications
System Unit..............................................................................................................7-2
200W Power Supply................................................................................................. 7-8
Diskette Drive...........................................................................................................7-9
Hard Drives ............................................................................................................7-10
20-GB Ultra ATA Hard Drive (7,200 rpm).....................................................7-10
9-GB Wide Ultra3 SCSI Hard Drive (10,000 rpm).........................................7-11
18-GB Ultra3 SCSI Hard Drive (10,000 rpm) ................................................ 7-12
40X Max CD-ROM Drive......................................................................................7-13
DVD-ROM Drive...................................................................................................7-15
Zip Drive ................................................................................................................7-18
Zip Drive CartridgeDrive................................................................................7-18
Audio System ......................................................................................................... 7-19
Keyboard ................................................................................................................7-20
Mouse.....................................................................................................................7-20
Graphics Controllers...............................................................................................7-21
PowerStorm 300 Graphics Controller.............................................................7-21
3Dlabs Oxygen GVX1 AGP Graphics Controller...........................................7-22
Matrox G400 Graphics Controller ..................................................................7-22
Network Controller.................................................................................................7-23
RJ-45 Network Cable Specifications ..............................................................7-23
Chapter 8
External Connectors
Physical Location .....................................................................................................8-1
Rear Panel Connectors ...................................................................................... 8-2
Pin Assignments.......................................................................................................8-3
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Page 14
This guide is designed to be used as step-by-step instructions for installation
and as a reference for operation, troubleshooting, and future upgrades.
Text Conventions
This document uses the following conventions to distinguish elements of text:
Keys
Contents vii
About This Guide
Keys appear in boldface. A plus sign (+) between
two keys indicates that they should be pressed
simultaneously.
USER INPUT User input appears in a different typeface and in
uppercase.
FILENAMES
Menu Options,
Command Names,
Dialog Box Names
COMMANDS,
DIRECTORY NAMES,
and DRIVE NAMES
Type
Enter When you are instructed to
File names appear in uppercase italics.
These elements appear in initial capital letters.
These elements appear in uppercase.
When you are instructed to
the information
the information and then press the
without
type
information, type
pressing the
enter
information, type
Enter
Enter
key.
key.
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Page 15
viii Compaq Deskpro Workstation AP250 Maintenance and Service Guide
Symbols in Text
These symbols may be found in the text of this guide. They have the following
meanings.
WARNING:
in the warning could result in bodily harm or loss of life.
CAUTION:
could result in damage to equipment or loss of information.
IMPORTANT:
instructions.
NOTE:
Text set off in this manner presents commentary, sidelights, or interesting points
of information.
Text set off in this manner indicates that failure to follow directions
Text set off in this manner presents clarifying information or specific
Symbols on Equipment
These icons may be located on equipment in areas where hazardous conditions
may exist.
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.
WARNING:
not open this enclosure.
Text set off in this manner indicates that failure to follow directions
To reduce the risk of injury from electric shock hazards, do
Any RJ-45 receptacle marked with these symbols indicates a Network
Interface Connection.
WARNING:
equipment, do not plug telephone or telecommunications connectors
into this receptacle.
To reduce the risk of electric shock, fire, or damage to the
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Page 16
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.
Contents ix
Rack Stability
WARNING:
To reduce the risk of injury from a hot component, allow
the surface to cool before touching.
Power Supplies or Systems marked with these symbols
indicate the equipment is supplied by multiple sources of
power.
WARNING:
To reduce the risk of injury from electrical shock,
remove all power cords to completely disconnect power from
the system.
WARNING:
To reduce the risk of personal injury or damage to the equipment,
be sure that:
The leveling jacks are extended to the floor.
■
The full weight of the rack rests on the leveling jacks.
■
The stabilizing feet are attached to the rack if it is a single rack installation.
■
The racks are coupled together in multiple rack installations.
■
A rack may become unstable if more than one component is extended for
■
any reason. Extend only one component at a time.
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Page 17
x Compaq Deskpro Workstation AP250 Maintenance and Service Guide
Getting Help
If you have a problem and have exhausted the information in this guide, you
can get further information and other help in the following locations.
Compaq Technical Support
You are entitled to free hardware technical telephone support for your product
for as long as you own the product. A technical support specialist will help
you diagnose the problem or guide you to the next step in the warranty
process.
In North America, call the Compaq Technical Phone Support Center at
1-800-OK-COMPAQ. This service is available 24 hours a day, 7 days a week.
For continuous quality improvement, calls may be recorded or monitored.
Outside North America, call the nearest Compaq Technical Support Phone
Center. Telephone numbers for worldwide Technical Support Centers are
listed on the Compaq website. Access the Compaq website at:
www.compaq.com
Be sure to have the following information available before you call Compaq:
■
Technical support registration number (if applicable)
■
Product serial numbers
■
Product model names and numbers
■
Applicable error messages
■
Add-on boards or hardware
■
Third-party hardware or software
■
Operating system type and revision level
■
Detailed, specific questions
Compaq Website
The Compaq website has information on this product as well as the latest
drivers and Flash ROM images. Access the Compaq website at:
www.compaq.com
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Page 18
Compaq Authorized Reseller
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.
■
Elsewhere, see the Compaq website for locations and telephone
numbers.
Contents xi
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Chapter
Illustrated Parts Catalog
This chapter provides an illustrated parts overview and a reference for spare
parts for the Compaq Deskpro Workstation AP250.
1
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
1-2
Mechanical Parts
59f
59g
1
58a
59i
59e
59d
2
3
Figure 1-1. Exploded view of the Compaq Deskpro Workstation AP250
mechanical parts
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Page 21
System Components
24
12
Illustrated Parts Catalog
3
1-3
6
20
5
58c
4
59c
8
13
59c
7
15
11
Figure 1-2. Exploded view of the Compaq Deskpro Workstation AP250
mechanical parts
47
19
17
18
44
46
23
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Page 22
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
1-4
Spare Parts List
Table 1-1
Spare Parts List for the Compaq Deskpro Workstation AP250
Reference Description Part Number
MECHANICAL
1
2
3
SYSTEM
4
5
6
7
8
9
10
11
12
MEMORY
13
Access panel 166867-001
Front bezel 158268-001
Chassis/base pan 166880-001
PremierSound Speaker 158267-001
Fan, 92MM 166974-001
Power supply, 3.3V, 200W 103748-001
System board for the Compaq Deskpro
Workstation AP250
Intel Pentium III Processor, 600/133 MHz, 512K with
heat sink
Intel Pentium III Processor, 733/133 MHz, 512K with
heat sink
Lock security bracket 199109-001*
Lithium Battery 153099-001*
Power switch and LEDs with cable (cable 166879-002) 166925-001
128-MB of ECC Direct Rambus Dynamic Random
Access Memory (RDRAM) (700)
123511-001
158263-001
163363-001*
158264-001
14
15
* Not illustrated
128-MB of ECC Direct Rambus Dynamic Random
Access Memory (RDRAM) (800)
Continuity RIMM Module 158265-001
157112-001*
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continued
Page 23
Illustrated Parts Catalog
Table 1-1
Spare Parts List for the Compaq Deskpro Workstation AP250
Reference Description Part Number
MASS STORAGE
continued
1-5
16
17
18
19
20
21
22
CABLE KITS
23
24
25
26
27
KEYBOARD AND MOUSE
28
29
MONITORS
9.1-GB Ultra3 SCSI hard drive (10,000 RPM) 160062-001*
18.2-GB Ultra3 SCSI hard drive (10,000 RPM) 160063-001
20-GB Ultra ATA hard drive (7,200 RPM) 157403-001
1.44-MB diskette drive 158266-001
