Page 1
Foreword
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 1987, 1989 Compaq Computer Corporation.
All rights reserved. Printed in the USA.
COMPAQ, COMPAQ PORTABLE III, and COMPAQ PORTABLE 386, 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.
Microsoft, MS, and MS-DOS are trademarks of Microsoft Corporation.
Product names mentioned herein are for identification purposes only and may be
trademarks and/or registered trademarks of their respective companies.
COMPAQ PORTABLE 386 PERSONAL COMPUTER
MAINTENANCE AND SERVICE GUIDE
Second Edition (August 1989)
First Edition (September 1987)
Assy No. 107536-002
Binder Number 197537-001
Text Number 107538-002
Compaq Computer Corporation requires that all peripheral devices be connected
to this computer/product via shielded cables with metal RFI/EMI connector
hoods.
==============================================================================
WIRE TYPE: Multipaired, overall shielded; Belden #98XX; Alpha #54XX;
or equivalent.
CONNECTOR HOOD: RFI/EMI metal shield; AMP #74517X-X; or equivalent.
==============================================================================
It is important that the chassis ground strap of the peripheral device be
connected to the computer chassis. An Alpha #1221 flat braided strap is
sufficient. The strap is not necessary if a shielded cable connects the two
chassis.
COMPAQ PORTABLE 386 PERSONAL COMPUTER MAINTENANCE AND SERVICE GUIDE is a
troubleshooting guide that can be used as a reference when servicing the
COMPAQ PORTABLE 386 Personal Computer. Compaq Computer Corporation reserves
Page 2
the right to make changes in its COMPAQ PORTABLE 386 Personal Computer without
notice. Accordingly, the diagrams and procedures in this document may not
apply to the computer you are servicing.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
CAUTION
Only trained technicians should attempt to repair this equipment. All
troubleshooting and repair procedures are detailed to allow subassembly/module
level repair only. Because of the complexity of the individual boards and
subassemblies, no one should attempt to make repairs at the component level or
make modifications to any printed wiring board. Improper repairs may create a
safety hazard. Indications of component replacement or printed wiring board
modifications may void any warranty or exchange allowances.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
CAUTION
For proper ventilation of your system, you must provide at least 3 inches
(8 cm) of clearance on all sides of the computer, except underneath.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Page 3
Chapter 1. Introduction
Chapter 1.1 Summary of Text
This guide contains ten chapters which are summarized below:
Chapter 1. INTRODUCTION provides a brief summary of the contents of each
chapter in the guide, a list of needed tools and supplies, and a
list of additional reference documents.
Chapter 2. OPERATING AND PERFORMANCE SPECIFICATIONS provides operating and
performance specifications for the COMPAQ PORTABLE 386 Personal
Computer.
Chapter 3. POWER ON SELF TEST (POST)/PROBLEM ISOLATION describes the internal
system diagnostic programs that are automatically executed when
you power on the system. This chapter also provides a flowchart
for identifying and correcting problems that can occur with the
COMPAQ PORTABLE 386 Personal Computer during the Power On Self
Test procedure.
Chapter 4. SETUP AND INSPECT (See SUPPORT SOFTWARE MAINTENANCE AND SERVICE
GUIDE.)
Chapter 5. DIAGNOSTICS PROGRAM (See SUPPORT SOFTWARE MAINTENANCE AND SERVICE
GUIDE.)
Chapter 6. ERROR MESSAGES AND CODES lists the Power On Self Test and
DIAGNOSTICS Error Codes. This chapter also provides a required
course of action to resolve the problem described by each error
code.
Chapter 7. ILLUSTRATED PARTS CATALOG provides an illustrated reference for
specific COMPAQ PORTABLE 386 Personal Computer Spare Part Kit
Numbers.
Chapter 8. REMOVAL AND REPLACEMENT PROCEDURES describes how to remove and
replace field subassemblies for the COMPAQ PORTABLE 386 Personal
Computer.
Chapter 9. JUMPER AND SWITCH SETTINGS provides detailed information for
setting jumpers and switches.
Chapter 10. MASS STORAGE CONFIGURATIONS provides information on the
mass storage capabilities of the 300/600 Megabyte Fixed Disk
Drive Expansion Unit.
Chapter 1.2 Required Tools and Supplies
To service the COMPAQ PORTABLE 386 Personal Computer, you need the following
tools:
o Torx T-10 Screwdriver
o Torx T-15 Screwdriver
Page 4
o Torx Angle T-15 Screwdriver
o 3/16 Inch Open End Wrench
o Integrated Circuit (IC) Removal Tool
o Integrated Circuit (IC) Insertion Tool
o Modem Terminating Plug
o DIAGNOSTICS Program
o Parallel Interface Loopback Plug
o Serial Interface Loopback Plug
Chapter 1.3 Additional Reference Information
The following documentation and related software are available to support
these and other COMPAQ computer products:
o COMPAQ PORTABLE 386 PERSONAL COMPUTER OPERATIONS GUIDE (PN 107918-001)
o COMPAQ PORTABLE 386 PERSONAL COMPUTER TECHNICAL REFERENCE GUIDE
(PN 107920-001)
o COMPAQ PORTABLE 386 PERSONAL COMPUTER MEMORY EXPANSION INSTALLATION GUIDE
(PN 107530-002)
o Installation Guides for COMPAQ Portable Computers with Plasma Displays
Mass Storage Devices (PN 107320-003)
Expansion Unit (PN 107323-003)
COMPAQ Internal Modems (PN 107325-002)
40 Megabyte Tape Drive Expansion Unit (PN 107532-002)
Second Serial Board for International Only (PN 107533-001)
o Other Installation Guides
20 MHz 80387 Coprocessor (PN 113165-002)
COMPAQ Color Monitor (PN 106223-001)
300/600 MEGABYTE FIXED DISK DRIVE EXPANSION UNIT INSTALLATION AND
OPERATIONS GUIDE (PN 115835-002)
o COMPAQ ENHANCED COLOR GRAPHICS BOARD INSTALLATION AND OPERATIONS GUIDE
(PN 106540-001)
o COMPAQ ENHANCED COLOR GRAPHICS BOARD/COMPAQ COLOR MONITOR TECHNICAL
REFERENCE GUIDE (PN 106733-001)
o Information Cards
Desktop Pedestal for COMPAQ Personal Computers with Dual Mode Plasma
Displays (PN 107326-002)
Carrying Case for COMPAQ Personal Computers with Dual Mode Plasma
Displays (PN 107327-002)
Page 5
o MS-DOS Version 4 Software and Documentation (PN 114493-001 and
PN 114496-001)
o MS-DOS VERSION 3 REFERENCE GUIDE (PN 114024-001)
o BASIC VERSION 3 REFERENCE GUIDE (PN 104030-001)
o MICROSOFT Operating System/2 Standard Version 1.1
o Service Advisories and Bulletins
o HOW TO DO BUSINESS WITH COMPAQ SERVICE
o COMPAQ SERVICE QUICK REFERENCE GUIDE (PN 106854-001)
Page 6
Chapter 2. Operating and Performance Specifications
Chapter 2.1 Introduction
This chapter provides operating and performance specifications for the
COMPAQ PORTABLE 386 Personal Computer (Figure 2-1).
Chapter 2.2 System Unit
Table 2-1 lists the electrical and mechanical specifications for the COMPAQ
PORTABLE 386 Personal Computer system unit.
Table 2-1. Electrical and Mechanical Specifications
==============================================================================
Dimensions:
Height 9.8 in. (24.8 cm)
Depth 7.8 in. (19.8 cm)
Width 16.0 in. (40.6 cm)
-----------------------------------------------------------------------------Weight:
Model 40 20 lb (9.1 kg)
Model 100 21 lb (9.5 kg)
Model 110 21 lb (9.5 kg)
-----------------------------------------------------------------------------Power Requirements: Domestic International
Nominal Line Voltage 120 VAC 230 VAC
Range Line Voltage 102 VAC to 132 VAC 204 VAC to 264 VAC
Line Frequency 60 Hz 50 Hz
Current 3A 2A
-------- -------------
Page 7
-----------------------------------------------------------------------------AC Power Cord:
Length 6 ft (1.8 m)
Gauge 18 AWG
-----------------------------------------------------------------------------Environmental Requirements:
Temperature:
Operating 50oF to 104oF (10oC to 40oC)
Nonoperating 14oF to 122oF (-10oC to 50oC)
Shipping -22oF to 140oF (-30oC to 60oC)
-----------------------------------------------------------------------------Humidity:
Operating 20% to 80% noncondensing
Nonoperating Not less than 5% nor more than 90% noncondensing
-----------------------------------------------------------------------------Shock and Vibrations:
Shock 5 g, 11 ms, half sine (operating)
40 g 11 ms, half sine (nonoperating)
Vibration 1.0 g, 5 to 500 Hz (nonoperating)
0.15 g, 5 to 500 Hz (operating)
-----------------------------------------------------------------------------Heat Dissipation:
Minimum Configuration 35 watts 119.5 BTU/hr
Maximum Configuration 145 watts 495.1 BTU/hr
-----------------------------------------------------------------------------Maximum Unpressured Altitude:
Operating 10,000 ft (3000 m)
Nonoperating 30,000 ft (9100 m)
==============================================================================
Chapter 2.3 Portable Enhanced Keyboard
Table 2-2 lists the specifications for the portable enhanced keyboard.
Table 2-2. Keyboard Assembly Specifications
==============================================================================
Dimensions:
Height 1.2 in. ( 3.0 cm)
Depth 7.1 in. (18.0 cm)
Width 15.8 in. (40.1 cm)
Cable Length:
Compressed 8.0 in. (20.3 cm)
Extended 30.0 in. (76.2 cm)
Coil Diameter 0.6 in. (1.5 cm)
Interface Industry standard 5 pin
circular DIN type connector
==============================================================================
Chapter 2.4 Compaq Dual Mode Plasma Display
Table 2-3 lists the specifications for the COMPAQ Dual Mode Plasma Display.
Page 8
Table 2-3. COMPAQ Dual Mode Plasma Display Specifications
==============================================================================
Viewing Area Dimensions:
Height 5.2 in. (13.2 cm)
Width 8.3 in. (21.1 cm)
Diagonal 10.0 in. (25.4 cm)
Weight 2.0 lb. (0.9 kg)
Graphic Resolution 640 x 400
640 x 200
320 x 200
Text Resolution 640 x 400 (80 characters x 25 lines)
==============================================================================
Chapter 2.5 1.2 Megabyte Diskette Drive
Table 2-4 lists specifications for the 1.2 megabyte diskette drive.
Table 2-4. 1.2 Megabyte Diskette Drive Specifications
==============================================================================
Dimensions:
Height 1.1 in. (2.8 cm)
Depth 8.0 in. (20.3 cm)
Width 5.8 in. (14.6 cm)
Weight 1.9 lb (0.9 kg)
Media:
Tracks per Inch 96 (1.2 megabyte format)
Number of Tracks 80 (1.2 megabyte format)
Data Transfer Rate 500 Kb/s (1.2 megabyte format)
==============================================================================
48 (360 Kbyte format)
40 (360 Kbyte format)
300 Kb/s (360 Kbyte format)
Chapter 2.6 360 KByte Diskette Drive
Table 2-5 lists the specifications for the 360 Kbyte diskette drive.
Table 2-5. 360 Kbyte Diskette Drive Specifications
==============================================================================
Dimensions:
Height 1.1 in. (2.8 cm)
Depth 8.0 in. (20.3 cm)
Width 5.8 in. (14.6 cm)
Weight 1.9 lb (0.9 kg)
Media:
Page 9
Tracks per Inch 48
Number of Tracks 40
Data Transfer Rate 250 Kb/s
==============================================================================
Chapter 2.7 3 1/2 Inch 1.44 Megabyte Diskette Drive
Table 2-6 lists the specifications for the 3 1/2 inch 1.44 megabyte diskette
drive.
