HP ProSignia 500 Compaq ProSignia Family of PC Servers Maintenance and Service
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- HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 1
in accordance with the terms of the agreement. Product names mentioned herein may be trademarks and/or registered trademarks of their respective companies. MAINTENANCE AND SERVICE GUIDE COMPAQ ProSignia Family of PC Servers First Edition (September 1992) Text Number 144257-001 - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 2
Preface This MAINTENANCE AND SERVICE GUIDE is a troubleshooting guide that can be used for reference when servicing COMPAQ ProSignia Family of Personal Computer Servers. Compaq Computer Corporation reserves the right to make changes to the COMPAQ ProSignia PC Servers without notice. Symbols The - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 3
documentation is available to support these products: o Documentation Set o MS-DOS VERSION 5 REFERENCE GUIDE o MS OS/2 STANDARD VERSION 1.2 o TECHNICAL REFERENCE GUIDE o COMPAQ SERVICE QUICK REFERENCE GUIDE o Service Training Guides o COMPAQ SERVICE ADVISORIES AND BULLETINS o COMPAQ QuickFind - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 4
Chapter 1 Illustrated Parts Catalog REFER TO ADDENDUM - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 5
. NOTE: Refer to the support software guide for procedures on using the COMPAQ System Configuration utility when installing or removing expansion boards, mass storage devices, and Extended Industry Standard Architecture (EISA) options. To service the COMPAQ ProSignia Personal Computer System, you - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 6
. REMOVAL AND REPLACEMENT PROCEDURES Side Access Door/Front Bezel WARNING High voltage present. Extreme care must be taken when running the COMPAQ ProSignia PC Server without the system unit cover on 1. Loosen thumb screws (3) on back bezel. 2. Slide side access door back and then out. 3. Remove - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 7
Torx T-15 screws (4) at back panel. 3. Slide system unit cover backward and then up. 4. Reverse steps for replacing system unit cover. Mass Storage Devices The COMPAQ ProSignia PC Server contains two areas for mass storage devices: the removable media area and the side access drive bays. - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 8
Figure 2-3 shows the Removable Media Bays are located at the top of the unit in the front panel. Table 2-1 shows the supported mass storage devices and locations for the removable media bays. Table 2-1. Removable Media Bay Configurations Mass Storage Device Storage Bays 7 6 5 4 1.44 - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 9
1. Remove side access door and front bezel. 2. Disconnect power and signal cables from rear of drive. 3. Remove retaining screws (2). 4. Slide mass storage device out. 5. Reverse steps for installation. Cable Folding Diagrams for Removable Media Bays - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 10
Side Access Drive Bays The side access drive bay area is located behind the side access door and can hold up to four half height snap-in hard drives. 1. Disconnect power and signal cables. 2. Remove hard drives by squeezing drive retaining clips and sliding drives out. 3. Reverse order for - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 11
- HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 12
- HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 13
Cable Folding Diagrams for IDE Drives Cable Folding Diagrams for IDA-2 Drives - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 14
Boards Memory The COMPAQ ProSignia PC Server comes standard with either 4 or 8 megabytes of 32-Megabyte industry-standard SIMM modules in the four SIMM sockets on the system board. NOTE: The COMPAQ ProSignia supports a maximum of 128 MB of system RAM. The standard 4 or 8 megabytes of system board - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 15
EISA Configuration utility if installed memory size has changed. Table 2-2 shows a sample of typical memory configurations for the COMPAQ ProSignia PC Server. Table 2-2. Example of SIMM Upgrade Combinations Total Memory Standard SIMM SIMM SIMM SIMM System Socket 1 Socket 2 Socket - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 16
116 MB 4 MB 32-MB 32-MB 32-MB 16-MB 128 MB 4 MB * 32-MB 32-MB 32-MB 32-MB 12 MB 8 MB 4-MB 16 MB 8 MB 8-MB 24 MB 8 MB 16-MB 36 MB 8 MB 16 MB 8-MB 4-MB 40 MB 8 MB 32-MB 56 MB 8 MB 32-MB 16-MB 64 MB 8 MB 32-MB 16-MB 8-MB 72 MB 8 MB 32-MB 32-MB 88 MB 8 MB - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 17