40X Max CD-ROM drive (IDE) 400807-001
DVD-ROM drive 105771-001*
Zip drive 401624-001*
Miscellaneous Cable Kit 166879-001
SCSI Cable 402226-001
SCSI LED cable 247485-001*
NIC Wake-on-LAN cable assembly 166974-001*
Power cord 121258-001*
Keyboard 269513-xxx*
Three-button mouse 327716-001*
30
31
32
33
34
35
* Not illustrated
P75 307815-xxx*
V75 307713-xxx*
V90 305602-xxx*
P1610 monitor 305708-xxx*
P110 monitor 284959-xxx*
P110 monitor (INT) 284959-xxx*
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continued
Page 24
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
1-6
Table 1-1
Spare Parts List for the Compaq Deskpro Workstation AP250
Reference Description Part Number
continued
36
37
38
39
40
41
42
GRAPHICS
43
44
45
CONTROLLERS
SPS, TFT5000 flat panel monitor – TC099, carbon,
touch screen, NA
SPS, TFT5000 flat panel monitor – TC099, opal, touch
screen, NA
TFT8000 flat panel monitor, opal, without protective
panel, TC095,WW
TFT8000 flat panel monitor, opal, with protective panel,
TC095,WW
TFT8000 flat panel monitor, carbon, without protective
panel, TC095,WW
TFT8000 flat panel monitor, carbon, with protective
panel, TC095,WW
TFT 500:
Order TFT 500 spare parts from the TFT 500
115712-001*
115714-001*
307911-001*
102358-B24*
102359-B24*
102360-B29*
285012-001*
guide
Matrox Productiva G400 Multi-Monitor Series Graphics
Controller
Synergy II Graphics Controller 146140-001
3Dlabs Oxygen GVX Graphics Controller 146141-001*
400437-001*
46
COMMUNICATIONS
47
* Not illustrated
Wide-Ultra2 SCSI Controller, PCI 358227-001
Intel PRO/100+ Management Adapter NIC (10/100 Mb/s
Auto-sensing Ethernet controller) PCI card with
Wake-On/Alert-On LAN
108897-001
Compaq Confidential – Need to Know Required
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continued
Page 25
Illustrated Parts Catalog
Table 1-1
Spare Parts List for the Compaq Deskpro Workstation AP250
Reference Description Part Number
SOFTWARE
continued
1-7
48
49
50
51
52
53
54
55
56
57
MISCELLANEOUS
58
Magellan Driver CD 297863-001*
Spaceball Driver CD 298033-001*
Microsoft Windows NT Workstation 4.0 CD 275573-xx1*
Magellan 3D Pointing Device (spacemouse) 297645-001*
Spaceball 4000 3D Pointing Device 118029-001*
3.5-inch to 5.25-inch diskette drive mounting bracket
with screws and brace for use in bay 3 only
3.5-inch to 5.25-inch hard drive mounting bracket 243231-001*
3.5-inch to 5.25-inch 1/2 height mounting bracket for
use in bays 1 and 2 only
Shipping box with buns (US) 166990-001*
Shipping box with buns (INTL) 166990-002*
Miscellaneous hardware kit includes:
a. slot cover (5)
b. I/O panel
c. fan guard
d. screw, 6-32 pan head x 1/4 inch (4)*
e. screw, M3 x 1/4 inch*
f. thumbscrew (2)*
g. plastite flathead screw (4)*
h. plastic push lock fastener for fan assembly (4)*
166923-001*
243230-002*
166879-002
* Not illustrated
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continued
Page 26
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
1-8
Table 1-1
Spare Parts List for the Compaq Deskpro Workstation AP250
Reference Description Part Number
continued
59
DOCUMENTATION
60
61
62
* Not illustrated
Miscellaneous plastics kit for minitower and desktop
includes:
a. diskette bezel*
b. rubber feet (8)*
c. processor retainer with T-15 claynuts
d. blank bezel
e. subpanel
f. drivelock, minitower
g. drivelock, desktop
h. drivelock springs (2)*
i. card guide
Maintenance and Service Guide 158269-001*
Illustrated Parts Map 161672-001*
Service Quick Reference Guide (revision 40 or higher) 107315-040*
166878-001
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Page 27
Service Preliminaries
This chapter identifies the following service considerations:
■
Preliminary warnings and cautions
■
Electrostatic discharge information
■
Equipment symbols
■
Tools and software requirements
■
Warranty information
Chapter
2
IMPORTANT:
essential for proper service.
Adherence to the procedures and precautions described in this chapter is
Preliminary Warnings and Cautions
The following should be noted when operating or servicing the Compaq
Deskpro Workstation AP250:
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 safety feature.
Plug the power cord into a grounded (earthed) electrical outlet that is
easily accessible at all times.
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Page 28
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
2-2
WARNING:
only authorized service technicians should attempt to repair this equipment.
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.
CAUTION:
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:
(15 cm) of clearance at the front of the workstation and 3 inches (7.6 cm) at
the back.
IMPORTANT:
modifications may void any warranty.
To reduce the risk of personal injury from hazardous energy levels,
The power supply in the Compaq Deskpro Workstation AP250 has an
To properly ventilate the system, you must provide at least 6 inches
Any indications of component replacement or printed wiring board
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:
■
Transport products in static-safe containers such as conductive tubes,
bags, or boxes.
Writer:
Bruce Sullivan
Part Number:
■
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 the work area free of non-conductive materials such as ordinary
plastic assembly aids and foam packing.
■
Always be sure you are properly 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 service tools.
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Page 29
Equipment Symbols
The following symbols are located on applicable components of the
workstation and should be observed when servicing the workstation to avoid
personal injury or damage to the components:
Service Preliminaries
2-3
WARNING:
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:
symbols indicates the presence of electrical shock hazards. The enclosed
area contains no operator-serviceable parts. To reduce the risk of personal
injury from electrical shock hazards, do not open this enclosure.
WARNING:
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.
Any surface or area of the equipment marked with these
Any surface or area of the equipment marked with these
Any RJ-45 receptacle marked with these symbols indicates a
Tools and Software Requirements
To service the workstation, you will need the following:
■
Torx T-15 screwdriver
■
Flat-blade screwdriver
■
Diagnostics diskette
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Page 30
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
2-4
Warranty Information
The workstation comes
Standard Warranty
Pre-Failure Warranty
standard
with the following warranties:
-Refer to the warranty card included with the unit.
-A special warranty that extends the Compaq 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.
IMPORTANT:
void warranty for damaged components.
Observe all warnings and cautions provided herein. Failure to do so may
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Page 31
Removal and Replacement Procedures
This chapter provides subassembly/module-level removal and replacement
procedures for the Compaq Deskpro Workstation AP250.
After completing all necessary removal and replacement procedures, run the
Compaq Setup and Diagnostics utility to verify that all components are
operating properly.
Serial Number
Provide the computer serial number to Compaq whenever you request
information or order spare parts. The serial number is located on the top corner
of the workstation 1 and also on the rear of the chassis 2 as shown in
Figure 3-1.
Chapter
3
For asset control, the serial number is embedded in the EPROM on the system
board. If the system board is replaced with a spare part from Compaq, an
invalid serial number condition will be reported during the Power-On
Self-Test (POST). To clear the condition, reenter the original serial number
through Computer Setup.
NOTE:
POST recognizes the serial number as a valid number if a system board from
another workstation is installed.
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Page 32
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-2
Figure 3-1. Identifying serial number locations
Service Preparations
1
2
CAUTION:
you are properly grounded before beginning any installation procedure. See
“Electrostatic Discharge Information” in Chapter 2 for more information.
Electrostatic discharge can damage electronic components. Be sure
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.
IMPORTANT:
the grounded AC outlet when removing or replacing components.
On a power-managed system, the power cord
must
be disconnected from
3. Turn off all peripheral devices and disconnect cables from the rear of the
workstation.
See Chapter 2 for more information on preparing the workstation for service.
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Page 33
Removing the Cable Lock
The workstation comes standard with a cable lock provision for attaching a
padlock 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.
2. Remove the screw cover plate 1 seated over the cable lock bracket 2.
3. Unscrew the T-15 torx retaining screw 3.
4. Remove the angled plate 4.
5. Remove the cable lock bracket 2.
Removal and Replacement Procedures
3-3
Figure 3-2. Removing the padlock
2
4
3
1
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Page 34
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-4
Removing the Side Access Panel
To remove the workstation side access panel:
1. Perform the steps in the “Service Preparations” section.
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
Before removing the side access panel, ensure that the workstation
2. Loosen the two thumbscrews that secure the side access panel to the
workstation chassis.