Table 2-6. 3 1/2 Inch 1.44 Megabyte Diskette Drive
==============================================================================
Dimensions:
Height 1.00 in. (2.5 cm)
Depth 5.91 in. (15.0 cm)
Width 4.00 in. (10.2 cm)
Weight 1.00 lb (0.45 kg)
Media: 3 1/2 inch 1.44 megabyte double sided diskette;
dual density (720 Kbyte format); high density
(1.44 megabyte format)
Tracks per Inch 135
Number of Tracks 160
Data Transfer Rate 250 Kb/s (1.44 megabyte format)
500 Kb/s (720 Kbyte format)
Average Access Time 100 ms
Rotational Speed 300 rpm
Motor Start Time 800 ms
Sectors per Track 18 (1.44 megabyte format)
9 (720 Kbyte format)
Bytes per Sector 512
==============================================================================
Chapter 2.8 40 Megabyte Fixed Disk Drive
Table 2-7 lists the specifications for the 40 megabyte fixed disk drive.
Table 2-7. 40 Megabyte Fixed Disk Drive Specifications
==============================================================================
Dimensions:
Height 1.5 in. (3.8 cm)
Depth 4.0 in. (10.2 cm)
Width 5.8 in. (14.6 cm)
Weight 1.9 lb (0.9 kg)
Page 10
Drive Type
(used in SETUP program) 17 or 43
Media:
Number of Surfaces 4
Tracks per Surface 805
Number of Logical Data Heads 5
Number of Logical Cylinders 980
Average Access Time less than 30 ms
Data Transfer Rate 8 Mb/s
Interleave 1:1 for Drive Type 43
3:1 for Drive Type 17
==============================================================================
Chapter 2.9 100 Megabyte Fixed Disk Drive
Table 2-8 lists the specifications for the 100 megabyte fixed disk drive.
Table 2-8. 100 Megabyte Fixed Disk Drive Specifications
==============================================================================
Dimensions:
Height 1.6 in. (3.8 cm)
Depth 5.8 in. (14.6 cm)
Width 4.0 in. (10.2 cm)
Weight 2.9 lb. (1.9 kg)
Drive Type
(used in SETUP program) 45
Media:
Number of Surfaces 8
Tracks per Surface 748
Number of Logical Data Heads 8
Number of Logical Cylinders 748
Average Access Time less than 25 ms
Data Transfer Rate 10 Mb/s
Interleave 3:1
==============================================================================
Chapter 2.10 110 Megabyte Fixed Disk Drive
Page 11
Table 2-9 lists the specifications for the 110 megabyte fixed disk drive.
Table 2-9. 110 Megabyte Fixed Disk Drive Specifications
==============================================================================
Dimensions:
Height 1.62 in. (4.1 cm)
Depth 5.75 in. (14.6 cm)
Width 4.00 in. (10.2 cm)
Weight 1.8 lb (0.81 kg)
Drive Type 33
(Used in SETUP program)
Number of Logical Data Heads 8
Number of Logical Cylinders 832
Average Access Time less than 25 ms
Data Transfer Rate 10 Mb/s
Sectors per Track 33
Interleave 1:1
==============================================================================
Chapter 2.11 Compaq 1200 Baud Internal Modem
Table 2-10 lists the specifications for the COMPAQ 1200 Baud Internal Modem,
which is Hayes compatible.
Table 2-10. COMPAQ 1200 Baud Internal Modem Specifications
==============================================================================
Dimensions:
Height 3.4 in. (8.6 cm)
Depth 0.7 in. (1.9 cm)
Width 5.4 in. (13.7 cm)
Type Bell 103J protocol at 300 baud
Bell 212A and CCITT V.22 protocols at 1200 baud
-----------------------------------------------------------------------------International modem specifications available locally.
==============================================================================
Chapter 2.12 Compaq 2400 Baud Internal Modem
Table 2-11 lists the specifications for the COMPAQ 2400 Baud Internal Modem,
which is compatible with the Hayes command set for asynchronous modems.
Table 2-11. COMPAQ 2400 Baud Internal Modem Specifications
Page 12
==============================================================================
Dimensions:
Height 3.4 in. (8.6 cm)
Depth 0.7 in. (1.9 cm)
Width 5.4 in. (13.7 cm)
Type Bell 103J and CCITT V.21 protocol at 300 baud
Bell 212A and CCITT V.22 protocols at 1200 baud
CCITT V.22bis protocol at 2400 baud
-----------------------------------------------------------------------------International modem specifications available locally.
==============================================================================
Chapter 2.13 Expansion Unit
Table 2-12 lists the specifications for the expansion unit.
Table 2-12. Expansion Unit Specifications
==============================================================================
Dimensions:
Height 6.0 in. (15.2 cm)
Depth 2.4 in. (6.1 cm)
Width 14.5 in. (36.8 cm)
Slots Two 8/16 bit slots *
-----------------------------------------------------------------------------* Fully skirted 8 bit expansion boards will not fit.
==============================================================================
Chapter 2.14 40 Megabyte Tape Drive Expansion Unit
Table 2-13 lists the specifications for the 40 megabyte tape drive expansion
unit.
Table 2-13. 40 Megabyte Tape Drive Expansion Unit Specifications
==============================================================================
Dimensions:
Height 6.0 in. (15.2 cm)
Depth 2.4 in. (6.1 cm)
Width 14.5 in. (36.8 cm)
Media:
Tracks per Inch 83
Number of Tracks 20
Data Transfer Rate 500 Kb/s
==============================================================================
Chapter 2.15 Power Supply
Table 2-14 lists the specifications for the power supply.
Page 13
Table 2-14. Power Supply Specifications
==============================================================================
Input Requirements:
Line Voltage 120/230
Line Fuse 3A at 120, 2A at 230
Line Frequency 47/62 Hz
-----------------------------------------------------------------------------Power:
Steady State 165 watts
Peak State 180 watts
-----------------------------------------------------------------------------Cooling Forced air via 12 VDC fan
-----------------------------------------------------------------------------VDC Output:
Nominal
Continuous Maximum
Nominal Current Current Peak Regulation
Voltage Minimum Maximum Current Tolerance
-----------------------------------------------------------------------------+5.0 VDC 3.0A 14.3A 3%
+12.0 VDC 1.0A 3.0A 5.0A 5%
-12.0 VDC 0.0 0.56A 1.0A 5%
+200.0 VDCI 0.0 0.16A ñ 5 VDC
5.0 VDCI 0.0 0.06A 5%
-----------------------------------------------------------------------------NOTE: These values are maximum values based on nominal operating conditions
for temperature, line voltage, frequency, and altitude. Also, a minimum load
of +12 VDC must be maintained for proper power supply operation.
==============================================================================
Chapter 2.16 300/600 Megabyte Fixed Disk Drive Expansion Unit
Table 2-15 lists the specifications for the 300/600 Megabyte Fixed Disk Drive
Expansion Unit.
Table 2-15. 300/600 Megabyte Fixed Disk Drive Expansion Unit Specifications
==============================================================================
Dimensions:
Height 6.4 in. (16.1 cm)
Depth 16.5 in. (41.9 cm)
Width 14.5 in. (35.9 cm)
-----------------------------------------------------------------------------Weight:
300 Megabyte Unit 27.5 lb (12.4 kg)
600 Megabyte Unit 35.5 lb (15.9 kg)
-----------------------------------------------------------------------------Environmental Requirements:
Temperature:
Operating Not less than 50oF or more than 104oF
(10oC to 40oC)
Nonoperating Not less than 50oF or more than 104oF
(10oC to 40oC)
Shipping Not less than -22oF or more than 140oF
(-30oC to 60oC)
Humidity:
Operating Not less than 20% or more than 80%
Page 14
(noncondensing)
Nonoperating Not less than 5% or more than 90% (noncondensing)
-----------------------------------------------------------------------------Controller 1:1 interleave buffered ESDI external fixed disk
drive controller board installs in one 8/16 bit
expansion slot in the system unit.
-----------------------------------------------------------------------------External Interface
Adapter External interface adapter supports one or two
300 megabyte fixed disk drives
-----------------------------------------------------------------------------LED Indicator Green
-----------------------------------------------------------------------------Power Requirements: U.S. International
---- ------------Nominal Line Voltage 120 VAC, 60 Hz 230 VAC, 50 Hz
Range Line Voltage 102 VAC to 132 VAC 204 VAC to 264 VAC
Line Frequency 47 to 63 Hz 47 to 63 Hz
-----------------------------------------------------------------------------Power 192 watts (steady state)
220 watts (peak power)
-----------------------------------------------------------------------------Current 5A (fuse rating) 4A (fuse rating)
-----------------------------------------------------------------------------Power Cable:
Length 78 in (2.0 m)
Interface NEMA 5-15P (U.S.)
-----------------------------------------------------------------------------Signal Cable:
Length 60 in. (1.52 m)
Type 44 lead twisted pair
Connectors 44 pin subminiature D - shell (2)
==============================================================================
Page 15
Chapter 3. Power On Self Test (POST)/Problem Isolation
Chapter 3.0 Introduction
This chapter lists the assemblies checked by the Power On Self Test (POST) and
briefly describes the types of error codes that can occur. The chapter also
includes problem isolation procedures and a flowchart for quick reference.
Chapter 3.1 POST
POST is a series of diagnostic tests that automatically run on the COMPAQ
PORTABLE 386 Personal Computer when the system is turned on.
POST checks the following assemblies to ensure that the computer system is
functioning properly:
o Keyboard
o Power supply
o System board
o Display controller board
o Memory expansion boards
o Memory
o Diskette drives
o Fixed disk drives
POST also detects the type of mass storage devices installed in the computer.
If POST finds an error in the system, an error code results. The error code
can be audible, visual, or both. See Chapter 6, "Error Messages and Codes,"
for an explanation of error codes.
Chapter 3.2 Preliminary Steps to Problem Isolation
If you encounter an error condition, complete the following steps before
starting problem isolation procedures:
1. Turn off the computer.
2. Disconnect the AC power cord from the AC outlet.
3. Disconnect the signal cables of any peripheral devices from the
computer.
4. Remove any boards not manufactured by Compaq.
5. Install a loopback plug connector in both the parallel interface and the
serial interface. If you have a COMPAQ Internal Modem, install a modem
terminating plug in the modem RJ11 jack.
NOTE: To test your printer during the printer test or log errors to a
Page 16
printer, remove the loopback plug from the parallel interface and connect the
printer instead.
6. Reconnect the AC power cord to a well grounded AC outlet.
7. Insert the latest version of the COMPAQ DIAGNOSTICS diskette into Drive A
(Drive Position 1), and push in on the drive button.
8. Turn on the computer.
See the SUPPORT SOFTWARE MAINTENANCE AND SERVICE GUIDE for detailed
information on problem isolation.
Chapter 3.3 Problem Isolation Flowchart
The problem isolation flowchart provides a quick reference for identifying and
correcting problems that may occur during POST. The flowchart gives
troubleshooting procedures for identifying malfunctions. It also directs you
to the SUPPORT SOFTWARE MAINTENANCE AND SERVICE GUIDE and to Chapter 6, "Error
Messages and Codes," for more detailed troubleshooting information.
Page 17
Page 18
Page 19
Page 20
Chapter 4. Setup and Inspect
Chapter 4.0 Introduction
Please consult the SUPPORT SOFTWARE MAINTENANCE AND SERVICE GUIDE for current
information on SETUP and INSPECT.
Page 21
Chapter 5. Diagnostics Program
Chapter 5.0 Introduction
Please consult the SUPPORT SOFTWARE MAINTENANCE AND SERVICE GUIDE for current
information on DIAGNOSTICS.
Page 22
Chapter 6. Error Messages and Codes
Chapter 6.1 Introduction
This chapter provides Power On Self Test error messages, DIAGNOSTIC error
codes, and memory error codes.
The messages and codes are given in tables that list the message or error
code, a description of the error, and the probable failure or action required
to resolve the error condition.
Chapter 6.2 Power On Self Test Messages
An error message results if a problem is encountered during the Power On Self
Test. This Power On Self Test runs automatically when the system is turned
on.
Table 6-1 lists the messages, audible (beep) message, probable cause, and the
recommended action.
Table 6-1. Power On Self Test Error Messages
==============================================================================
Message Beeps Probable Cause Recommended Action
------------------------------------------------------------------------------
101 - ROM Error 1 Long, System ROM 1. Inspect ROM placement
1 Short 2. Verify correct ROM
-----------------------------------------------------------------------------
102 - System Board None System board Replace system board
Failure
-----------------------------------------------------------------------------
162 - System 2 Short System Run SETUP.
Options Not Set configuration
-----------------------------------------------------------------------------
163 - Time & Date 2 Short Invalid time Run SETUP.