1. Remove all expansion boards. 2. Disconnect all cables from system board (Refer to Figure 2-16). 3. Remove retaining screws (8). 4. Lift board out being careful to avoid chassis and loose cables. 5. Reverse order to replace system board. MISCELLANEOUS PARTS - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 18
dispose of in fire or heat above 90oC, incinerate, or expose to water or fire. Use only replacement battery/clock modules supplied by Compaq Computer Corporation (part no. 107872-001). Disposal of the battery/clock module should be accomplished within compliance of local regulations or returned to - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 19
1. Turn power off and remove power cord from rear of unit. 2. Remove side access panel/front bezel/system unit cover. 3. Disconnect all power connectors from boards and or peripheral devices. 4. Remove front power switch bracket retaining screws (2). 5. Pull bracket out and remove power switch, - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 20
- HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 21
, follow the instructions in Table 3-1. The error messages and codes listed in Table 3-1 include all codes generated by COMPAQ products. Your Problem A Critical Error occurred A catastrophic system Run Diagnostics. prior to this power-on error, which caused Replace failed assembly the server - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 22
or, contact your service provider. 102-System Board Failure DMA, timers, etc. Replace the system board. Run the COMPAQ EISA Configuration Utility. 162 necessary. Error Code Probable Source Action of Problem 172-EISA Configuration Nonvolatile Run the EISA Nonvolatile - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 23
Cache Controller Error controller or RAM board in the slot failure. indicated. Error Code Probable Source Action of Problem 207-Invalid Memory Memory module Verify placement of Configuration installed incorrectly. memory modules. 208-Invalid Memory Speed The speed - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 24
Controller System board, Check with your Error keyboard, or mouse Authorized COMPAQ controller failure. Reseller. 304-Keyboard or System Keyboard, keyboard 1. Make X Error Code Probable Source Action of Problem 402-Monochrome Adapter Monochrome display Replace the - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 25
are assigned to COM2. and correct. Error Code Probable Source Action of Problem 1153-COM Port 3 Both external and Run the EISA internal serial failed. Replace failed assembly as indicated or, contact your service provider. 1771-Primary Disk Port Internal and external Run the - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 26
-Disk 0 Failure Hard drive/format Run Diagnostics. error. Replace failed assembly as indicated or, contact your service provider. Error Code Probable Source Action of Problem 1781-Disk 1 Failure Hard drive/format Run Diagnostics. error. Replace failed assembly as indicated or - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 27
reminds you cables. Drive X that drive X is defective and fault tolerance is being used. Error Code Probable Source Action of Problem 1788-Slot # Drive Drives are not Reinstall the drives Array Reports Incorrect installed in their correctly as indicated. Drive Replacement - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 28
wrong drive type. Configuration Utility and Diagnostics and correct. Error Code Probable Source Action of Problem 1792-Slot # Drive Array This indicates that No action necessary; - Valid Data Found in while the system was no data has been lost. Array Accelerator. - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 29
COMPAQ IDA-2 without the Array Accelerator. Error Code Probable Source Action of Problem Disk Parameter Extended BIOS data Contact your service Table or BIOS Error. area being corrupted . Configuration Utility. 1600-32-Bit Server Server Manager/R board Run Diagnostics. Manager/R - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 30
, the Recommended Action column lists the steps necessary to correct the problem. After completing each step, run the Diagnostics program to verify whether switch on the system board. 6. Install an Ethernet loopback plug when instructed to by Diagnostics utility. (part no. 142054-001) 7. Run the - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 31