3. Slide the side access panel back about 1 inch (2.5 cm), then lift it off of
the workstation.
Figure 3-3. Removing the side access panel
To replace the side access panel, reverse the above procedure.
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Page 35
Removing the Front Bezel
1. Turn off the workstation and any external devices. Disconnect the power
cord from the grounded AC outlet and the network cable from the
system.
2. Loosen the two thumbscrews that secure the side access panel to the
workstation chassis
3. Remove the workstation side access panel.
4. Push in on the two release tabs 1, then rotate the front bezel away from
the chassis to release it 2.
Removal and Replacement Procedures
3-5
1
Figure 3-4. Removing the front bezel
2
2
When replacing the front bezel, ensure that the bottom hinge points are
properly placed in the chassis before rotating the front bezel back into its
original position.
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Page 36
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-6
Removing the Subpanel and Bezel Blank
1. Turn off the workstation and any external devices. Disconnect the power
cord from the grounded AC outlet and the network cable from the
system.
2. Loosen the two thumbscrews that secure the side access panel to the
workstation chassis.
3. Remove the workstation side access panel.
4. Remove the front bezel.
5. Gently pull the subpanel, with the bezel blank secured in it, away from
the front bezel. Remove the bezel blank.
CAUTION:
bezel. Pulling the subpanel away at an angle could damage the pins that align it
within the front bezel.
Figure 3-5. Removing the subpanel and bezel blanks
Hold the subpanel straight when you pull it away from the front
To replace the subpanel and bezel blank, reverse the above procedure. Be sure
the subpanel and front bezel align properly with the alignment tabs.
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Page 37
Mass Storage Devices
This section discusses removal and replacement procedures for the mass
storage devices supported on the Compaq Deskpro Workstation AP250.
Drive Positions
The Compaq Deskpro Workstation AP250 can house up to five mass storage
devices. The following illustration identifies the physical drive locations for
minitower and desktop workstations. See Table 3-1 for a list of recommended
drive configurations.
Removal and Replacement Procedures
1
2
3
3-7
3
2
4
5
Figure 3-6. Identifying drive positions
1
5 4
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Page 38
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-8
Table 3-1
Drive Positions
Bay Bay Width Bay Height Device Configurations
1
5.25-inch bay Half-height Optional drive
2
5.25-inch bay Half-height CD-ROM/optional drive (1.6-inch)
3
5.25-inch bay Third-height
4
3.5-inch bay Third-height Optional hard drive (1.0-inch)
5
3.5-inch bay Third-height Standard hard drive
NOTE:
Compaq does not support mixing Ultra ATA and SCSI hard drives in the same
system. If you are replacing a hard drive in bay 4 or 5, the device must be of the same
type. If you are replacing the Ultra ATA hard drive in bay 4 or 5 with a SCSI hard drive, you
need a SCSI device option kit and the SCSI controller option kit. The controller option kit
contains the SCSI controller and cable that supports multiple SCSI devices. See “Installing
Optional SCSI Devices” later in this chapter for more information.
Standard 1.44-MB diskette drive
(1.0-inch) (A high density diskette
drive is mounted with a drive adapter
into a 5.25-inch bay.)
NOTE:
For optimal performance, connect hard drives to the primary controller. Connect
expansion devices, such as IDE CD-ROM, tape, and diskette drives to the secondary
controller.
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Page 39
Removal and Replacement Procedures
3-9
IMPORTANT:
cage. Compaq has provided extra guide screws, installed in the front of the workstation
chassis behind the front bezel. Some options use 5.25 M3 metric screws and some use
HD 6-32. The Compaq-supplied metric screws are black.
Install guide screws to ensure that the drives line up correctly in the drive
6-32
Figure 3-7. Identifying the metric screws
M3
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Page 40
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-10
Removing a 3.5-inch Hard Drive
To remove a 3.5-inch hard drive:
1. Perform the steps in the “Service Preparations” section.
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
Before removing the side access panel, ensure that the workstation
2. Loosen the two thumbscrews that secure the side access panel to the
workstation chassis.
3. Remove the side access panel.
4. Remove the front bezel.
5. Disconnect the power and data cables from the back of the hard drive.
Figure 3-8. Disconnecting the hard drive cables
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Page 41
Removal and Replacement Procedures
6. Slide the drivelock to unlock the hard drive.
Figure 3-9. Releasing the hard drive with the drivelock
3-11
NOTE:
Do not hold the face plate while removing a drive, only hold a drive by its casing.
7. While sliding the drivelock, push from the rear of the drives until the
drive casing can be grasped.
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-12
8. While holding the drive casing, pull the drives out of the drive bay 1.
2
Figure 3-10. Removing a 3.5-inch hard drive
1
2
9. Remove the two guide screws from each side of the drive 2.
To replace the 3.5-inch hard drive:
1. Install two 6-32 guide screws on each side of the replacement drive,
making sure the guide screws line up with the guide slots.
2. Slide the hard drive into the drive bay until it locks into place.
IMPORTANT:
use an 80-conductor IDE Ultra ATA cable for optimal performance. This cable is included
in the hard drive option kit.
When installing a second Ultra ATA hard drive on the primary controller,
Removing a 3.5-inch Hard Drive with 5.25-inch
Drive Adapter
If you are installing a second 3.5-inch diskette drive into bay 1 or 2 for the first
time, you must use a special adapter bracket. (See Chapter 1 for the spare part
number.)
If you are installing a 3.5-inch diskette drive into bay 3, you must use a special
adapter bracket. (See Chapter 1 for the spare part number.)
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Page 43
Removal and Replacement Procedures
To remove a 3.5-inch drive with a 5.25-inch drive adapter:
1. Perform the steps in the “Service Preparations” section.
3-13
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
Before removing the side access panel, ensure that the workstation
2. Remove the side access panel.
3. Remove the front bezel.
4. Disconnect the cables from the back of the drive.
5. Slide the drivelock to unlock the drive.
Figure 3-11. Releasing the hard drive with the drivelock
NOTE:
Do not hold the face plate while removing a drive. Only hold a drive by its casing.
6. While sliding the drivelock, push from the rear of the drive until the
drive casing can be grasped from the front.
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Page 44
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-14
7. While holding the drive casing, pull the drive out of the drive bay 1.
8. Remove the four guide screws 2.
2
2
Figure 3-12. Removing a 3.5-inch drive from a 5.25-inch drive bay
1
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Page 45
Removal and Replacement Procedures
9. Remove the screws that secure the hard drive to the drive adapter 1.
10. Remove the hard drive from the drive adapter 2.
2
1
1
3-15
Figure 3-13. Removing a 3.5-inch hard drive from the 5.25-inch drive adapter
To replace the drive, reverse the above procedure.
IMPORTANT:
The primary 3.5-inch diskette drive should only be installed into bay 3.
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Page 46
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-16
Removing a CD-ROM
To remove a CD-ROM drive:
1. Perform the steps in the “Service Preparations” section.
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
Before removing the side access panel, ensure that the workstation
2. Remove the side access panel.
3. Remove the front bezel.
4. Disconnect the cables from the back of the CD-ROM drive.
Figure 3-14. Disconnecting the cables from the CD-ROM drive
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Page 47
Removal and Replacement Procedures
5. While pushing the drivelock, push from the rear of the drives until the
drive casing can be grasped.
Figure 3-15. Releasing the CD-ROM drive with the drivelock
3-17
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Page 48
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-18
6. While holding the drive casing, pull the drives out of the drive bay 1.
7. Remove the four guide screws 2.
2
2
Figure 3-16. Removing a CD-ROM drive from a 5.25-inch drive bay
1
To replace the CD-ROM drive:
1. Install two M3 guide screws on each side of the replacement 5.25-inch
drive (in the bottom holes), making sure the guide screws line up with
the guide slots.