Not Set or date
-----------------------------------------------------------------------------
164 - Memory Size 2 Short System Check memory configuration
Error configuration and run SETUP.
-----------------------------------------------------------------------------
XX000YY ZZ - 201 None RAM failure Refer to Section 6.4,
Memory Error "Memory Error Codes."
------------------------------------------------------------------------------
301 - Keyboard None Keyboard failure Replace keyboard.
Error
-----------------------------------------------------------------------------
303 - Keyboard None Keyboard Replace system board.
Controller Error controller
------------------------------------------------------------------------------
Message Beeps Probable Cause Recommended Action
------------------------------------------------------------------------------
location
3. Replace ROM
incorrect
incorrect
failure
Page 23
304 - Keyboard or None Keyboard or 1. Replace keyboard.
System Unit Error system board 2. Replace system board.
failure
-----------------------------------------------------------------------------
401 - Printer None System board Replace system board.
Interface Error failure
-----------------------------------------------------------------------------
402 - Monochrome 1 Long, System board or 1. Replace plasma display
Adapter Error 2 Short plasma display controller board
controller board 2. Replace system board
failure
-----------------------------------------------------------------------------
501 - Display 1 Long, Plasma display or 1. Replace plasma display
Adapter Failure 2 Short plasma display controller board.
controller board 2. Replace plasma display
-----------------------------------------------------------------------------
601 - Diskette None System board Replace system board.
Controller Error failure
------------------------------------------------------------------------------
701 - Coprocessor None Coprocessor Replace coprocessor.
Error Error
-----------------------------------------------------------------------------
702 - Coprocessor None Coprocessor 1. Check jumper setting.
Detection Error installation 2. Replace coprocessor.
------------------------------------------------------------------------------
Message Beeps Probable Cause Recommended Action
------------------------------------------------------------------------------
1780 - Disk 0 None Fixed disk drive/ Run DIAGNOSTICS.
Failure format error
-----------------------------------------------------------------------------
1782 - Disk None Fixed disk drive Run DIAGNOSTICS.
Controller Failure controller error
-----------------------------------------------------------------------------
1790 - Disk 0 None Fixed disk drive 1. Run SETUP.
Failure 2. Run DIAGNOSTICS.
-----------------------------------------------------------------------------
Parity Check 2 None Expansion RAM Run DIAGNOSTICS.
XX000 Y ZZ failure
-----------------------------------------------------------------------------
Audible 1 Short Power on None.
successful
-----------------------------------------------------------------------------
Audible 2 Short Power on None.
successful
-----------------------------------------------------------------------------
(RESUME ="F1" KEY) None As indicated on Press F1 key.
display
==============================================================================
Chapter 6.3 Diagnostic Error Codes
DIAGNOSTIC error codes occur if the system recognizes a problem while running
the COMPAQ DIAGNOSTICS Program. These error codes help identify possible
defective subassemblies. Tables 6-2 through 6-13 list possible error codes, a
description of the error condition, and the action required to resolve the
error condition.
In each case, the Recommended Action column lists steps necessary to correct
Page 24
the problem. After completing each step, run the DIAGNOSTICS Program to
verify that the error condition has been corrected. If the error code
reappears, perform the next step, then run the DIAGNOSTICS Program. Continue
until the DIAGNOSTICS Program no longer detects an error condition.
The error codes are in the form of AYY - XX or AAYY - XX. A or AA represents
the faulty subassembly. YY denotes the test or action that failed. XX
denotes a specific problem. For example, error code 603 - 07 indicates that
the diskette drive write/read/compare test failed.
For assistance in the removal and replacement of a particular subassembly, see
Chapter 8, "Removal and Replacement Procedures."
Table 6-2. Central Processing Unit Error Codes (1xx - xx Range)
==============================================================================
Error
Code Error Description Recommended Action
------------------------------------------------------------------------------
101 - 01 Central Processing Unit Replace the system board and retest
for error code 101 - 01
------------------------------------------------------------------------------
102 - 01 Numeric coprocessor The following steps apply to error
initial status word codes 102 - 01 through 102 - 15:
incorrect
1. Verify jumper setting.
102 - 02 Numeric coprocessor 2. Verify coprocessor is the
initial control word proper speed.
incorrect 3. Replace the coprocessor
and retest.
102 - 03 Numeric coprocessor 4. Replace the system board
tag word not all ones and retest.
102 - 04 Numeric coprocessor
tag word not all zeros
102 - 05 Numeric coprocessor
exchange command failed
102 - 06 Numeric coprocessor
masked exception
incorrectly handled
102 - 07 Numeric coprocessor
unmasked exception
incorrectly handled
------------------------------------------------------------------------------
Error
Code Error Description Recommended Action
------------------------------------------------------------------------------
102 - 08 Numeric coprocessor The following steps apply
wrong mask bit set in to error codes 102 - 01
status register through 102 - 15:
102 - 09 Numeric coprocessor 1. Verify jumper setting.
unable to store real 2. Verify coprocessor is the
number proper speed.
3. Replace the coprocessor
102 - 10 Numeric coprocessor and retest.
real number calculation 4. Replace the system board
Page 25
test failed and retest.
102 - 11 Numeric coprocessor
speed test failed
102 - 12 Numeric coprocessor
pattern test failed
102 - 14 Switch indicates no
coprocessor present
102 - 15 Coprocessor is inoperative
or socket is unoccupied
------------------------------------------------------------------------------
Error
Code Error Description Recommended Action
------------------------------------------------------------------------------
103 - 01 Direct memory access page Replace the system board and
registers test failed retest for error codes 103 - 01
through 113 - 01.
103 - 02 Direct memory access byte
controller test failed
103 - 03 Direct memory access word
controller test failed.
104 - 01 Interrupt controller master
test failed.
104 - 02 Interrupt controller slave
test failed.
104 - 03 Interrupt controller
software RTC is inoperative.
105 - 01 Port 61, bit 6 not at zero.
105 - 02 Port 61, bit 5 not at zero.
105 - 03 Port 61, bit 3 not at zero.
105 - 04 Port 61, bit 1 not at zero.
------------------------------------------------------------------------------
Error
Code Error Description Recommended Action
------------------------------------------------------------------------------
105 - 05 Port 61, bit 0 not at zero. Replace the system board
and retest for error codes
105 - 06 Port 61, bit 5 not at one. 103 - 01 through 113 - 01.
105 - 07 Port 61, bit 3 not at one.
105 - 08 Port 61, bit 1 not at one.
105 - 09 Port 61, bit 0 not at one.
105 - 10 Port 61 I/O test failed.
105 - 11 Port 61, bit 7 not at zero.
Page 26
105 - 12 Port 61, bit 2 not at zero.
105 - 13 No interrupt generated by
fail safe timer.
105 - 14 NMI not triggered by
fail safe timer.
106 - 01 Keyboard controller self
test failed.
107 - 01 CMOS RAM test failed.
108 - 02 CMOS interrupt test failed.
108 - 03 CMOS interrupt test, CMOS
not properly initialized.
------------------------------------------------------------------------------
Error
Code Error Description Recommended Action
------------------------------------------------------------------------------
109 - 01 CMOS clock load data test Replace the system board and retest
failed. for error codes 103 - 01 through
113 - 01.
109 - 02 CMOS clock rollover test
failed.
109 - 03 CMOS clock test, CMOS not
properly initialized.
110 - 01 Programmable timer load
data test failed.
110 - 02 Programmable timer
dynamic test failed.
110 - 03 Programmable timer 2
load data test failed.
111 - 01 Refresh detect test failed.
112 - 01 Speed test slow mode out
of range.
112 - 02 Speed test mixed mode
out of range.
112 - 04 Unable to enter slow mode
in speed test.
------------------------------------------------------------------------------
Error
Code Error Description Recommended Action
------------------------------------------------------------------------------
112 - 05 Unable to enter mixed mode Replace the system board
in speed test. and retest for error codes
103 - 01 through 113 - 01.
112 - 06 Unable to enter fast mode
in speed test.
112 - 07 Speed test system error.
Page 27
112 - 08 Speed test unable to enter
auto mode.
112 - 09 Speed test unable to enter
high mode.
112 - 10 Speed test high mode out
of range.
112 - 11 Speed test auto mode out
of range.
112 - 12 Speed test variable speed
mode inoperative.
113 - 01 Protected mode test failed.
------------------------------------------------------------------------------
Error
Code Error Description Recommended Action
------------------------------------------------------------------------------
114 - 01 Speaker test failed. 1. Verify that speaker is
connected.
2. Replace the speaker and retest.
3. Replace the system board and
retest.
-----------------------------------------------------------------------------199 - 00 Installed devices test 1. Check system configuration.
failed. 2. Verify cable connections.
3. Check switch settings.
4. Run SETUP.
5. Replace system board and retest.
==============================================================================
Table 6-3. Memory Error Codes (2xx - xx Range)
==============================================================================
Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------201 - 01 Memory machine ID The following steps apply to error
test failed. codes 201 - 01 through 202 - 03:
202 - 01 Memory system ROM 1. Replace plasma display
checksum failed. controller board.
2. Replace the system ROM and
202 - 02 RAM/ROM system test failed. retest.
3. Replace the system board and
202 - 03 RAM/ROM protect test failed. retest.
-----------------------------------------------------------------------------203 - 01 Memory write/read test failed Replace the appropriate memory
test failed. module(s) or memory board and
retest for error codes 203 - 01
203 - 02 Error during saving program through 210 - 03. Refer to
memory in write/read test. Section 6.4.
203 - 03 Error during restore of
program in write/read test
204 - 01 Memory address test failed
Page 28
204 - 02 Error during saving program
memory in address test.
204 - 03 Error during restore of
program memory in address test.
204 - 04 A20 address test failed.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------204 - 05 Page hit address test failed. Replace the appropriate memory
module(s) or memory board and
205 - 01 Walking I/O test failed. retest for error codes 203 - 01
through 210 - 03. Refer to
205 - 02 Error during saving program Section 6.4.
memory in walking I/O test.
205 - 03 Error during restore of program
memory in walking I/O test.
205 - 04 Insufficient memory to
perform test.
208 - 01 Memory refresh test failed.
208 - 02 Error during saving program
memory in refresh test.
208 - 03 Error during restore of program
memory in refresh test.
210 - xx Random Pattern Test
210 - 01 Random pattern test failed.
210 - 02 Error during saving program.
210 - 03 Error while restore of program.
==============================================================================
Table 6-4. Keyboard Error Codes (3xx - xx Range)
==============================================================================
Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------301 - 01 Keyboard short test, The following steps apply to error
8042 self test failed. codes 301 - 01 through 304 - 06.
301 - 02 Keyboard short test, 1. Check the keyboard connector.
interface test failed. If disconnected, turn off the
computer and connect the
301 - 03 Keyboard short test, keyboard.
echo test failed 2. Replace the keyboard and retest.
3. Replace the system board and
301 - 04 Keyboard short test, retest.
keyboard retest failed.
302 - 01 Keyboard long test failed.
Page 29
303 - 01 Keyboard LED test,
8042 self test failed.
303 - 02 Keyboard LED test,
retest test failed.
303 - 03 Keyboard LED test,
retest failed.
303 - 04 Keyboard LED test,
LED command test failed.
303 - 05 Keyboard LED test,
LED command test failed.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------303 - 06 Keyboard LED test, The following steps apply to error
LED command test failed. codes 301 - 01 through 304 - 06.
303 - 07 Keyboard LED test, 1. Check the keyboard connector.
LED command test failed. If disconnected, turn off the
computer and connect the
303 - 08 Keyboard LED test, command keyboard.
byte restore test failed. 2. Replace the keyboard and retest.
3. Replace the system board and
303 - 09 Keyboard LED test, retest.
LEDs failed to light.
304 - 01 Keyboard repeat key test
failed.
304 - 02 Unable to enter mode 3.
304 - 03 Incorrect scan code from
keyboard.
304 - 04 No make code observed.
304 - 05 Cannot disable repeat key
feature.
304 - 06 Unable to return to normal mode.
==============================================================================
Table 6-5. Parallel Printer Error Codes (4xx - xx Range)
==============================================================================
Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------401 - 01 Printer connected test The following steps apply to error
failed. codes 401 - 01 through 498 - 00:
402 - 01 Printer data register 1. If a printer is connected, be
failed sure it is turned ON and in the
online mode.