master test failed 105-xx Port 61 error 106-xx Keyboard controller self-test failed 107-xx CMOS RAM test failed The following steps apply to error codes 107-xx through 109-xx. 108-xx CMOS interrupt test 1. Replace the battery/clock module failed and retest. 2. Replace the system board - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 32
failed codes 201-xx and 202-xx: 1. Replace the system ROM and retest. 202-xx Memory system ROM 2. Replace the processor board and checksum failed retest. 3. Replace the memory expansion board and retest. 203-xx Memory write/read test The following steps apply to error failed codes - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 33
Error Description Recommended Action Code 501-xx Video controller test The following steps apply to error failed codes 501-xx through 516-xx: 1. Replace the monitor and retest. 502-xx Video memory test failed 2. Replace the Advanced VGA board and retest. 503-xx Video attribute test - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 34
603-xx Diskette write/read/ compute test failed 4. Replace the system board and retest. 604-xx Diskette random seek test failed 605-xx Diskette ID media failed 606-xx Diskette speed test failed 607-xx Diskette wrap test failed 608-xx Diskette write protect test failed 609-xx Diskette reset - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 35
Error Description Recommended Action Code 1101-xx Serial port test failed The following steps apply to error codes 1101-xx through 1109-xx: 1109-xx Clock register test 1. Check the switch settings on the failed Serial/Parallel Interface board (if applicable). 2. Replace the Serial/ - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 36
1708-xx Fixed disk format bad track test failed 1709-xx Fixed disk reset controller test failed 1710-xx Fixed disk park head test failed 1715-xx Fixed disk head select test failed 1716-xx Fixed disk conditional format test failed 1717-xx Fixed disk ECC * test failed 1719-xx Fixed disk power mode - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 37
1901-xx Tape servo write failed 1. Replace the tape cartridge and retest. 1902-xx Tape format failed 2. Check and/or replace the signal cable and retest. 1903-xx Tape drive sensor test 3. Check the switch settings on the failed adapter board (if applicable). 4. Replace the tape adapter - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 38
2417-xx Lightpen text mode test failed, no response 2418-xx ECG/VGC memory test failed 2419-xx ECG/VGC ROM checksum test failed 2420-xx ECG/VGC attribute test failed Error Description Recommended Action Code 2421-xx ECG/VGC 640 x 200 graphics The following steps apply to error mode - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 39
card External failed 6089-xx Network card Open failed MAU = Multistation Access Unit # UTP/STP = Unshielded Twisted Pair/Shielded Twisted Pair Table 3-16. Server Manager/R Board Test Error Codes Error Description Recommended Action Code 7000-11 Processor (80186 Timer) Replace the - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 40
mdm_ext_int 7000-57 mdm\c\analog 7000-61 Voice/DTMF Internal Replace the Server Manager/R board Loopback Voice ROM for 7000-61 and 7000-62 error 62 Voice/DTMF Internal Loopback 7000-78 Host ADC Measurements Replace the Server Manager/R board battery for 7000-78 and 7000-79 7000-79 - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 41
-2 (IDA-2), or COMPAQ 32-Bit IDA Expansion Controller. The two main functions of DAAD are to collect all possible information about the array controllers in the system and to offer a list of all detected problems. NOTE: Refer to the Drive Array - Advanced Diagnostics User Guide for complete details - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 42
Drive Array - Advanced Diagnostics User Guide for descriptions of the DAAD screens. troubleshooting routine. To view the problems detected by DAAD, select the Diagnosis button. If DAAD found no problems, a message, "No Problems You may need to run the COMPAQ EISA Configuration Utility and disable the - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 43
accelerator board that DAAD does not recognize. Call your Authorized COMPAQ Reseller for the latest copy of DAAD. Accelerator status: No action needs to be taken. Accelerator status: Warranty alert A catastrophic problem has occurred with the array accelerator board. Refer to the other messages - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 44