2. Slide the drive into the drive bay until it locks into place.
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Page 49
Removal and Replacement Procedures
Installing Optional SCSI Devices
Select models of the Compaq Deskpro Workstation AP250 have a preinstalled
internal SCSI hard drive. You can install additional SCSI devices using the
external SCSI connector located on the rear panel of the workstation.
Important Guidelines for Installing Optional SCSI
Devices
3-19
If you are installing additional SCSI devices, you
MUST
adhere to the
following guidelines:
■
To preserve data integrity, do not install more than seven SCSI devices
per SCSI controller.
■
The Wide-Ultra2 SCSI controller requires that a unique SCSI ID (0-7)
be set for each SCSI device installed. The controller identifies a SCSI
device by its SCSI ID number rather than its location. Moving a SCSI
device from one position to another on the SCSI chain does not affect
communication between the controller and the SCSI device. The
reserved and available SCSI ID numbers for SCSI devices are as
follows:
Y
SCSI ID 0 is reserved for the primary hard drive.
Y
SCSI ID 7 is reserved for the controller.
Y
SCSI IDs 1 through 6 are available.
■
Every SCSI chain or circuit must be terminated (closed) at both ends. If
using a terminated cable, disable the termination for all devices. If using
a non-terminated cable, only disable 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 recognize the
external SCSI device. When external SCSI devices are connected to the
external SCSI connector on the rear panel of the workstation, that device
becomes the end of the SCSI chain and must be terminated.
CAUTION:
routed in this manner may block airflow to the power supply, causing it to
overheat.
Do not route cables near the intake to the power supply. Cables
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Page 50
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-20
Using the SCSI Cable
The three-device SCSI cable pictured in Figure 3-17 is included with your
workstation (available on select models). The cable supports up to three SCSI
devices and comes with a terminator 1 on the end.
1
Figure 3-17. Identifying SCSI cable with terminator
NOTE:
The SCSI cable included with your workstation may look slightly different than the
one pictured.
NOTE:
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.
For additional information about installing optional SCSI devices, refer to the
documentation included with the device option kit.
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Page 51
Removing the Drivelock
The workstation chassis has a drivelock that secures the drives in both the
minitower and desktop configurations.
To remove the drivelock:
1. Perform the steps in the “Service Preparations” section.
Removal and Replacement Procedures
3-21
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
Before removing the side access panel, ensure that the workstation
2. Remove the side access panel.
3. Remove the front bezel.
4. Remove all drives from the computer.
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3-22
5. Snap the tabs out of the holes in the drive cage 1.
6. Lift up on the side of the drivelock nearest you and push the drivelock
towards the front of the drive cage 2.
CAUTION:
The spring under the drivelock may pop out unexpectedly.
7. Remove the drivelock from the drive cage.
8. Remove the spring from the drivelock 3.
1
2
Figure 3-18. Removing the Drivelock
2
3
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Removal and Replacement Procedures
To reinstall the drivelock:
1. Insert the left side of the drivelock (with the rounded tabs) into the slots
on the drive cage 1.
2. Place the spring 2 on the middle tab on the underside of the drivelock.
3. Compress the spring, then lower the drivelock onto the drive cage until
it snaps into place 3.
1
3
3
3-23
2
Figure 3-19. Reinstalling the drivelock
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-24
Expansion Boards
The following illustration identifies the physical location of expansion slots.
See the corresponding table for component names.
2 43
1
Figure 3-20. View of the expansion slots
Table 3-2
Expansion Slots
Identifier Description
1
2
3
4
ISA slot
Combination slot for either an ISA or a PCI expansion board
Four PCI slots
Accelerated Graphics Port (AGP) slot
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Removing an Expansion Board
To remove an expansion board:
1. Perform the steps in the “Service Preparations” section.
Removal and Replacement Procedures
3-25
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
Before removing the side access panel, ensure that the workstation
2. Remove the side access panel.
3. Disconnect any cables from the expansion board.
4. Remove the expansion board retaining screw.
5. Hold the expansion board at each end and carefully pull out until the
connectors pull free from the slot.
Figure 3-21. Removing an expansion board
To install an expansion board, remove the expansion slot cover and reverse the
above procedure.
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-26
Removing the Card Guide
To remove the card guide:
1. Perform the steps in the “Service Preparations” section.
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
Before removing the side access panel, ensure that the workstation
2. Remove the side access panel.
3. Remove any full-length expansion boards.
4. Push down on the two tabs on the top of the card guide 1.
5. While holding the tabs down, remove the card guide from the chassis 2.
2
1
Figure 3-22. Removing the Card Guide
To replace the card guide, reverse the above procedure.
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Removal and Replacement Procedures
Installing Memory Modules
Important Guidelines for Direct RIMM Installation
3-27
When installing RIMMs (Rambus Inline Memory Modules), you
follow these guidelines:
■
Use only 128-MB or 256-MB, 700- or 800-MHz Error Checking and
Correcting (ECC) RIMMs.
■
A RIMM can be installed only one way. Be sure to match the two key
slots on the RIMM with the tab on the RIMM socket. Push the RIMM
down into the RIMM socket, ensuring that it is fully inserted and
properly seated.
■
Do not exceed 32 count devices on each Direct Rambus memory
channel. A factory label on the RIMM indicates the size and number of
DRAMS contained on the RIMM.
■
A CRIMMs (Continuity RIMMs) must be installed in the unpopulated
RIMM slot.
■
For optimal performance, populate slot 1 first, then slot 2.
NOTE:
Your workstation will support up to 1-GB of memory when 256-MB DRAM
technology is available.
Installing RIMM Modules
CAUTION:
may damage the module.
MUST
When handling a RIMM, do not touch any of the contacts. Doing so
CAUTION:
workstation or optional boards. Before beginning these procedures, ensure that
you are discharged of static electricity by briefly touching a grounded metal
object.
IMPORTANT:
Guidelines for Direct RIMM Installation.”
Static electricity can damage the electronic components of the
Before installing additional RIMMs, read the previous section, “Important
The workstation comes with at least 128-MB of Error Checking and
Correcting (ECC) Direct RIMMs installed. Additional RIMMs are available to
upgrade the memory. A maximum of 32 count devices is supported on each
Rambus channel. The workstation has two RIMM sockets on the system board
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-28
to support up to 1-GB. The two RIMM sockets are numbered RIMM1 and
RIMM2, with RIMM1 being closest to the processor. A CRIMM must
populate an empty slot.
The following illustration identifies the physical location of all RIMM sockets.
For optimal performance, populate slot 1 first, then slot 2.
1
2
Figure 3-23. RIMM slots 1 & 2
To remove a memory module:
1. Perform the steps in the “Service Preparations” section.
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
Before removing the side access panel, ensure that the workstation
2. Remove the side access panel.
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Removal and Replacement Procedures
3. Press outward on both latches of the RIMM at the same time 1. This
releases the module and pushes it partially out of the socket.
4. Lift the module from the socket 2.
1
3-29
Figure 3-24. Removing a RIMM memory module
NOTE:
The system recognizes memory upgrades and automatically reconfigures the
workstation.
Removing a Processor
WARNING:
internal system components to cool before touching them.
To remove the processor:
1. Perform the steps in the “Service Preparations” section.
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
2
To reduce the risk of personal injury from hot surfaces, allow the
Before removing the side access panel, ensure that the workstation
1
2. Remove the side access panel.
3. Remove the AGP graphics controller before removing the processor.
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-30
4. Pull out the retaining tabs on each side of the processor 1, then lift the
processor out of the socket 2.
2
1
Figure 3-25. Removing the processor from the system board
1
To install a new processor, reverse the above procedure.
NOTE:
Before installing a processor, be sure the release latches are in the locked (out)
position. This will cause the latches to click into place when the processor is properly
seated.
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Removal and Replacement Procedures
Removing a 733-MHz Processor from the Heatsink
3-31
WARNING:
internal system components to cool before touching them.
To reduce the risk of personal injury from hot surfaces, allow the
To remove the processor from the heatsink:
1. Perform the steps in the “Service Preparations.”
CAUTION:
is turned off, all cables are disconnected from the back of the Workstation, and
the power cord is disconnected from the grounded AC outlet.