402 - 02 Printer control register 2. Check the jumper settings on the
failed. system board (see Chapter 9,
"Jumper and Switch Settings").
Page 30
402 - 03 Printer data and control 3. Replace the Serial/Parallel
registers failed. Interface Board, if applicable,
and retest.
402 - 04 Printer loopback failed. 4. Replace the printer and/or the
printer cable and retest.
402 - 05 Printer loopback and 5. Replace the system board and
data registers failed. retest.
402 - 06 Printer loopback and control
registers failed.
402 - 07 Printer loopback, data, and
control registers failed.
402 - 08 Printer interrupt test failed.
402 - 09 Printer interrupt and data
registers failed.
402 - 10 Printer interrupt and
control registers failed.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------402 - 11 Printer interrupt, control, The following steps apply to error
and data registers failed. codes 401 - 01 through 498 - 00:
402 - 12 Printer interrupt and 1. If a printer is connected, be
loopback failed. sure it is turned ON and in the
online mode.
402 - 13 Printer interrupt, loopback, 2. Check the jumper settings on the
and data registers failed. system board (see Chapter 9,
"Jumper and Switch Settings").
402 - 14 Printer interrupt, loopback, 3. Replace the Serial/Parallel
and control registers failed. Interface Board, if applicable,
and retest.
402 - 15 Printer interrupt, loopback, 4. Replace the printer and/or the
control, and data registers printer cable and retest.
failed. 5. Replace the system board and
retest.
402 - 16 Printer unexpected interrupt
received.
403 - 01 Printer pattern test failed.
498 - 00 Printer failed or not connected.
==============================================================================
Table 6-6. Video Error Codes (5xx - xx Range) (For External Video Display
Units Only)
==============================================================================
Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------501 - 01 Video controller test failed. The following steps apply to error
codes 501 - 01 through 516 - 01:
502 - 01 Video memory test failed.
1. Replace the video display
503 - 01 Video attribute test failed. controller board and retest.
Page 31
2. Replace the monitor and
504 - 01 Video character set test retest.
failed. 3. Replace the system board
and retest.
505 - 01 Video 80 x 25 mode9x14
character cell test failed.
506 - 01 Video 80 x 25 mode8x8
character cell test failed.
507 - 01 Video 40 x 25 mode test failed.
508 - 01 Video 320 x 200 mode color
set 0 test failed.
509 - 01 Video 320 x 200 mode color
set 1 test failed.
510 - 01 Video 640 x 200 mode test
failed.
511 - 01 Video screen memory page test
failed.
512 - 01 Video gray scale test failed.
514 - 01 Video white screen test failed.
516 - 01 Video noise pattern test
failed.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------517 - xx Lightpen Test The following steps apply for
error codes 517 - xx:
517 - 01 Lightpen test failed;
no response. 1. Replace the lightpen and retest
2. Replace the video display
517 - 02 Lightpen text mode test controller board and retest.
failed; invalid response. 3. Replace the system board and
retest.
517 - 03 Lightpen medium resolution
mode test failed; no response.
517 - 05 Lightpen medium resolution
mode test failed; invalid
response.
==============================================================================
Table 6-7. Diskette Drive Error Codes (6xx - xx Range)
==============================================================================
Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------600 - xx Diskette Drive ID Test The following steps apply to error
codes 600 - xx through 699 - 00:
600 - 05 Failed to reset controller
1. Replace the diskette and retest.
600 - 20 Failed to get drive type 2. Check the jumper settings on
Page 32
the system board and retest
601 - xx Format Test (see Chapter 9, "Jumper and
Switch Settings").
601 - 05 Failed to reset controller 3. Check the diskette power and
signal cable.
601 - 09 Failed to format a track 4. Replace the diskette power and
signal cables and retest.
601 - 23 Failed to set drive type in 5. Replace the diskette drive and
ID media retest.
6. Replace the system board and
602 - xx Diskette Read Test retest.
602 - 01 Exceeded maximum soft error
limit
602 - 02 Exceeded maximum hard error
limit
602 - 03 Previously exceeded maximum
soft error limit
602 - 04 Previously exceeded maximum
hard error limit
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------602 - 05 Failed to reset controller The following steps apply to error
codes 600 - xx through 699 - 00:
602 - 06 Fatal error while reading
1. Replace the diskette and retest.
603 - xx Diskette Write/Read/Compare 2. Check the jumper settings on
Test the system board and retest
(see Chapter 9, "Jumper and
603 - 07 Fatal error while writing Switch Settings").
3. Check the diskette power and
603 - 08 Failed compare of write/read signal cables.
buffers 4. Replace the diskette power and
signal cables and retest.
604 - xx Diskette Random Seek Test 5. Replace the diskette drive and
retest.
604 - 01 Exceeded maximum soft error 6. Replace the system board and
limit retest.
604 - 02 Exceeded maximum hard error
limit
604 - 03 Previously exceeded soft
error limit
604 - 04 Previously exceeded hard
error limit
604 - 05 Failed to reset controller
604 - 06 Fatal error while reading
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
------------------------------------------------------------------------------
Page 33
605 - xx Diskette ID Media Test The following steps apply to error
codes 600 - xx through 699 - 00:
605 - 20 Failed to get drive type
1. Replace the diskette and retest.
605 - 24 Failed to read diskette 2. Check the jumper settings on
media the system board and retest
(see Chapter 9, "Jumper and
605 - 25 Failed to verify diskette Switch Settings").
media 3. Check the diskette power and
signal cables.
606 - xx Diskette Speed Test 4. Replace the diskette power and
signal cables and retest.
606 - 26 Failed to read media in 5. Replace the diskette drive and
speed test retest.
6. Replace the system board and
606 - 26 Failed speed limits retest.
607 - xx Diskette Wrap Test
607 - 10 Failed sector wrap test
608 - xx Diskette Write Protect Test
608 - 28 Failed Write Protect Test
609 - xx Diskette Reset Controller Test
609 - 05 Failed to Reset Controller
610 - xx Diskette Change Line Test
610 - 21 Failed to get change line
status
610 - 22 Failed to clear change line
status
697 - 00 Diskette type error.
698 - 00 Diskette drive speed not
within limits
699 - 00 Drive/media ID error;
rerun SETUP
==============================================================================
Table 6-8. Monochrome Video Board Error Codes (8xx - xx Range)
==============================================================================
Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------802 - 01 Video memory test failed. 1. Replace monitor and retest.
2. Replace monochrome board and
824 - 01 Monochrome text mode test retest.
failed. 3. Replace system board and retest.
==============================================================================
Table 6-9. Serial Communications Error Codes (11xx - xx Range)
==============================================================================
Error
Page 34
Code Error Description Recommended Action
-----------------------------------------------------------------------------1101 - xx Asynchronous Communications The following steps apply to
Interface Test error codes 1101 - xx:
1101 - 01 UART DLAB bit failed. 1. Check the switch settings on the
Serial/Parallel Interface Board,
1101 - 02 Line input or UART fault. if applicable.
2. Check the jumper settings on the
1101 - 03 Address line fault. system board.
3. Replace the Serial/Parallel
1101 - 04 Data line fault. Interface Board, if applicable.
4. Replace the system board and
1101 - 05 UART control signal failed. retest.
1101 - 06 UART THRE bit failed.
1101 - 07 UART DATA READY bit failed.
1101 - 08 UART TX/RX buffer failed.
1101 - 09 Interrupt circuit failed.
1101 - 10 COM1 set to interrupt 3.
1101 - 11 COM2 set to interrupt 4.
1101 - 12 Drive/receiver control
signal failed.
1101 - 13 UART control signal
interrupt failed.
1101 - 14 Drive/receiver data
failed.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1109 - 01 Clock register The following steps apply to error
initialization failed. 1109 - xx:
1109 - 02 Clock register rollover 1. Check the jumper settings on
failed. the system board (see Chapter 9,
"Jumper and Switch Settings").
1109 - 03 Clock reset failed. 2. Replace the system board and
retest.
1109 - 04 Input line or clock failed.
1109 - 05 Address line fault.
1109 - 06 Data line fault.
==============================================================================
Table 6-10. Modem Communications Error Codes (12xx - xx Range)
==============================================================================
Page 35
Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1201 - xx Modem Internal Loopback Test The following steps apply to error
codes 1201 - 01 through 1210 - 11:
1201 - 01 UART DLAB bit failed.
1. Check the jumper settings on
1201 - 02 Line input or UART failed. the system board (see Chapter 9,
"Jumper and Switch Settings").
1201 - 03 Address line fault. 2. Check the modem connection to
the 32 bit memory/modem
1201 - 04 Data line fault. interface board.
3. Replace the modem and retest.
1201 - 05 UART control signal failed. 4. Replace the 32 bit memory/modem
interface board and retest.
1201 - 06 UART THRE bit failed. 5. Replace the system board and
retest.
1201 - 07 UART DATA READY bit failed.
1201 - 08 UART TX/RX buffer failed.
1201 - 09 INTERRUPT circuit failed.
1201 - 10 COM1 set to invalid interrupt.
1201 - 11 COM2 set to invalid interrupt.
1201 - 12 DRIVER/RECEIVER control
signal failed.
1201 - 13 UART control signal
interrupt failed.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1201 - 14 DRIVER/RECEIVER data failed. The following steps apply to error
codes 1201 - 01 through 1210 - 11:
1201 - 15 Modem detection failed.
1. Check the jumper settings on
1201 - 16 Modem ROM, checksum failed. the system board (see Chapter 9,
"Jumper and Switch Settings").
1201 - 17 Tone detection failed. 2. Check the modem connection to
the 32 bit memory/modem
1202 - xx Modem Time Out Test interface board.
3. Replace the modem and retest.
1202 - 01 Modem timed out waiting for 4. Replace the 32 bit memory/modem
SYNC. interface board and retest.
5. Replace the system board and
1202 - 02 Modem timed out waiting for retest.
response.
1202 - 03 Modem exceeded data block
retry limit.
1203 - xx Modem External Termination
Test
Page 36
1203 - 01 Modem external TIP/RING
failed.
1203 - 02 Modem external DATA TIP/RING
failed.
1203 - 03 Modem line termination
failed.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1204 - xx Modem Auto Originate Test The following steps apply to error
codes 1201 - 01 through 1210 - 11:
1204 - 01 Modem timed out waiting for
SYNC. 1. Check the jumper settings on
the system board (see Chapter 9,
1204 - 02 Modem timed out waiting for "Jumper and Switch Settings").
response. 2. Check the modem connection to
the 32 bit memory/modem
1204 - 03 Modem exceeded data block interface board.
retry limit. 3. Replace the modem and retest.
4. Replace the 32 bit memory/modem
1204 - 04 RVC exceeded carrier lost interface board and retest.
limit. 5. Replace the system board and
retest.
1204 - 05 XMIT exceeded carrier lost
limit.
1204 - 06 Time out waiting for dial
tone.
1204 - 07 Dial number string too long.
1204 - 08 Modem timed out waiting for
remote response.
1204 - 09 Modem exceeded maximum
redial limit.
1204 - 10 Line quality prevented
remote connection.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1204 - 11 Modem timed out waiting for The following steps apply to error
remote connection. codes 1201 - 01 through 1210 - 11:
1205 - xx Modem Auto Answer Test 1. Check the jumper settings on
the system board (see Chapter 9,
1205 - 01 Modem timed out waiting "Jumper and Switch Settings").
for SYNC. 2. Check the modem connection to
the 32 bit memory/modem
1205 - 02 Modem timed out waiting interface board.
for response. 3. Replace the modem and retest.
4. Replace the 32 bit memory/modem
1205 - 03 Modem exceeded data block interface board and retest.
Page 37
retry limit. 5. Replace the system board and
retest.
1205 - 04 RCV exceeded carrier lost
limit.
1205 - 05 XMIT exceeded carrier lost
limit.
1205 - 06 Time out waiting for dial
tone.
1205 - 07 Dial number string too long.
1205 - 08 Modem timed out waiting for
remote response.
1205 - 09 Modem exceeded maximum
redial limit.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1205 - 10 Line quality prevented The following steps apply to error
remote connection. codes 1201 - 01 through 1210 - 11:
1205 - 11 Modem timed out waiting for 1. Check the jumper settings on
remote connection. the system board (see Chapter 9,
"Jumper and Switch Settings").