nonvolatile RAM to reflect the removal or new position. Compatibility port problem detected You have the compatibility port configured for this IDA controller. When DAAD was verifying this interface, a serious problem was detected. A hardware problem has occurred and you should replace the IDA - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 45
controller. Refer to Chapter 4 of this guide for a complete description of the indicator definitions greater than 1.26. Call your Authorized COMPAQ Reseller to obtain the latest firmware. Controller you change drive locations, there may be a problem with the placement of the drives. DAAD examines - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 46
device driver. Restart problem such as drive time-out, or was unable to get the data due to these features not being supported supports monitor and performance, if desired. Drive Monitoring is NOT enabled for drive bay X The monitor and performance features have not been enabled. Run the COMPAQ - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 47
drive is below the latest recommended version. Call your Authorized COMPAQ Reseller to obtain the latest upgraded firmware. Drive (bay) and place it in drive position Y. Rearrange the drives according to the DAAD instructions. Drive (bay) X RIS copy mismatch The copies of the RIS on this - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 48
multiple errors, this drive may need to be replaced. FYI: Drive (bay) X is non-Compaq supplied The installed drive was not supplied by Compaq. If problems exist with this drive, replace it with a COMPAQ drive. Identify controller data did not match with CMOS The identify controller data from the - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 49
recovery mode and is vulnerable. Replace the failed drive as soon as possible. Logical Drive X status = LOOSE CABLE DETECTED A physical drive has a cabling problem. Turn the system off and attempt to reattach the cable onto the drive. If this does not work, replace the cable. Logical Drive - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 50
Logical Drive X status = RECOVERING A physical drive in this logical drive has failed and has now been replaced. The replaced drive is rebuilding from the mirror drive or the parity data. Nothing needs to be done. Normal operations can occur. Logical Drive X status = WRONG DRIVE REPLACED A - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 51
the array accelerator board. Soft Firmware Upgrade required DAAD has determined that your controller is running firmware that has been soft upgraded by the COMPAQ Upgrade Utility. However, the firmware running is not present on all drives. This could be caused by the addition of new drives in the - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 52
COMPAQ to be replaced. Run the COMPAQ Diagnostics Utility to determine if the recognize. Call your Authorized COMPAQ Reseller for the latest error messages for an indication of the problem. Wrong Accelerator This could mean that either SERVICES The COMPAQ ProSignia provides rapid recovery services - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 53
Files NOTE: Please refer to the COMPAQ ProSignia User's Reference Guide for complete details and procedures about this diagnostic tool. Automatic Server Recovery The Automatic Server Recovery (ASR) feature can be optionally enabled to restart a PC Server after a critical hardware or software error - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 54
Server to recover from critical system faults. This selection process is accomplished through the COMPAQ EISA Configuration Utility. The ASR depends on an operating system driver PC Server will restart successfully, making this the ideal choice for remote locations where trained service personnel - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 55
be required, and functionality may be reduced. ASR Security The standard COMPAQ ProSignia security password features function differently during Automatic Server Recovery than during a typical system startup. During ASR the PC Server will not prompt for the Power-On Password. This allows the ASR - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 56
problem, minimizing downtime. The log can be viewed through Inspect Utility, Diagnostics Utility, or the optional INSIGHT Manager and Server memory following a reset due to the Automatic Recovery Services (ASR) Timer expiration. Automatic Server Recovery The system detected a data error in - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 57