Before removing the side access panel, ensure that the Workstation
2. Remove the side access panel.
3. Perform the steps in the “Removing a Processor” section.
4. Slide the metal bracket on the back of the processor to the left 1 and
remove the bracket.
1
Figure 3-26. Removing the metal bracket from the back of the processor
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3-32
5. Lift the processor off the pins on the back of the heatsink 2.
Figure 3-27. Removing the 733-MHz processor from the heatsink
2
To install a new processor/heatsink, reverse the above procedure.
NOTE:
Before installing a processor, be sure the release latches are in the locked (out) position. This will
cause the latches to click into place when the processor is properly seated.
Removing the Processor Guide Rails
CAUTION:
workstation. Before beginning these procedures, be sure you are discharged of
static electricity by briefly touching a grounded metal object.
To remove the processor guide rails:
1. Perform the steps in the “Service Preparations” section.
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
2. Remove the side access panel.
3. Remove the processor.
Static electricity can damage the electronic components of the
Before removing the side access panel, ensure that the workstation
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Removal and Replacement Procedures
4. Using a Torx T-15 screwdriver, loosen the four claynuts 1 that attach
the processor guide rails to the system board, then remove the rails 2.
3-33
1
Figure 3-28. Removing the processor guide rails from the system board
To replace the processor guide rails, seat the guide rails flush with the system
board, then tighten the four claynuts.
Removing the Speaker
To remove the speaker:
1. Perform the steps in the “Service Preparations” section.
2
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
Before removing the side access panel, ensure that the workstation
2. Remove the side access panel.
3. Disconnect the speaker cable from the system speaker connector on the
system board.
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-34
4. Remove the four screws that secure the speaker to the side of the
chassis 1, then remove the speaker 2.
1
Figure 3-29. Removing the speaker
2
To reinstall the speaker, reverse the above procedure.
Removing the Power Supply
To remove the power supply:
1. Perform the steps in the “Service Preparations” section.
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
2. Remove the side access panel.
3. Disconnect all power cables from the mass storage devices and the
system board.
Before removing the side access panel, ensure that the workstation
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Removal and Replacement Procedures
4. Remove the four external screws that secure the power supply to the
back of the chassis 1.
NOTE:
The internal screw 2 that secures the power supply to the side of the chassis
may not need to be removed, only loosened.
5. Slide the power supply toward the front of the computer, then lift up and
remove it from the chassis 3.
1
3
3-35
2
Figure 3-30. Removing the Power Supply
To replace the power supply, reverse the above procedure.
WARNING:
outlet. To reduce the risk of electrical shock, damage to the equipment, or loss
of the data, do not disable this feature. The grounding type plug is an important
safety feature.
WARNING:
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 equipment damage.
This equipment is designed for connection to a grounded (earthed)
This procedure should be performed only by qualified personnel. Do
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3-36
Removing the Power Switch
CAUTION:
Doing so may damage the switch components.
The power switch should not be removed from the switch holder.
To remove the power switch and switch holder:
1. Perform the steps in the “Service Preparations” section.
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
Before removing the side access panel, ensure that the workstation
2. Remove the side access panel.
3. Disconnect the power/LED cable from the system board 1.
4. Push the release tab toward the drive bays 2, then remove the power
switch from the chassis 3.
2
3
1
Figure 3-31. Disconnecting and removing the power switch and switch holder
To reinstall the power switch, reverse the above procedure, pushing the power
switch until it snaps into place.
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Removing the System Board
Removal and Replacement Procedures
3-37
CAUTION:
workstation. Before beginning these procedures, be sure you are discharged of
static electricity by briefly touching a grounded metal object.
Static electricity can damage the electronic components of the
To remove and replace the system board:
1. Perform the steps in the “Service Preparations” section.
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
Before removing the side access panel, ensure that the workstation
2. Remove the side access panel.
3. Remove all expansion boards.
4. Perform the steps in the “Removing the Speaker” section.
5. Disconnect all cables that are attached to the system board.
6. Remove the six retaining screws that secure the system board to the
chassis.
7. Slide the board 1/2 inch (1.27 cm) toward the front of the chassis
to clear the I/O panel connectors, then lift the board up and out of
the chassis.
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3-38
Figure 3-32. Removing the system board
To install a new system board, reverse the above procedure.
When installing the system board, insert the first screw nearest the power
supply to properly align the board in the chassis.
Removing the I/O Panel
To remove the I/O panel:
1. Perform the steps in the “Service Preparations” section.
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
2. Remove the side access panel.
3. Remove all expansion boards.
4. Disconnect all cables that are attached to the system board.
5. Remove the system board.
Before removing the side access panel, ensure that the workstation
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Removal and Replacement Procedures
6. From the back of the chassis, push the I/O panel in towards the system
board and lift the I/O panel out.
Figure 3-33. Removing the I/O panel
3-39
To replace the I/O panel, reverse the above procedure.
Replacing the Lithium Battery
WARNING:
risk of fire and chemical burn if the battery pack is handled improperly. Do not
disassemble, crush, puncture, short external contacts, dispose of the battery in
water or fire, or expose it to temperatures higher than 60ºC (140ºF).
CAUTION:
workstation. Before beginning these procedures, be sure you are discharged of
static electricity by briefly touching a grounded metal object.
NOTE:
Before replacing the battery, create a diagnostics diskette. Instructions for
creating and using the Compaq Diagnostic Diskette are located on the Compaq website at
www.compaq.com
NOTE:
When replacing a battery, use a Renata CR2032 or equivalent 3-volt lithium coin
cell battery.
The system board contains a lithium-ion battery pack. There is a
Static electricity can damage the electronic components of the
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
3-40
To replace the lithium battery:
1. Perform the steps in the “Service Preparations” section.
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
Before removing the side access panel, ensure that the workstation
2. Remove the side access panel.
3. Locate the battery on the system board.
NOTE:
If expansion boards are installed, you may need to remove the expansion boards
to gain access to the battery.
Figure 3-34. Locating the battery on the system board
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Page 71
4. Lift the battery out of the holder.
Figure 3-35. Removing the battery
Removal and Replacement Procedures
3-41
To replace the battery, slide the replacement battery into position with the
positive side up. The battery holder automatically secures the battery in the
proper position.
IMPORTANT:
Positive polarity should be positioned up.
Converting a Minitower to a Desktop Configuration
To convert a minitower to a desktop configuration:
1. Perform the steps in the “Service Preparations” section.
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
2. Remove the side access panel.
3. Remove the front bezel.
Before removing the side access panel, ensure that the workstation
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3-42
4. Disconnect all power and data cables from the drives in the 5.25-inch
drive bays.
5. Remove the drives from the 5.25-inch drive bays by sliding the
drivelock upwards while in the minitower position.
Figure 3-36. Releasing the drives with the drivelock
6. Turn the computer on its side (desktop configuration).
7. Rotate the drives counter clockwise 90 degrees, then reinstall them into
the drive bays.
IMPORTANT:
the chassis in the desktop configuration for proper drive clearance and access.
The diskette drive should always be placed in the bay nearest the top of
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Removal and Replacement Procedures
Figure 3-37. Installing a drive in the desktop configuration
8. Reconnect the cables to the drives.
9. Remove the subpanel.
3-43
CAUTION:
bezel. Pulling the subpanel away at an angle could damage the pins that align it
within the front bezel.
Hold the subpanel straight when you pull it away from the front
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3-44
Minitower Configuration
Desktop Configuration
Figure 3-38. Rotating the bezel blank when converting a minitower to a
desktop
10. Install the bezel blank onto the new subpanel with the correct logo
placement.
11. Install the new subpanel.
12. Reassemble the computer. Be sure the subpanel and front bezel align
properly with the alignment tabs.
CAUTION:
remaining bezel blanks are in the proper orientation to prevent damage to the
alignment pins. See Figure 3-38 for the subpanel keyed alignment positions.