1206 - xx Dial Multifrequency Tone Test 2. Check the modem connection to
the 32 bit memory/modem
1206 - 17 Tone detection failed. interface board.
3. Replace the modem and retest.
1210 - xx Modem Direct Connect Test 4. Replace the 32 bit memory/modem
interface board and retest.
1210 - 01 Modem timed out waiting for 5. Replace the system board and
SYNC. retest.
1210 - 02 Modem timed out waiting for
response.
1210 - 03 Modem exceeded data block
retry limit.
1210 - 04 RCV exceeded carrier lost
limit.
1210 - 05 XMIT exceeded carrier lost
limit.
1210 - 06 Time out waiting for dial
tone.
1210 - 07 Dial number string too long.
1210 - 08 Modem timed out waiting for
remote response.
Page 38
1210 - 09 Modem exceeded maximum
redial limit.
1210 - 10 Line quality prevented
remote connection.
1210 - 11 Modem timed out waiting
for remote connection.
==============================================================================
Table 6-11. Fixed Disk Drive Error Codes (17xx - xx Range)
==============================================================================
Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1700 - xx Fixed Disk Drive ID Test The following steps apply to error
codes 1700 - xx through 1717 - 73:
1700 - 05 Failed to reset controller
1. Check the system board jumper
1700 - 09 Failed to format a track settings and retest (see
Chapter 9, "Jumper and Switch
1700 - 41 Failed to ID fixed disk drive Settings").
(drive not ready). 2. Replace the fixed disk drive
signal and power cables and
1700 - 42 Recalibrate fixed disk drive retest.
failed. 3. Replace the fixed disk drive
and retest.
1700 - 45 Failed to get fixed disk 4. Replace the system board and
drive parameters from ROM. retest.
1700 - 46 Invalid fixed disk drive
parameters found in ROM.
1700 - 66 Failed to initialize fixed
disk drive parameter.
1700 - 69 Failed to read drive size
from controller.
1700 - 70 Failed translate mode.
1700 - 71 Failed nontranslated mode.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1701 - xx Fixed Disk Format Test The following steps apply to error
codes 1700 - xx through 1717 - 73:
1701 - 05 Failed to reset controller
1. Check the system board jumper
1701 - 09 Failed to format a cylinder settings and retest (see
Chapter 9, "Jumper and Switch
1701 - 42 Recalibrate fixed disk drive Settings").
failed. 2. Replace the fixed disk drive
signal and power cables and
1701 - 58 Failed to write sector retest.
buffer. 3. Replace the fixed disk drive
Page 39
and retest.
1701 - 59 Failed to read sector 4. Replace the system board and
buffer. retest.
1701 - 66 Failed to initialize fixed
disk drive parameter.
1702 - xx Fixed Disk Drive Read Test
1702 - 01 Exceeded maximum soft error
limit.
1702 - 02 Exceeded maximum hard error
limit.
1702 - 03 Previously exceeded maximum
soft error limit.
1702 - 04 Previously exceeded maximum
hard error limit.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1702 - 05 Failed to reset controller The following steps apply to error
codes 1700 - xx through 1717 - 73:
1702 - 06 Fatal error while reading
1. Check the system board jumper
1702 - 40 Failed cylinder 0. settings and retest
(see Chapter 9, "Jumper and
1702 - 65 Exceeded maximum bad sector Switch Settings").
per track. 2. Replace the fixed disk drive
signal and power cables and
1702 - 68 Failed to read long. retest.
3. Replace the fixed disk drive
1702 - 70 Failed to translate mode. and retest.
4. Replace the system board and
1702 - 71 Failed nontranslated mode. retest.
1702 - 72 Exceeded maximum bad track
limit.
1702 - 73 Previously exceeded maximum
bad track limit.
1703 - xx Fixed Disk Drive Write/Read/
Compare Test
1703 - 01 Exceeded maximum soft error
limit.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1703 - 02 Exceeded maximum hard error The following steps apply to error
limit. codes 1700 - xx through 1717 - 73:
1703 - 03 Previously exceeded maximum 1. Check the system board jumper
Page 40
soft error limit. settings and retest
(see Chapter 9, "Jumper and
1703 - 04 Previously exceeded maximum Switch Settings").
hard error limit. 2. Replace the fixed disk drive
signal and power cables and
1703 - 05 Failed to reset controller. retest.
3. Replace the fixed disk drive
1703 - 06 Fatal error while reading. and retest.
4. Replace the system board and
1703 - 07 Fatal error while writing. retest.
1703 - 08 Failed compare of write/
read buffers.
1703 - 40 Cylinder 0 error.
1703 - 55 Cylinder 1 error.
1703 - 63 Failed soft error rate.
1703 - 65 Exceeded maximum bad sector
per track.
1703 - 67 Failed to write long.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1703 - 68 Failed to read long. The following steps apply to error
codes 1700 - xx through 1717 - 73:
1703 - 70 Failed translate mode.
1. Check the system board jumper
1703 - 71 Failed nontranslated mode. settings and retest
(see Chapter 9, "Jumper and
1703 - 72 Exceeded maximum bad track Switch Settings").
limit. 2. Replace the fixed disk drive
signal and power cables and
1703 - 73 Previously exceeded maximum retest.
bad track limit. 3. Replace the fixed disk drive
and retest.
1704 - xx Fixed Disk Drive Random Seek 4. Replace the system board and
Test. retest.
1704 - 01 Exceeded maximum soft error
limit.
1704 - 02 Exceeded maximum hard error
limit.
1704 - 03 Previously exceeded maximum
soft error limit.
1704 - 04 Previously exceeded maximum
hard error limit.
1704 - 05 Failed to reset controller.
Page 41
1704 - 06 Fatal error while reading.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1704 - 40 Cylinder 0 error. The following steps apply to error
codes 1700 - xx through 1717 - 73:
1704 - 55 Cylinder 1 error.
1. Check the system board jumper
1704 - 65 Exceeded maximum bad sector settings and retest
per track. (see Chapter 9, "Jumper and
Switch Settings").
1704 - 70 Failed translate mode. 2. Replace the fixed disk drive
signal and power cables and
1704 - 71 Failed nontranslated mode. retest.
3. Replace the fixed disk drive
1704 - 72 Exceeded maximum bad track and retest.
limit. 4. Replace the system board and
retest.
1704 - 73 Previously exceeded maximum
bad track limit.
1705 - xx Fixed Disk Drive Controller
Test.
1705 - 05 Failed to reset controller.
1705 - 44 Failed fixed disk drive
controller diagnostics.
1705 - 56 Failed controller RAM
diagnostics.
1705 - 57 Failed controller to drive
diagnostics.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1706 - xx Fixed Disk Drive Ready Test The following steps apply to error
codes 1700 - xx through 1717 - 73:
1706 - 41 Drive not ready.
1. Check the system board jumper
1707 - xx Fixed Disk Drive Recalibrate settings and retest
Test (see Chapter 9, "Jumper and
Switch Settings").
1707 - 42 Failed to recalibrate fixed 2. Replace the fixed disk drive
disk drive. signal and power cables and
retest.
1708 - xx Fixed Disk Drive Format Bad 3. Replace the fixed disk drive
Track Test and retest.
4. Replace the system board and
1708 - 02 Exceeded maximum hard error retest.
limit.
1708 - 05 Failed to reset controller.
Page 42
1708 - 09 Format track bad failed.
1708 - 42 Recalibrate drive failed.
1708 - 43 Failed to format a cylinder
bad.
1708 - 58 Failed to write sector
buffer.
1708 - 59 Failed to read sector
buffer.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1709 - xx Fixed Disk Drive Reset The following steps apply to error
Controller Test codes 1700 - xx through 1717 - 73:
1709 - 05 Failed to reset controller. 1. Check the system board jumper
settings and retest
1710 - xx Fixed Disk Drive Park Head (see Chapter 9, "Jumper and
Test Switch Settings").
2. Replace the fixed disk drive
1710 - 45 Failed to get fixed disk signal and power cables and
drive parameters from ROM. retest.
3. Replace the fixed disk drive
1710 - 47 Failed to park heads. and retest.
4. Replace the system board and
1714 - xx Fixed Disk Drive File retest.
Write Test
1714 - 01 Exceeded maximum soft error
limit.
1714 - 02 Exceeded maximum hard error
limit.
1714 - 03 Previously exceeded maximum
soft error limit.
1714 - 04 Previously exceeded maximum
hard error limit.
1714 - 05 Failed to reset controller.
1714 - 06 Fatal error while reading.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1714 - 07 Fatal error while writing. The following steps apply to error
codes 1700 - xx through 1717 - 73:
1714 - 08 Failed compare of write/
read buffers. 1. Check the system board jumper
settings and retest
Page 43
1714 - 10 Failed diskette sector wrap (see Chapter 9, "Jumper and
during read. Switch Settings").
2. Replace the fixed disk drive
1714 - 20 Failed to get diskette drive signal and power cables and
type. retest.
3. Replace the fixed disk drive
1714 - 24 Failed to read diskette media. and retest.
4. Replace the system board and
1714 - 25 Failed to verify diskette retest.
media.
1714 - 40 Cylinder 0 error.
1714 - 48 Failed to move disk table
to RAM.
1714 - 49 Failed to read diskette media
in File Write Test.
1714 - 50 Failed File I/O Write Test.
1714 - 51 Failed File I/O Read Test.
1714 - 52 Failed File I/O Compare
Test.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1714 - 55 Failed cylinder 1. The following steps apply to error
codes 1700 - xx through 1717 - 73:
1714 - 65 Exceeded maximum bad sector
per track. 1. Check the system board jumper
settings and retest
1714 - 70 Failed translate mode. (see Chapter 9, "Jumper and
Switch Settings").
1714 - 71 Failed nontranslated mode. 2. Replace the fixed disk drive
signal and power cables and
1714 - 72 Exceeded maximum bad track retest.
limit. 3. Replace the fixed disk drive
and retest.
1714 - 73 Previously exceeded maximum 4. Replace the system board and
bad track limit. retest.
1715 - xx Fixed Disk Drive Head Select
Test
1715 - 45 Failed to get fixed disk drive
parameters from ROM.
1715 - 53 Failed Drive/Head register
test.
1715 - 54 Failed Digital Input
register test.
------------------------------------------------------------------------------
Page 44
Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1716 - xx Fixed Disk Drive Conditional The following steps apply to error
Format Test codes 1700 - xx through 1717 - 73:
1716 - 01 Exceeded maximum soft error 1. Check the system board jumper
limit. settings and retest
(see Chapter 9, "Jumper and
1716 - 02 Exceeded maximum hard error Switch Settings").
limit. 2. Replace the fixed disk drive
signal and power cables and
1716 - 05 Failed to reset controller. retest.
3. Replace the fixed disk drive
1716 - 06 Fatal error while reading. and retest.
4. Replace the system board and
1716 - 07 Fatal error while writing. retest.
1716 - 08 Failed compare of write/
read buffers.
1716 - 09 Failed to format a cylinder.
1716 - 40 Cylinder 0 failed.
1716 - 42 Failed recalibrate.
1716 - 55 Cylinder 1 error.
1716 - 58 Failed to write sector
buffer.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1716 - 59 Failed to read sector The following steps apply to error
buffer. codes 1700 - xx through 1717 - 73:
1716 - 60 Failed to compare sector 1. Check the system board jumper
buffer. settings and retest
(see Chapter 9, "Jumper and
1716 - 65 Exceeded maximum bad sector Switch Settings").
per track. 2. Replace the fixed disk drive
signal and power cables and
1716 - 66 Failed to initialize drive retest.
parameter. 3. Replace the fixed disk drive
and retest.
1716 - 70 Failed translate mode. 4. Replace the system board and
retest.
1716 - 71 Failed nontranslate mode.
1716 - 72 Exceeded maximum bad track
limit.
1716 - 73 Previously exceeded maximum
bad track limit.
Page 45
1717 - xx Fixed Disk Drive ECC Test
1717 - 01 Exceeded maximum soft error
limit.
1717 - 02 Exceeded maximum hard error
limit.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1717 - 03 Previously exceeded maximum The following steps apply to error
soft error limit. codes 1700 - xx through 1717 - 73:
1717 - 04 Previously exceeded maximum 1. Check the system board jumper
hard error limit. settings and retest
(see Chapter 9, "Jumper and
1717 - 05 Reset controller failed. Switch Settings").