. Revision History Table Some errors can be resolved by reviewing changes to the COMPAQ ProSignia configuration. The PC Server has an Automatic Revision Tracking (ART) feature that helps you review recent changes to the PC Server's configuration. One ART feature is the Revision History Table - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 58
History Files are a part of the ART feature that allow you to review modifications to the system configuration. If a change has been made to the the EISA Configuration Utility. ROMPaq The use of flash ROMs in the COMPAQ ProLinea allows the firmware (BIOS) to be upgraded with the software utility - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 59
TO ADDENDUM This chapter provides switch and jumper information for the COMPAQ ProSignia PC Server. SYSTEM BOARD Switch locations on the system board are shown in switch settings for SW4 must be changed. The settings for supported processors are defined in Table 4-1. Table 4-1. Processor Switch - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 60
settings for each SCSI ID and its recommended drive bay. Figure 4-2 shows the physical locations of jumpers ID2, ID1, and ID0 on supported options. Table 4-3. Jumper Settings For SCSI ID Device in Drive Bay SCSI ID ID2 ID1 ID0 7 N/A N/A N/A N/A 6 6 ON ON OFF 5 5 ON OFF - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 61
COMPAQ 32-BIT NETFLEX CONTROLLER The COMPAQ 32-Bit NetFlex Controller has one jumper block which selects between Ethernet or Token Ring. - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 62
- HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 63
-30oC to 60oC Relative Humidity (noncondensing) Operating 20% to 80% 20% to 80% Nonoperating 5% to 90% 5% to 90% Table 5-2. Power Supply Specifications Input Specifications Nominal Line Voltage 100 to 120 VAC 220 to 240 VAC Range Input Line 90 to 132 VAC 180 to 270 VAC - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 64
80 A at 264 VAC (cold start) Holdup Time 20 ms from zero 20 ms from zero crossing at 120 VAC crossing at 120 VAC General Specifications Full Output Rating To 40oC and 5,000 ft To 32oC and 10,000 ft (derate linearly) Minimum Load 4.5 A on + %V Output; .04 A on 12V output Ambient - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 65
chips. SIMM modules that use 4-megabit DRAM chips are not supported. # The COMPAQ ProSignia supports a maximum of 128 MB of system RAM. The standard 4 Rotation (rpm) 300 360 Transfer Rate bits/sec (high/low) 500 K/250 K 500 K/300 K Bytes/Sector 512 512 Sectors/Track (high/low) - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 66
12 12 16 Table 5-6. Drive Array Specifications 1020-MB Arrays 680-MB Arrays 4 4 Average Data Service Rate (Requests/sec) 120 119 Table 5-7. COMPAQ 32-Bit Intelligent Drive Buffer 128-Kbyte 25-ns static RAM Drives Supported Up to six (three drive array pairs) - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 67
ms 14 ms Rotation Speed 5400 RPM 5400 RPM 4400 RPM Table 5-9. COMPAQ 32-Bit Fast-SCSI-2 Controller Dimensions: Height 4.5 in 11.43 cm in 26.67 cm Total Weight 7.13 oz 205 g Drives Supported Seven Data Transfer Method 32-bit bus master SCSI Bus Transfer Rate - HP ProSignia 500 | Compaq ProSignia Family of PC Servers Maintenance and Service - Page 68
bus master Maximum Transfer Rate on EISA Bus 33 MB/s Standard Network Controller Configuration - Ethernet Interface: Meets IEEE 802.3 Specifications Supports AUI (DB-15) Supports 10Base-T (RJ-45) Optional Network Controller Configuration - Token Ring Interface: Meets IEEE 802
Notice
The information in this guide is subject to change without notice.
Compaq Computer Corporation shall not be liable for technical or editorial
errors or omissions contained herein; nor for incidental or consequential
damages resulting from the furnishing, performance, or use of this
material.
This guide contains information protected by copyright. No part of this
guide may be photocopied or reproduced in any form without prior written
consent from Compaq Computer Corporation.
Copyright 1992 Compaq Computer Corporation.
All rights reserved. Printed in the U.S.A.
COMPAQ, SYSTEMPRO, FASTART
Registered U.S. Patent and Trademark Office.
ProSignia and QVision are trademarks of Compaq Computer Corporation.
The software described in this guide is furnished under a license agreement
or nondisclosure agreement. The software may be used or copied only in
accordance with the terms of the agreement.
Product names mentioned herein may be trademarks and/or registered
trademarks of their respective companies.
MAINTENANCE AND SERVICE GUIDE
COMPAQ ProSignia Family of PC Servers
First Edition (September 1992)
Text Number 144257-001