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When replacing the subpanel, be sure the aligning pins and any
Page 75
Converting a Desktop to a Minitower Configuration
To convert a desktop to a minitower configuration:
1. Perform the steps in the “Service Preparations” section.
Removal and Replacement Procedures
3-45
CAUTION:
is turned off, all cables are disconnected from the back of the workstation, and
the power cord is disconnected from the grounded AC outlet.
2. Remove the side access panel and the front bezel.
3. Disconnect all power and data cables from the drives in the 5.25-inch
drive bays.
4. Remove the drives from the 5.25-inch drive bays by pressing the
drivelock release button.
Before removing the side access panel, ensure that the workstation
Figure 3-39. Releasing the drives with the drivelock
5. Place the computer on its base (minitower configuration).
6. Rotate the drives counter-clockwise 90 degrees, then reinstall them into
the drive bays.
IMPORTANT:
internal 3.5-inch drives, for proper placement within the chassis.
The diskette drive should always be placed in bay 3, the bay nearest the
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3-46
7. Reconnect the cables to the drives.
8. Install the bezel blank onto the new subpanel with the correct logo
placement.
9. Install the new subpanel.
CAUTION:
bezel. Pulling the subpanel away at an angle could damage the pins that align it
within the front bezel.
Hold the subpanel straight when you pull it away from the front
Desktop Configuration
Minitower Configuration
Figure 3-40. Rotating the bezel blank when converting a desktop to a
minitower
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Removal and Replacement Procedures
10. Replace the redundant subpanel, front bezel, and the side access panel.
11. Reassemble the computer. Be sure the subpanel and front bezel align
properly with the alignment tabs.
3-47
CAUTION:
remaining bezel blanks are in the proper orientation to prevent damage to the
alignment pins. See Figure 3-40 for the subpanel keyed alignment positions.
NOTE:
When switching from minitower to desktop orientation or from desktop to
minitower orientation, the bezel blank should be switched out with the replacement
provided to ensure the Compaq logo is properly oriented.
When replacing the subpanel, be sure the aligning pins and any
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Page 78
Chapter
4
Diagnostic Tools
This chapter provides information on the following topics to assist you when
servicing the Compaq Deskpro Workstation AP250.
■
Power-On Self-Test (POST)
■
Troubleshooting minor problems
■
Computer setup and diagnostics utilities
■
SCSI Error codes
■
Upgrading the ROMPaq
■
Compaq Insight Manager
■
Compaq Workstation SSD for Windows NT
■
Compaq Diagnostics for Windows NT
IMPORTANT:
essential for proper service.
Adherence to the procedures and precautions described in this chapter is
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
4-2
Power-On Self-Test
POST (Power-On Self-Test) is a series of diagnostic tests that runs
automatically when the computer system is turned on. After the computer is
turned on, POST checks the following assemblies to make sure that the
computer system is functioning properly:
■
Keyboard
■
Rambus Inline Memory Modules (RIMMs)
■
Graphics controller
■
Diskette drives
■
IDE/CD-ROM drive
■
Hard drives
■
Processor
■
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 (
POST is running. You 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
If POST finds an error in the system, an audible and/or visual message occurs.
For explanations of the error codes and a recommended course of action, see
Table 4-1.
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Page 80
POST Messages
An error message results if the POST encounters a problem. This test runs
when the system is turned on, checking assemblies within the workstation and
reporting any errors found.
Table 4-1
POST Messages
Diagnostic Tools
4-3
Message Beeps* Probable Cause
101-ROM Error. 1L, 1S System ROM checksum
101-Option ROM
Checksum Error.
102-System Board
Failure.
1L, 1S Option ROM checksum Inspect the ROM
None DMA, timers, etc.
Recommended
Action
Replace the system
board.
placement.
Verify the correct
ROM.
Replace the ROM.
Replace the system
board.
continued
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
4-4
Table 4-1
POST Messages
Message Beeps* Probable Cause Recommended
continued
Action
162-System
Options Error.
162-System
Options Not Set.
163-Time & Date
Not Set.
2S No diskette drive or
mismatch in drive type
2S Configuration incorrect
RTC (real-time clock)
battery may need to be
replaced. Battery life is
approximately 5 years.
CMOS jumper may not be
properly installed.
2S Invalid time or date in
configuration memory
RTC (real-time clock)
battery may need to be
replaced. Battery life is
approximately 5 years.
CMOS jumper may not be
properly installed.
Run Computer Setup
or Windows NT
utilities.
Run Computer Setup
or Windows NT
utilities.
First reset the date
and time under
Control Panel. If the
problem persists,
replace the RTC
battery. See Chapter
3, "Removal and
Replacement
Procedures” for
instructions.
Clear the
configuration
memory.
Set the date and
time under Control
Panel.
If the problem
persists, replace the
RTC battery. See
Chapter 3, “Removal
and Replacement
Procedures” for
instructions.
Clear the
configuration
memory.
164-Memory Size
Error.
2S
Memory configuration
incorrect
Be sure memory
module(s) are
installed properly.
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continued
Page 82
Diagnostic Tools
Table 4-1
POST Messages
Message Beeps* Probable Cause Recommended
201-Memory Error. None RAM failure Be sure memory
continued
Action
module(s) are
installed properly.
Replace the Direct
RIMMs.
4-5
202-Memory Type
Mismatch.
203-Memory
Address Error.
205-Memory Error. None Cache memory error
206-Secondary
cache controller
failure.
207-ECC Failure. 2S Single bit ECC error Replace Direct
210-Invalid
Memory
Configuration
Detected.
Maximum of 1
Gbyte of Memory
Supported. System
halted.
None Invalid memory
configuration
None RAM failure
(Processor cache)
None Cache memory controller or
RAM failure
None Too much memory installed Reduce memory
Run Computer Setup
or Windows NT
utilities.
Replace the Direct
RIMMs.
Be sure memory
module(s) are
installed properly.
Replace the Direct
RIMMs.
Replace the system
board.
Run the Setup and
Diagnostics utilities.
Run the Setup and
Diagnostics utilities.
RIMMs if error
persists.
installed by removing
Direct RIMMs.
continued
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
4-6
Table 4-1
POST Messages
Message Beeps* Probable Cause Recommended
continued
Action
212-Failed
processor.
213-Incompatible
Direct RIMM
Module.
301-Keyboard
Error.
301-Keyboard
Error or Test
Fixture Installed.
303-Keyboard
Controller Error.
304-Keyboard or
System Unit Error.
1L Processor has failed to
initialize.
2S A Direct RIMM module in
Direct RIMM socket
identified in the error
message is missing critical
SPD information or is
incompatible with the
chipset.
None Keyboard failure Reconnect the
None Keyboard failure Replace the
None I/O board keyboard
controller
None Keyboard failure
Replace the
processor and/or the
Processor Power
Module.
Replace the Direct
RIMM with a module
conforming to the
SPD standard.
keyboard with the
computer turned off.
keyboard.
Reconnect the
keyboard with
computer turned off.
Replace the system
board.
Reconnect the
keyboard with the
computer turned off.
Replace the
keyboard.
Replace the system
board.
40X-Parallel Port X
Address Conflict.
402-Monochrome
Adapter Failure.
2S Port address conflict Run Computer Setup
or Windows NT
utilities.
1L, 2S Monochrome display
controller
Replace the
monochrome display
controller.
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continued
Page 84
Table 4-1
POST Messages
Message Beeps* Probable Cause Recommended
continued
Diagnostic Tools
Action
4-7
404-Parallel Port
Address Conflict
Detected.
501-Display
Adapter Failure.
601-Diskette
Controller Error.
602-Diskette Boot
Record Error.
605-Diskette Drive
Type Error.
610-External
Storage Drive
Failure.
611-Primary
Floppy Port
Address
Assignment
Conflict.
2S Both external and internal
ports are assigned to
parallel port X.
1L, 2S Video display controller Replace the graphics
None
None
2S Mismatch in drive type Run Computer Setup
None External tape drive not
2S Configuration error Run Computer Setup
Diskette controller circuitry
or floppy drive circuitry
incorrect
Diskette in drive A not
bootable.
connected.