2. Replace the fixed disk drive
1717 - 06 Fatal error while reading signal and power cables and
(BIOS st.>=0x20). retest.
3. Replace the fixed disk drive
1717 - 07 Fatal error while writing. and retest.
4. Replace the system board and
1717 - 08 Failed compare of write/read retest.
buffers.
1717 - 40 Cylinder 0 failed.
1717 - 55 Cylinder 1 error.
1717 - 61 Failed uncorrectable error.
1717 - 62 Failed correctable error.
1717 - 65 Exceeded maximum bad sector
per track.
1717 - 67 Failed to write long.
1717 - 68 Failed to read long.
1717 - 70 Failed translate mode.
1717 - 71 Failed nontranslate mode.
1717 - 72 Exceeded maximum bad track
limit.
1717 - 73 Previously exceeded maximum
bad track limit.
==============================================================================
Table 6-12. Tape Drive Error Codes (19xx - xx Range)
==============================================================================
Page 46
Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1900 - xx Tape Test The following codes apply to
error codes 1900 - xx through
1900 - 01 Tape not installed. 1991 - xx:
1900 - 02 Drive installed in other 1. Replace the tape cartridge
drive 3. and retest.
2. Replace the tape drive
1900 - 26 Cannot identify drive. expansion unit and retest.
3. Replace the system board
1900 - 27 Drive not compatible with and retest.
controller.
1900 - 92 Tape drive mismatched.
1900 - 93 Tape cartridge mismatched.
1901 - xx Tape Servo Write Test
1901 - 01 Drive not installed.
1901 - 02 Cartridge not installed.
1901 - 03 Tape motion error.
1901 - 04 Drive busy error.
1901 - 05 Track seek error.
1901 - 06 Tape write protected error.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1901 - 07 Tape already servo written. The following codes apply to
error codes 1900 - xx through
1901 - 08 Unable to servo write. 1991 - xx:
1901 - 11 Drive recalibration error. 1. Replace the tape cartridge
and retest.
1901 - 21 Got servo pulses second time 2. Replace the tape drive
but not first. expansion unit and retest.
3. Replace the system board
1901 - 22 Never got to end of tape and retest.
after servo check.
1901 - 25 Unable to erase cartridge.
1901 - 27 Drive not compatible with
controller.
1902 - xx Tape Format Test
Page 47
1902 - 01 Drive not installed.
1902 - 02 Cartridge not installed.
1902 - 03 Tape motion error.
1902 - 04 Drive busy error.
1902 - 05 Track seek error.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1902 - 06 Tape write protected error. The following codes apply to
error codes 1900 - xx through
1902 - 09 Unable to format. 1991 - xx:
1902 - 10 Format mode error. 1. Replace the tape cartridge
and retest.
1902 - 11 Drive recalibration error. 2. Replace the tape drive
expansion unit and retest.
1902 - 12 Tape not servo written. 3. Replace the system board
and retest.
1902 - 13 Tape not formatted.
1902 - 21 Got servo pulses second time
but not first.
1902 - 22 Never got to end of tape
after servo check.
1902 - 27 Drive not compatible with
controller.
1902 - 28 Format gap error.
1903 - xx Tape Drive Sensor Test
1903 - 01 Drive not installed.
1903 - 23 Change line unset.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1903 - 27 Drive not compatible with The following codes apply to
controller. error codes 1900 - xx through
1991 - xx:
1904 - xx Tape Beginning of Tape/End
of Tape Test 1. Replace the tape cartridge
and retest.
1904 - 01 Drive not installed. 2. Replace the tape drive
expansion unit and retest.
1904 - 02 Cartridge not installed. 3. Replace the system board
and retest.
1904 - 03 Tape motion error.
Page 48
1904 - 04 Drive busy error.
1904 - 05 Track seek error.
1904 - 15 Sense error flag.
1904 - 27 Drive not compatible with
controller.
1905 - xx Tape Read Test
1905 - 01 Drive not installed.
1905 - 02 Cartridge not installed.
1905 - 03 Tape motion error.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------1905 - 04 Drive busy error. The following codes apply to
error codes 1900 - xx through
1905 - 05 Track seek error. 1991 - xx:
1905 - 14 Drive timeout error. 1. Replace the tape cartridge
and retest.
1905 - 16 Block locate (block ID) error. 2. Replace the tape drive
expansion unit and retest.
1905 - 17 Soft error limit exceeded. 3. Replace the system board
and retest.
1905 - 18 Hard error limit exceeded.
1905 - 19 Write (probably ID error).
1905 - 27 Drive not compatible with
controller.
1906 - xx Tape Write, Read, Compare Test
1906 - 01 Drive not installed.
1906 - 02 Cartridge not installed.
1906 - 03 Tape motion error.
1906 - 04 Drive busy error.
1906 - 05 Track seek error.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
------------------------------------------------------------------------------
Page 49
1906 - 06 Tape write protected error. The following codes apply to
error codes 1900 - xx through
1906 - 14 Drive timeout error. 1991 - xx:
1906 - 16 Block locate (block ID) error. 1. Replace the tape cartridge
and retest.
1906 - 17 Soft error limit exceeded. 2. Replace the tape drive
expansion unit and retest.
1906 - 18 Hard error limit exceeded. 3. Replace the system board
and retest.
1906 - 19 Write (probably ID error).
1906 - 20 765 Fatal error.
1906 - 24 Fail write protect test.
1906 - 26 Cannot ID drive.
1906 - 27 Drive not compatible with
controller.
1991 - 12 Tape has not been servo
written.
==============================================================================
Table 6-13. COMPAQ Video Graphics Error Codes (24xx - xx Range)
==============================================================================
Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------2402 - 01 Video Memory Test The following steps apply to error
codes 2402 - 01 through 2416 - 01:
2403 - 01 Video Attribute Test
1. Verify switch settings on the
2401 - 01 Video Character Set Test video board and system board.
2. Replace the video board and
2405 - 01 Video 80 x 25 Mode9x14 retest.
Character Cell Test 3. Replace the system board and
retest.
2406 - 01 Video 80 x 25 Mode8x8
Character Cell Test
2407 - 01 Video 40 x 25 Mode Test
2408 - 01 Video 320 x 200 Mode Color
Set 0 Test
2409 - 01 Video 320 x 200 Mode Color
Set 1 Test
2410 - 01 Video 640 x 200 Mode Test
2411 - 01 Video Screen Memory Page Test
2412 - 01 Video Gray Scale Test
Page 50
2414 - 01 Video White Screen Test
2416 - 01 Video Noise Pattern Test
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------2417 - 01 Lightpen text mode test The following steps apply to error
failed; no response. codes 2417 - xx.
2417 - 02 Lightpen text mode test 1. Check the switch settings on
failed; invalid response. the video board (see Chapter 9,
"Jumper and Switch Settings").
2417 - 03 Lightpen medium resolution 2. Replace the lightpen and
mode test failed; no response. retest.
3. Replace the video board and
2417 - 04 Lightpen medium resolution retest.
mode test failed; invalid 4. Replace the system board and
response. retest.
-----------------------------------------------------------------------------Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------2418 - 01 VGC memory test failed. The following steps apply to error
codes 2418 - xx through 2425 - xx.
2418 - 02 VGC and ECG shadow RAM test
failed. 1. Verify the switch settings.
2. Replace the video board and
2419 - 01 VGC and ECG ROM checksum retest.
test failed. 3. Replace the system board and
retest.
2420 - 01 VGC and ECG attribute test
failed.
2421 - 01 VGC and ECG 640 x 200
graphics mode test failed.
2422 - 01 VGC and ECG 640 x 350
16 color set test failed.
2423 - 01 VGC and ECG 640 x 350
64 color set test failed.
2424 - 01 VGC and ECG monochrome
text mode test failed.
2425 - 01 VGC and ECG monochrome
graphics mode test failed.
==============================================================================
Table 6-14. COMPAQ Dual Mode Plasma Display Error Codes (51xx - xx Range)
==============================================================================
Error
Code Error Description Recommended Action
-----------------------------------------------------------------------------5101 - 01 Video controller Test The following steps apply to error
codes 5101 - 01 through 5129 - 01:
5102 - 01 Video Memory Test
Page 51
1. Replace the plasma display
5103 - 01 Video Attribute Test controller board and retest.
2. Replace the plasma display
5104 - 01 Video Character Set Test and retest.
3. Replace the system board
5105 - 01 Video 80 x 25 Mode9x14 andretest.
Character Cell Test
5106 - 01 Video 80 x 25 Mode8x8
Character Cell Test
5107 - 01 Video 40 x 25 Mode Test
5108 - 01 Video 320 x 200 Mode Color
Set 0 Test
5109 - 01 Video 320 x 200 Mode Color
Set 1 Test
5110 - 01 Video 640 x 200 Mode Test
5111 - 01 Video Screen Memory Page Test
5112 - 01 Video Gray Scale Test
5114 - 01 Video White Screen Test
5116 - 01 Video Noise Pattern Test
5124 - 01 Monochrome Test
5129 - 01 Video 640 x 400 Mode Test
==============================================================================
Chapter 6.4 Memory Error Codes
Memory error codes result when the system detects a memory fault during the
Power On Self Test or as a result of a DIAGNOSTIC test. The TEST programs
attempt to isolate the memory fault to a specific chip, then generate a memory
error code that identifies the system board, memory board, or the defective
memory module to replace.
In some cases, replacing the memory module will not solve the problem because:
o The system may not be able to accurately determine which module is at fault
if multiple memory errors are detected.
o The problem may be due to a failure in the memory support circuitry, not
the memory.
The memory error code points to a specific memory address. The physical
location of the memory address depends on the memory expansion board or memory
module used.
Page 52
Defective Memory Isolation
Memory error codes are shown on the display in an 8 digit format (XX000Y ZZ).
The XX and Y alphanumeric codes are the key identification points for
defective memory isolation. Due to the design of the COMPAQ PORTABLE 386
Personal Computer, the remaining codes in the format are not required for
determining memory locations.
The 8 digit code is defined as follows:
XX 000 Y ZZ
|||||------- Failed data bit. Values are:
|| | | 00, 01, 02, 04, 08, 10, 20, 40, 80, ??. Ignore
||||
||||
|| | ---------- Failed byte. Values are:
|| | 0,1,2,3.
|| |
|| ------------- Always zero.
||
| ---------------- Reserved. Ignore.
|
----------------- Megabyte where error occurred.
Memory Locations
After identifying X and Y use Figures 6-1, 6-2, 6-3, and 6-4 to locate the
defective memory module or board. For information on removing and replacing
the system board or the memory options, see Chapter 8, "Removal and
Replacement Procedures."
Memory Replacement
Replace 512 Kbyte Memory Modules J1 through J8 with PN 107687-001.
Replace the 4 Megabyte Memory Expansion Board with PN 107688-001.
Replace the 4 Megabyte Memory Extension Board with PN 107685-001.
Page 53
Page 54
Page 55
Chapter 7. Illustrated Parts Catalog
Chapter 7.1 Introduction
This chapter provides a spare parts reference for the COMPAQ PORTABLE 386
Personal Computer.
The information in each section is presented in tabular form. Each table
contains the following columns:
o Description - name of the particular part or parts kit.
o Part Number - to be used when ordering parts from Compaq Computer
Corporation.
Tables 7-1 through 7-4 contain a third column that provides reference numbers
keyed to specific illustrations.
Table 7-5 lists spare parts for the various options available for the
COMPAQ PORTABLE 386 Personal Computer.
Tables 7-6 and 7-7 list parts that are available only in a kit, and each kit
has only one part number.
Chapter 7.2 Display Enclosure Assembly
Table 7-1 lists the spare parts for the COMPAQ PORTABLE 386 Personal Computer
display enclosure. Items numbered 1 through 8 are illustrated in Figure 7-1.
Items numbered 9 through 15 are illustrated in Figure 7-2.
Page 56
Table 7-1. Display Enclosure Assembly
==============================================================================
Item Description Part Number
------------------------------------------------------------------------------
1. COMPAQ Dual Mode Plasma Display 107381-001
2. Display Filter Assembly 107689-001
3. Display Enclosure 107043-001
4. Keyboard Connector Cover * 107120-001
5. Brightness Control Assembly 107384-001
6. Brightness Control Knob * 107121-001
7. Display Bezel 107044-001
(replaced by
107975-001)
8. Latch * 107221-001
9. Ground Plate 107560-001
10. Plasma Display Hinge * 107386-001
11. Display Power Cable Assembly ** 107382-001
12. Strain Relief Bracket * 107386-001
13. Display Data Cable Assembly ** 107382-001
14. Roller * 107386-001
Page 57
15. Mandrel * 107386-001
y
------------------------------------------------------------------------------
* Included in the Miscellaneous Hardware Kit (PN 107386-001).
** Included in the Cable Kit (PN 107382-001).
==============================================================================
Chapter 7.3 Portable Enhanced Keyboard Assembly
Table 7-2 lists the keyboard assembly for the COMPAQ PORTABLE 386 Personal
Computer, which is illustrated in Figure 7-3.
Table 7-2. Portable Enhanced Keyboard Assembly
==============================================================================
Item Description Part Number
------------------------------------------------------------------------------
1. Keyboard Assembly - Domestic 107672-001
2. Keyboard Assembly - United Kingdom 107674-001 *
3. Keyboard Assembly - German 107675-001 *
4. Keyboard Assembly - French 107676-001 *
5. Keyboard Assembly - Italian 107677-001 *
6. Keyboard Assembly - Spanish 107678-001 *
7. Keyboard Assembly - Danish 107679-001 *
8. Keyboard Assembly - Norwegian 107680-001 *
9. Keyboard Assembly - Swedish/Finnish 107681-001 *
10. Keyboard Assembly - Swiss 107682-001 *
11. Logo Kit 107690-001 *
------------------------------------------------------------------------------
* Not shown in Figure 7-3.
==============================================================================
Chapter 7.4 Chassis - Rear Assembl
Page 58
Table 7-3 lists the spare parts for the COMPAQ PORTABLE 386 Personal Computer
chassis rear assembly. Items numbered 1 through 14 are illustrated in
Figure 7-4, and items numbered 15 through 34 are illustrated in Figure 7-5.
Table 7-3. Chassis - Rear Assembly
==============================================================================
Item Description Part Number
------------------------------------------------------------------------------
1. Main Housing Enclosure 107072-002
2. Chassis Shield 107705-001
Page 59
3. Power Supply Ground Subassembly 107624-001
4. Battery 107786-001
5. System Board 107683-001
6. Microprocessor Cover 107617-001
7. System Board Cover 107704-001
8. Rear Panel 107168-001
9. AC Power Cord 101155-001
10. Interface Connector Cover 107737-001
11. 32 Bit Memory/Modem Interface Board 107684-001
12. System ROMs 107796-001
13. RGB Data Cable ** 107386-001
14. Options Compartment Shield 107799-001
15. Front Main Bezel 107034-001
(replaced by
107803-001)
16. Strain Relief Clip * 107386-001
17. Handle Assembly 107377-001
------------------------------------------------------------------------------
Item Description Part Number
------------------------------------------------------------------------------
18. Display Data Cable Assembly ** 107382-001
19. Spreader Plate 107292-001
20. Power Supply 107373-001
21. Second Serial Interface Board (International Only) 107871-001
22. COMPAQ 2400 Baud Internal Modem 107791-001
23. 2400 Baud Modem Bezel * 107387-001
24. COMPAQ 1200 Baud Internal Modem 107376-001
25. 1200 Baud Modem Bezel * 107387-001
26. Plasma Display Controller Board 107787-001
27. Display Controller Data Cable ** 107382-001
28. 4 Megabyte Memory Extension Board 107685-001
29. 4 Megabyte Memory Expansion Board 107688-001
30. 512 Kbyte Memory Module 107687-001
Page 60
31. 1 to 2 Megabyte Memory Expansion Board 107686-001
32. Display Data Cable Assembly ** 107382-001
33. LED/Speaker Cable 107926-001
34. Keyboard Cable (Internal) 107924-001
------------------------------------------------------------------------------
* Included in the Miscellaneous Hardware Kit (PN 107386-001).
** Included in the Cable Kit (PN 107382-001).
==============================================================================
Chapter 7.5 Chassis - Side Assembly
Table 7-4 lists the spare parts for the COMPAQ PORTABLE 386 Personal Computer
chassis side assembly, which is illustrated in Figure 7-6.
Table 7-4. Chassis - Side Assembly
==============================================================================
Item Description Part Number
------------------------------------------------------------------------------
1. Drive Bezel 107202-001 (No
2. 1.2 Megabyte Diskette Drive 107359-001
360 Kbyte Diskette Drive 107360-001
3 1/2 Inch 1.44 Megabyte Diskette Drive 109595-001
3. Diskette Drive Data Cable ** 107177-001
4. Diskette Drive Power Cable ** 101741-004
longer available)
Page 61
5. Mass Storage Device Enclosure 107131-004
6. Fixed Disk Drive Data Cable ** 107798-001
7. Fixed Disk Drive Power Cable ** 101741-003
8. 40 Megabyte Fixed Disk Drive (3:1) 107357-001
(replaced
by 142365-001)
40 Megabyte Fixed Disk Drive (1:1 Drive Type 17) 110358-001
(replaced
by 142365-001)
40 Megabyte Fixed Disk Drive (1:1 Drive Type 43) 114106-001
(replaced
by 142365-001)
100 Megabyte Fixed Disk Drive 107790-001
110 Megabyte Fixed Disk Drive 107982-001
9. Drive Bracket Assembly 107112-001
10. Drive Shoulder Bolts ** 107386-001
11. Drive Vibration Isolators ** 107386-001
12. Drive Cover 107480-001
------------------------------------------------------------------------------
* Included in the Miscellaneous Hardware Kit (PN 107386-001).
** Included in the Cable Kit (PN 107382-001).
==============================================================================
Chapter 7.6 Spare Parts for Options
Table 7-5 lists spare parts for the options available for the COMPAQ PORTABLE
386 Personal Computer and their part numbers. The spare parts are illustrated
in Figures 7-7 through 7-17.
Page 62
Page 63
Page 64
Page 65
Page 66
Table 7-5. Spare Parts for Options
==============================================================================
Description Part Number
------------------------------------------------------------------------------
32 Bit Memory/Modem Interface Board 107684-001
1 to 2 Megabyte Memory Expansion Board 107686-001
512 Kbyte Memory Module 107687-001
Page 67
4 Megabyte Memory Expansion Board 107688-001
4 Megabyte Memory Extension Board 107685-001
COMPAQ 1200 Baud Internal Modem 107376-001
COMPAQ 2400 Baud Internal Modem 107791-001
Second Serial Interface Board (International) 107871-001
Expansion Unit (complete) 107453-001
Tape Drive Expansion Unit 107785-001
Tape Cartridge (40 Megabyte) 108142-001
Video Graphics Controller Board 109253-001
Video Graphics Color Monitor 109255-001
Video Graphics Monochrome Monitor 109254-001
Intel 80387 (20 MHz) Coprocessor 113220-001
Weitek 3167 Coprocessor 115517-001
------------------------------------------------------------------------------
300/600 Megabyte Fixed Disk Drive Expansion Unit
------------------------------------------------------------------------------
External Fixed Disk Drive Controller Board 115839-001
I/O Cable 115810-001
(replaced by
130844-001)
External Interface Adapter Board 115838-001
Power Supply 108065-001
Power Cord 101155-001
300 Megabyte Fixed Disk Drive 113219-001
Signal Cable (34 position) 115812-001 *
Signal Cable (20 position) 115812-001 *
Universal Drive Power Cable 101137-001
Expansion Unit Cover and Bezel
United States 115804-001
International 115804-002
Logo, Kit 115836-001
------------------------------------------------------------------------------
* Contained in the External Fixed Disk Drive Cable Kit (PN 115812-001)
==============================================================================
Chapter 7.7 Cable Kit
Page 68
Table 7-6 lists the spare parts in the cable kit (PN 107382-001) for the
COMPAQ PORTABLE 386 and COMPAQ PORTABLE III Personal Computers.
Table 7-6. Cable Kit
==============================================================================
Description Quantity
------------------------------------------------------------------------------
Diskette Drive Data Cable 1
Diskette Drive Power Cable 1
Fixed Disk Drive Data Cable (COMPAQ PORTABLE III) 1
Fixed Disk Drive Power Cable (COMPAQ PORTABLE III) 1
Display Data Cable Assembly 1
Display Power Cable Assembly 1
RGB Data Cable 1
Fixed Disk Drive Data Cable (COMPAQ PORTABLE 386) 1
Fixed Disk Drive Power Cable (COMPAQ PORTABLE 386) 1
Modem Cable 1
Display Controller Data Cable 1
==============================================================================
Chapter 7.8 Miscellaneous Hardware Kit
Table 7-7 lists the spare parts in the Miscellaneous Hardware Kit
(PN 107386-001) for the COMPAQ PORTABLE 386 and COMPAQ PORTABLE III Personal
Computers.
Table 7-7. Miscellaneous Hardware Kit
==============================================================================
Description Quantity
------------------------------------------------------------------------------
Screw - Power Supply/Drive Enclosure 25
Screw - Rear Panel Long 25
Screw - Rear Panel Short 10
Drive Shoulder Bolt 10
Drive Vibration Isolators 10
Cable Tie, 3/4 inch wide, 3 7/8 inch wide 50
Strain Relief Bracket 2
Strain Relief Clip 2
Brightness Control Knob 5
Mandrel 2
Roller 4
Plasma Display Hinge 2
Latch 4
Keyboard Connector Cover 5
Modem Bezel 2
Keyboard Skid Pad 5
Blank Modem Bezel 2
LED 1
==============================================================================
Page 69
Chapter 8. Removal and Replacement Procedures
Chapter 8.1 Introduction
Before starting the removal procedures, review Chapter 7, "Illustrated Parts
Catalog," to become familiar with the various part numbers and locations.
After completing all removal and replacement procedures, run the DIAGNOSTICS
Program on the COMPAQ PORTABLE 386 Personal Computer to verify the proper
operation of the replaced component.
Chapter 8.2 Preparation Procedure
Before beginning the procedures in this chapter, complete the following steps:
1. Turn off the computer.
2. Disconnect any peripheral devices (printer, monitors, and so on) from the
computer.
3. Disconnect the AC power cord from the AC outlet and from the computer
(Figure 8-1).
Chapter 8.3 Keyboard Assembly
To remove the keyboard assembly:
Page 70
1. Complete the preparation procedure (see Section 8.2).
2. Detach the keyboard from the system unit.
3. Grasp the keyboard cord near where it connects to the computer. Gently
pull it away from the keyboard connector on the computer (Figure 8-2).
4. Slide the keyboard connector cover off of the keyboard cord and set it
aside (Figure 8-3).
Page 71
To replace the keyboard assembly, reverse steps 1 through 4.
Chapter 8.4 Rear Panel
To remove the rear panel:
1. Complete the preparation procedure (see Section 8.2).
2. Place the computer keyboard side down on a level surface with the rear
panel facing upward.
3. Remove the six screws and washers that secure the rear panel to the
computer (Figure 8-4). Note that the two screws you removed from the
center position are shorter than the other four screws.
4. Carefully pull the rear panel away from the computer and set it aside.
To replace the rear panel:
1. Place the rear panel on the computer.
2. Insert the two shorter screws and washers in the center holes.
3. Insert the four remaining screws and washers in the corner holes.
4. Start all six screws before completely tightening them.
5. Beginning with the center screws, tighten each screw.
Page 72
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
CAUTION
Do not overtighten the screws.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Chapter 8.5 Interface Connector Cover
The interface connector cover protects the 32 bit memory/modem interface
connector when nothing is installed in the options compartment. This cover
must be removed before either modem, the second serial interface board, or
any of the memory expansion boards can be installed.
To remove the interface connector cover:
1. Complete the preparation procedure (see Section 8.2).
2. Remove the rear panel (see Section 8.4).
3. Locate the interface connector cover shown in Figure 8-5.
4. Remove the three screws securing the interface connector cover and set
them aside.
5. Remove the interface connector cover from the system board and set it
Page 73
aside (Figure 8-6).
To replace the interface connector cover, reverse steps 1 through 5.
Chapter 8.6 Microprocessor Cover
To remove the microprocessor cover:
1. Complete the preparation procedure (see Section 8.2).
2. Remove the rear panel (see Section 8.4).
3. Locate the microprocessor cover shown in Figure 8-7.
Page 74
4. Grasp the microprocessor cover at its edges; gently lift it up and away
from the system board and set it aside (Figure 8-8).