Run Computer Setup
or Windows NT
utilities.
controller.
Run Computer Setup.
Check and/or replace
cables.
Replace the diskette
drive.
Replace the system
board.
Replace the diskette.
or Windows NT
utilities.
Reinstall tape drive
or press F1 and
allow system to
reconfigure without
the drive.
or Windows NT
utilities.
612-Secondary
Floppy Port
Address
Assignment
Conflict.
2S Configuration error
Run Computer Setup
or Windows NT
utilities.
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continued
Page 85
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
4-8
Table 4-1
POST Messages
Message Beeps* Probable Cause Recommended
continued
Action
1151-System
Board COM Port 1
Address
Assignment
Conflict.
1152-System
Board COM Port 2
Address
Assignment
Conflict.
1155-System
Board COM Port
Address
Assignment
Conflict.
1610-Temperature
Violation Detected.
1611-Fan Failure
Detected.
1720-SMART Hard
Drive Detects
Imminent Failure.
2S Both external and internal
serial ports are assigned to
COM1.
2S Both external and internal
serial ports are assigned to
COM2.
2S COM port address conflict Run Computer Setup
None
None Fan(s) not functional Replace failing fan.
None
Internal temperature
exceeds specification.
Hard drive is about to fail or
SCSI hard drive is about to
fail.
Run Computer Setup
or Windows NT
utilities.
Run Computer Setup
or Windows NT
utilities.
or Windows NT
utilities.
Verify that computer
air vents are not
blocked and that the
cooling fan is
running.
Back up contents
and replace hard
drive.
1771-Primary Disk
Port Address
Assignment
Conflict.
2S
Internal and external IDE
hard drive controllers are
both assigned to the
primary address.
Run Computer Setup
or Windows NT
utilities.
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continued
Page 86
Table 4-1
POST Messages
Message Beeps* Probable Cause Recommended
continued
Diagnostic Tools
Action
4-9
1772-Secondary
Disk Port Address
Assignment
Conflict.
1780-Disk 0
Failure.
1781-Disk 1
Failure.
1782-Disk
Controller Failure.
1790-Disk 0
Failure.
1791-Disk 1
Failure.
1792-Secondary
Disk Controller
Failure.
1793-Secondary
Controller or Disk
Failure.
XX000Y ZZ Parity
Check 2.
2S Internal and external IDE
hard drive controllers are
both assigned to the
secondary address.
None IDE Hard drive/format error Run the Setup and
None IDE Hard drive/format error Run the Setup and
None
None
None
None
None
None Parity RAM failure
IDE Hard drive circuitry
error
IDE Hard drive error or
wrong drive type
IDE Hard drive error or
wrong drive type
IDE Hard drive circuitry
error
IDE Hard drive circuitry
error
Run Computer Setup
or Windows NT
utilities.
Diagnostics utilities.
Diagnostics utilities.
Run the Setup and
Diagnostics utilities.
Run the Setup and
Diagnostics utilities.
Run the Setup and
Diagnostics utilities.
Run the Setup and
Diagnostics utilities.
Run the Setup and
Diagnostics utilities.
Run the Setup and
Diagnostics utilities.
A Correctable
Memory Error
Occurred before
this Power-Up.
A Critical Error
Occurred before
this Power-Up.
This Workstation
has experienced an
NMI (Hardware
Error).
None
None
None NMI (Hardware Error)
Single bit ECC error during
previous POST
Critical Error (NMI) during
previous POST
Run Computer Setup
or Windows NT
utilities.
Replace the Direct
RIMMs.
Determined by NMI
source
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continued
Page 87
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
4-10
Table 4-1
POST Messages
Message Beeps* Probable Cause Recommended
continued
Action
Fixed Disk Parameter
Table or BIOS Error
System Halted.
Invalid Electronic
Serial Number.
Audible. 1L, 3S
(RESUME = F1 KEY) None As indicated to continue
3L Configuration or hardware
failure
None Electronic serial number
has become corrupted.
System ROM is bad, or
system is running in
Failsafe Boot Block mode.
Troubleshooting Minor Problems
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.
■
Verify that the workstation is turned on and the power light is
illuminated.
■
Check all cable connections. Be sure the connectors are seated properly.
■
Verify that the monitor is turned on and the power light is illuminated.
■
If monitor is dim, adjust brightness and contrast controls of the monitor.
Run the Setup and
Diagnostics utilities.
Run Computer Setup.
Reflash the ROM
using a RomPaq
diskette.
Press F1.
■
Verify that the necessary drivers have been installed for each
application.
■
Verify that all printer drivers have been installed for each application.
■
Verify that a bootable diskette was loaded in the diskette drive at
power-up.
■
Verify that a bootable compact disc was in the CD-ROM drive at
power-up.
■
Check all switch and jumper settings.
■
Verify that Computer Setup was run after installing options (memory,
disk drives, expansion boards, and so on) and industry-standard
architecture (ISA) boards.
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Page 88
Diagnostic Tools
In addition to the previous 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
■
DVD-ROM and IDE CD-ROM drive problems
■
Memory problems
■
SCSI problems
■
Network problems
■
Audio hardware conflicts
4-11
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
4-12
Power Problems
Solutions for Power Problems
Problem Possible Solution
Computer will not turn on. Be sure the workstation is connected to a
Table 4-2
grounded AC outlet.
Be sure cables from the workstation’s
power supply are plugged in properly.
A PCI or ISA card that has been installed is
not seated properly or is defective. Be sure
that the card is fully inserted, or remove
the PCI or ISA card that was just installed.
Computer does not automatically display
the date and time.
Computer powered-off automatically. The unit temperature may have been
The real-time clock (RTC) battery may need
to be replaced.
exceeded. Check the fan for function and
blockage.
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Page 90
Diskette Drive Problems
Problem Possible Solution
Diskette drive light stays on. Diskette could be installed incorrectly. Remove the
Table 4-3
Solutions for Diskette Drive Problems
diskette and reinsert.
Software program may be damaged. Check the program
diskettes.
Drive button is not pushed in. Push in the drive button.
Drive cable is not properly connected. Reconnect drive
cable.
Diagnostic Tools
4-13
Diskette drive cannot write to
a diskette.
Diskette drive cannot read a
diskette.
A problem has occurred with a
disk transaction.
Non-system disk message Remove the diskette from the drive.
Drive not found Check the cables for loose connections.
Diskette is not formatted. Format the diskette.
Diskette is write-protected. Either use another diskette
that is not write-protected or disable the write protection
on the diskette.
Writing to the wrong drive. Check the drive letter in the
path statement.
Not enough space is left on the diskette. Use another
diskette to write the information.
Diskette write control is disabled. Check the security
feature settings.
Diskette is not formatted. Format the diskette.
Using the wrong diskette type for the drive type. Use a
diskette that is compatible with the drive.
Reading the wrong drive. Check the drive letter in the
path statement.
Diskette drive has been disabled. Run Computer Setup
and enable the diskette drive.
Directory structure is bad or there is a problem with a
file.
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
4-14
Display Problems
Solutions for Display Problems
Problem Possible Solution
Screen is blank. Monitor is not turned on and the monitor
Table 4-4
light is not on. Turn on the monitor and
check that the monitor light is on.
Screen save has been initiated. Press any
key or move the mouse to light the screen.
Wait a few seconds for the screen to
become active.
Check the cable connection from the
monitor to the workstation and check the
grounded AC outlet.
The brightness needs adjusting. Adjust the
brightness control.
The energy saver feature has been
enabled. Press any key or type the
password. Wait a few seconds for the
screen to become active.
The RGB (red, green, blue) input switch on
the back of the monitor is incorrectly set.
Set the monitor Input switch to 75 ohms. If
there is a sync switch, set it to External.
If a fixed-sync monitor is used, be sure that
the monitor can accept the same sweep
rate as the resolution chosen.
Check that the graphics adapter is fully and
properly inserted in the PCI or AGP slot.