To replace the microprocessor cover, reverse steps 1 through 4.
NOTE: Position the cover so that the edges slanted in go inside the fence and
those slanted out go outside the fence. Press the cover securely into place
by working from one end to the other.
Page 75
Chapter 8.7 System Board Cover
To remove the system board cover:
1. Complete the preparation procedure (see Section 8.2).
2. Remove the rear panel (see Section 8.4).
3. Remove the interface connector cover, if installed (see Section 8.5).
4. Remove the 32 bit memory/modem interface board, if installed (see
Section 8.8).
5. Remove the microprocessor cover (see Section 8.6).
6. Locate the system board cover shown in Figure 8-9.
7. Remove the screws that secure the system board cover to the system board
assembly and set them aside.
8. Lift the system board cover up and away from the computer and set it
aside (Figure 8-10).
To replace the system board cover, reverse steps 1 through 8.
Page 76
Chapter 8.8 32 Bit Memory/Modem Interface Board
The 32 bit memory/modem interface board connects the memory expansion boards,
either internal modem, and the second serial interface board to the system
board. If one or a combination of these options is installed, the 32 bit
memory/modem interface board will also be in place.
To remove the 32 bit memory/modem interface board:
1. Complete the preparation procedure (see Section 8.2).
2. Remove the rear panel (see Section 8.4).
3. Locate the 32 bit memory/modem interface board shown in Figure 8-11.
Page 77
4. Remove the screws securing the 32 bit memory/modem interface board and
set them aside.
5. Grasp the 32 bit memory/modem interface board at its edges and, without
rocking it, lift it straight up and away from the computer (Figure 8-12).
When the 32 bit memory/modem interface board is removed, the options
compartment with its two expansion slots is revealed (Figure 8-13).
Page 78
The top slot holds the second serial interface board or one of the internal
modems. Both the COMPAQ 1200 Baud Internal Modem and the COMPAQ 2400 Baud
Internal Modem, are approved for use with the COMPAQ PORTABLE 386 Personal
Computer.
The second slot allows memory expansion using any of three different memory
expansion board combinations (see Section 8.8).
To replace the 32 bit memory/modem interface board, reverse steps 1 through 4.
Chapter 8.9 Internal Modems
To remove either the COMPAQ 1200 Baud Internal Modem or COMPAQ 2400 Baud
Internal Modem:
1. Complete the preparation procedure (see Section 8.2).
2. Remove the rear panel (see Section 8.4).
3. Remove the 32 bit memory/modem interface board (see Section 8.8).
4. Press the top tab and disconnect the LED/speaker and keyboard cables from
the system board (Figure 8-14).
Page 79
5. Locate the internal modem and modem ground bracket shown in Figure 8-15.
6. Remove the one screw that secures the modem ground bracket to the system
board (Figure 8-16).
Page 80
7. Remove the modem bezel (Figure 8-17).
8. Slide the internal modem out of the options compartment and set it aside
(Figure 8-18).
Page 81
To replace the internal modem option, reverse steps 1 through 8.
Chapter 8.10 Second Serial Interface Board (International Only)
To remove the second serial interface board:
1. Complete the preparation procedure (see Section 8.2).
2. Remove the rear panel (see Section 8.4).
3. Remove the 32 bit memory/modem interface board (see Section 8.8).
4. Press the top tab and disconnect the LED/speaker and keyboard cables from
the system board (Figure 8-19).
Page 82
5. Locate the second serial interface board shown in Figure 8-20.
6. Slide the second serial interface board out of the options compartment and
set it aside (Figure 8-21).
Page 83
To replace the second serial interface board, reverse steps 1 through 6.
Chapter 8.11 Memory Expansion Boards
Three memory expansion boards are available for the COMPAQ PORTABLE 386
Personal Computer:
o 1 to 2 Megabyte Memory Expansion Board, which comes standard with four
sockets and one megabyte of random access memory (RAM). The one megabyte
of RAM is in the form of a memory upgrade kit (two 512 Kbyte memory
modules), which is installed in two of the sockets. A second memory
upgrade kit can be added to bring the memory expansion board up to its two
megabyte capacity. This board cannot be used in combination with either
the 4 megabyte memory expansion board or the 4 megabyte memory extension
board.
o 4 Megabyte Memory Expansion Board comes standard with four megabytes of
RAM surface mounted to the board. This board may be used alone or in
combination with the 4 megabyte memory extension board.
o 4 Megabyte Memory Extension Board also comes standard with four megabytes
of RAM surface mounted to the board. However, this board can be used only
when connected to the 4 megabyte memory expansion board.
Each memory expansion board (or combination) fits into the same options
compartment slot in the COMPAQ PORTABLE 386 Personal Computer.
The diagram on the following for a quick reference to the memory expansion
process.
NOTE: Memory expansion boards cannot be added until the system board is
fully populated with two megabytes of RAM.
Page 84
To remove a memory expansion board:
1. Complete the preparation procedure (see Section 8.2).
2. Remove the rear panel (see Section 8.4).
3. Remove the 32 bit memory/modem interface board (see Section 8.8).
4. Press the top tab and disconnect the LED/speaker and keyboard cables from
the system board (Figure 8-22).
Page 85
5. Locate the memory expansion board shown in Figure 8-23.
6. Slide the memory expansion board out of the options compartment and set
it aside (Figure 8-24).
Page 86
To replace the memory expansion board, reverse steps 1 through 6.
Chapter 8.12 Memory Upgrade Kit
Each 1 megabyte memory upgrade kit consists of two 512 Kbyte memory modules,
which are surface mounted with four 256K x 4, 80 ns RAM chips and two
256K x 1, 80 ns RAM chips.
The memory upgrade kits are used on the system board to expand its base one
megabyte of standard RAM to two megabytes. The memory upgrade kits also
provide the memory capacity of the 1 to 2 megabyte memory expansion board.
To remove a memory module from the system board:
1. Complete the preparation procedure (see Section 8.2).
2. Remove the rear panel (see Section 8.4).
3. Remove the system board cover (see Section 8.6).
4. Locate the memory module that is to be replaced (Figure 8-25).
Page 87
5. To release the module, insert a tool, such as a ball point pen, into the
hole at one end of the module.
6. Grasp the end of the module, pull up, and "peel" it away from its socket
(Figure 8-26).
To replace the memory module, simply reinsert it into its socket, then reverse
steps 1 through 3.
To remove a memory module from the 1 to 2 megabyte memory expansion board:
Page 88
1. Complete the preparation procedure (see Section 8.2).
2. Remove the rear panel (see Section 8.4).
3. Remove the 32 bit memory/modem interface board (see Section 8.8).
4. Remove the 1 to 2 megabyte memory expansion board (see Section 8.11).
5. Locate the memory module that is to be replaced (Figure 8-27).
6. To release the module, insert a tool, such as a ball point pen, into the
hole at one end of the module.
7. Grasp the end of the module, pull up, and "peel" it away from its socket
(Figure 8-28).
Page 89
To replace the memory module, simply reinsert it fully into its socket, then
reverse steps 1 through 5.
Chapter 8.13 System ROM
To remove the system ROM:
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
The ROMs are sensitive to static electricity and are shipped on conductive
foam to protect them from accidental electrostatic discharge. Do not remove
them from the conductive shipping foam until you are ready to install them.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1. Complete the preparation procedure (see Section 8.2).
2. Remove the rear panel (see Section 8.4).
3. Remove the interface connector cover, if installed (see Section 8.5).
4. Remove the microprocessor cover (see Section 8.6).
5. Remove the system board cover (see Section 8.7).
CAUTION
6. Remove the 32 bit memory/modem interface board, if installed (see
Section 8.8).
7. Locate the system ROM shown in Figure 8-29.
Page 90
8. Using an IC removal tool, remove the system ROM (Figure 8-30).
9. Using an IC insertion tool, insert the new ROM into the appropriate
sockets (Figure 8-31).
Page 91
Chapter 8.14 System Board
NOTE: The system board and the base pan are one assembly and are removed
simultaneously.
To remove the system board assembly:
1. Complete the preparation procedure (see Section 8.2).
2. Remove the rear panel (see Section 8.4).
3. Remove the interface connector cover, if installed (see Section 8.5).
4. Remove the 32 bit memory/modem interface board, if installed (see
Section 8.8).
5. Remove the microprocessor cover (see Section 8.6).
6. Remove the system board cover (see Section 8.7).
7. Remove the internal modem, if installed (see Section 8.9).
8. Remove the second serial interface board, if installed (see Section 8.10).
9. Remove the memory expansion board, if installed (see Section 8.11).
10. Disconnect the following cables (shown in Figure 8-32) from the system
board:
o System board power cable
o Diskette drive data cable
o Diskette drive power cable
o Fixed disk drive data cable
Page 92
o Fixed disk drive power cable
o LED/speaker cable
o Keyboard cable
o Display controller board data cable
o Battery cable
11. Remove the screws that secure the system board assembly to the main
enclosure (Figure 8-33).
NOTE: Use a 3/16 inch wrench to remove the standoffs and a Torx screwdriver
to remove the screws.
Page 93
12. Grasp the system board assembly by its edges. Lift it up and away from
the main enclosure.
13. Disconnect the RGBI cable assembly from the plasma display controller
board (Figure 8-34).
To replace the system board, reverse steps 1 through 13.
Page 94
Chapter 8.15 Plasma Display Controller Board
To remove the plasma display controller board:
1. Complete the preparation procedure (see Section 8.2).
2. Remove the rear panel (see Section 8.4).
3. Remove the interface connector cover, if installed (see Section 8.5).
4. Remove the 32 bit memory/modem interface board, if installed (see
Section 8.8).
5. Remove the microprocessor cover (see Section 8.6).
6. Remove the system board cover (see Section 8.7).
7. Remove the internal modem, if installed (see Section 8.9).
8. Remove the second serial interface board, if installed (see Section 8.10).
9. Remove the memory expansion board, if installed (see Section 8.11).
10. Remove the system board (see Section 8.14).
11. Locate the controller board shown in Figure 8-35.
12. Carefully slide the controller board from its compartment (Figure 8-36).
Page 95
NOTE: Removing the controller board from its compartment also disconnects it
from the display data cable.
13. Disconnect the display controller board data cable from the controller
board (Figure 8-37).
To replace the controller board, reverse steps 1 through 13.
Page 96
Chapter 8.16 Mass Storage Device Assembly
To remove the mass storage device subassembly:
1. Complete the preparation procedure (see Section 8.2).
2. Remove the rear panel (see Section 8.4).
3. To remove the drive bezel, place your thumb on the rear side of the
drive bezel.
4. Pull the drive bezel away from the computer with your thumb.
(Figure 8-38).
5. Disconnect the following cables (shown in Figure 8-39) from the system
board:
o Diskette drive data cable
o Diskette drive power cable
o Fixed disk drive data cable
o Fixed disk drive power cable
Page 97
6. Locate the mass storage device subassembly shown in Figure 8-40.
7. Remove the screw that secures the mass storage device subassembly to the
mass storage device enclosure (Figure 8-41).
Page 98
8. Slide the mass storage device subassembly out of the mass storage device
enclosure (Figure 8-42).
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
CAUTION
When removing the mass storage device subassembly, be sure that the cables do
not interfere with the mass storage device enclosure.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Page 99
To replace the mass storage device subassembly, reverse steps 7 and 8.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
CAUTION
When replacing the mass storage device subassembly, be sure that the cables do
not interfere with the mass storage device enclosure.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Reconnect the cables, listed in step 5, to the system board.
To replace the bezel and rear panel, reverse steps 1 through 4.
Chapter 8.17 Fixed Disk Drive
To remove the fixed disk drive assembly:
1. Complete the preparation procedure (see Section 8.2).
2. Remove the rear panel (see Section 8.4).
3. Remove the mass storage device subassembly (see Section 8.12).
4. Locate the fixed disk drive (Figure 8-43) mounted in the rear position of
the mass storage device subassembly (Drive Position 2).
5. Disconnect the fixed disk drive power and data cables from the fixed disk
drive (Figure 8-44).
Page 100
6. Remove the two screws that secure the drive cover or metal plate
covering the front of Drive Position 2 (Figure 8-45).
Loading...