Graphics colors are wrong. If the BNC cable is used, make sure that
the red, green, and blue BNC cables are
connected to the corresponding monitor
connectors.
Be sure the monitor RGB inputs are set to
75 ohms.
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continued
Page 92
Table 4-4
Solutions for Display Problems
Problem Possible Solution
continued
Diagnostic Tools
4-15
Characters are dim.
Monitor does not function properly when
used with the energy saver features.
Blurry display or requested resolution
cannot be set.
The picture is broken up; it rolls, jitters, or
blinks.
Adjust the monitor brightness and contrast
controls.
Check that the video cable is securely
connected to the video card and monitor.
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.
If the graphics controller was upgraded,
the correct display drivers may not be
loaded.
Install the correct display drivers on the
diskette included in the upgrade kit.
Be sure the monitor cable is securely
connected to the computer.
In a two-monitor system or if another
monitor is in close proximity, the monitor
may interfere with the magnetic field of
another monitor. Move them farther apart.
Screen goes blank.
Monitor overheats.
Cursor will not move using the arrow keys
on the numeric keypad.
A screen blanking utility may be installed or
energy saver features are enabled. Press
any key or type password. Wait a few
seconds for the screen to become active.
There is not enough ventilation space for
proper airflow. 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
not be on when you want to use the arrow
keys.
key. The Num Lock light should
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
4-16
Printer Problems
Solutions for Printer Problems
Problem Possible Solution
Printer will not print. Printer is not turned on and online. Turn the
Printer will not turn on. The cables may not be connected properly.
Prints garbled information. The correct printer drivers for the
Table 4-5
printer on and be sure it is online.
The correct printer drivers for the
application are not installed. Install the
correct printer drivers for the application.
If the workstation is on a network, the
printer may not be connected to the
network. Make the proper network
connections to the printer.
Reconnect all cables and check the power
cord and grounded AC outlet.
application are not installed. Install the
correct printer driver for the application.
The cables may not be connected properly.
Reconnect all cables.
Printer is off-line.
The printer may be out of paper. Check the
paper tray and refill it if it is empty. Select
online.
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Page 94
Hard Drive Problems
The information provided by the diagnostic test includes error code, system
serial number, drive serial number, drive model, and drive firmware revision.
Specific details of the drive failure are not included.
When you run the diagnostics, the test results are 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.
Hard drive error occurs. Hard disk has bad sectors or has failed.
Disk transaction problem. Either the directory structure is bad or there
Diagnostic Tools
Table 4-6
Hard Drive Problems
Problem Possible Solution
Use a utility to locate and block usage of
bad sectors. If necessary, reformat the
hard disk.
is a problem with a file.
When using Windows NT Workstation 4.0,
run Disk Administrator. At the Start menu,
highlight
Administrative Tools
Programs
and select
.
4-17
Drive not found. Cable could be loose. Check cable
connections.
Check SCSI IDs to make sure they are not
duplicated.
Non-system disk message.
The system is trying to start from a diskette
that is not bootable. Remove the diskette
from the diskette drive.
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.
Diskette boot has been disabled in
Computer Setup. Run Computer Setup and
enable diskette boot.
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
4-18
Hardware Installation Problems
Solutions for Hardware Installation Problems
Problem Possible Solutions
Table 4-7
A new device is not recognized as part of
the computer system.
The Computer Setup utility has not been
run to configure the new device. Run the
Computer Setup utility.
When the system advised you of changes
to the configuration, you did not accept
them. Restart the workstation and follow
the instructions for accepting the changes.
The system may not have automatically
recognized the new device. Run Computer
Setup and identify the new device.
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.
The cables for the new external device are
loose or the power cables are unplugged.
Check all cables.
The power switch for the new external
device is not turned on. Turn off the
workstation, turn on the external device,
then turn on the workstation to integrate
the new device.
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.
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Page 96
DVD-ROM and CD-ROM Drive (IDE) Problems
Table 4-8
DVD-ROM and CD-ROM Drive (IDE) Problems
Problem Possible Solution
Cannot read compact disc. CD is not properly seated in the drive. Eject
the CD, correctly seat it in the drive, then
reload.
CD has been loaded upside down. Eject the
CD, turn the CD over, then reload.
Labels can imbalance a CD, causing an
error.
System will not boot from CD-ROM drive. The CD-ROM boot is not enabled through
the Computer Setup utility. Run the
Computer Setup utility and set the drive
priorities.
Be sure that drive cabling and jumpers are
set correctly.
Diagnostic Tools
4-19
Cannot eject compact disc.
CD-ROM device is not detected; driver is
not loaded.
CD is not properly seated in the drive. Turn
off the 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.
CD-ROM drive is not connected properly.
Open the workstation. Verify that the drive
cable is connected properly.
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Compaq Deskpro Workstation AP250 Maintenance and Service Guide
4-20
Memory Problems
Memory Problems
Table 4-9
Out of memory error. Run Performance Monitor. Click
Memory count during POST is wrong. The Direct RIMMs may not be installed
Insufficient memory error during operation. The system has run out of memory for the
SCSI Problems
Problem
Programs, Administrative Tools
The workstation has run out of memory to
run the application. Check the application
documentation to determine memory
requirements.
correctly. Verify that the Direct RIMMs have
been installed correctly in the RIMM
sockets then run the Computer Setup
utility.
application. Check memory requirements
for the application or install additional
memory.
Possible Solution
.
Table 4-10
SCSI Problems
Problem Cause Solution
Start
,
System will not boot from a
SCSI drive.
The SCSI drive is not
configured correctly.
Be sure that the drive
cabling and jumpers are
set correctly. To boot a
SCSI drive, the drive ID
number must be set to 0.
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Page 98
Network Problems
Table 4-11
Network Problems
Diagnostic Tools
4-21
Problem
System does not
detect a network
controller.
System Setup utility
reports
unprogrammed
EPROM.
Cause
1. Possible driver problem
2. Controller is disabled in
setup
3. Possible failed network
controller
1. The network controller is
defective.
2. Network drivers are not
loaded.
Solution
1. Load the latest
version of Compaq
Workstation SSD for
Windows NT.
2. Run Computer Setup
and enable the
controller.
3. Replace the system
board.
1. Replace the controller
or the system board.
2. Boot the workstation
without the network
drivers, using a
system boot diskette,
and reconfigure the
network controller.
continued
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Page 99
Compaq Deskpro Workstation AP250 Maintenance and Service Guide
4-22
Table 4-11
Network Problems
Problem
continued
Cause
Solution
Diagnostics reports a
failure.
Diagnostics passes,
but the system does
not communicate
with the network.
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
interrupts or memory
overlaps the interrupt or the
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. 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.
5. Run Computer Setup
and modify the
network controller
memory value.
1. Be sure the network
drivers are loaded
and that the driver
parameters match the
configuration of the
network controller.
2. Select the Network
icon in 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
Writer: Bruce Sullivan Project: Compaq Deskpro Workstation AP250 Maintenance and Service Guide Comments:
Compaq Confidential – Need to Know Required
Part Number: 118133-001 File Name: e-ch4 Diagnostic Tools.doc Last Saved On: 10/26/99 3:09 PM
Page 100
Table 4-11
Network Problems
Problem
continued
Cause
Solution
Diagnostic Tools
4-23
Network controller
stopped working
when an expansion
board was installed.
1. Network drivers are not
loaded or driver parameters
do not match the current
configuration.
2. The cable is not securely
connected.
3. The network controller
interrupt or memory
overlaps the interrupt or
memory of another
expansion board.
4. The network controller
requires drivers.
5. The files containing the
network drivers are
corrupted.
1. Be sure 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 the cable is
securely attached to
the network
connector and 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 the
Compaq Restore CD,
then run Computer
Setup.
continued
Writer: Bruce Sullivan Project: Compaq Deskpro Workstation AP250 Maintenance and Service Guide Comments:
Compaq Confidential – Need to Know Required
Part Number: 118133-001 File Name: e-ch4 Diagnostic Tools.doc Last Saved On: 10/26/99 3:09 PM
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