Compaq SLT/286 - User Manual

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.
1990 Compaq Computer Corporation.
All rights reserved. Printed in the USA.
COMPAQ, DESKPRO, Registered United States Patent and Trademark Office.
SYSTEMPRO is a trademark of Compaq Computer Corporation.
The software described in this guide is furnished under a license agreement or
nondisclosure agreement. The software may be used or copied only in
accordance with the terms of the agreement.
Product names mentioned herein may be trademarks and/or registered trademarks
of their respective companies.
MAINTENANCE AND SERVICE GUIDE
COMPAQ SLT 386s/20 PERSONAL COMPUTER,
COMPAQ SLT/286 PERSONAL COMPUTER
First Edition (June 1990)
Text PN 118385-001
Preface
THE MAINTENANCE AND SERVICE GUIDE COMPAQ SLT 386s/20 PERSONAL COMPUTER,
COMPAQ SLT/286 PERSONAL COMPUTER is a troubleshooting guide. It can be used
as a reference when servicing the COMPAQ SLT 386s/20, Model 60 and Model 120,
or the COMPAQ SLT/286, Model 20 and Model 40. Compaq Computer Corporation
reserves the right to make changes to the computers without notice. The
diagrams and procedures in this document apply to these computers. Diagnostic
tests are designed to test only these products.
Interpreting Symbols
WARNING: TEXT SET OFF IN THIS MANNER INDICATES THAT FAILURE TO FOLLOW
DIRECTIONS IN THE WARNING COULD RESULT IN BODILY HARM OR LOSS OF LIFE.
CAUTION: TEXT SET OFF IN THIS MANNER INDICATES THAT FAILURE TO FOLLOW
DIRECTIONS COULD RESULT IN DAMAGE TO EQUIPMENT OR LOSS OF DATA.
IMPORTANT: Text set off in this manner presents clarifying information or
specific instructions.
NOTE: Text set off in this manner presents commentary sidelights, or
interesting points of information.
Locating Additional Information

Compaq SLT/286 Specifications

General

Manufacturer	Compaq
Model	SLT/286
Category	Laptop
Release Year	1988
Processor	Intel 80286
Processor Speed	12 MHz
Operating System	MS-DOS
RAM	640 KB
Storage	20 MB HDD
Weight	6.4 kg
Battery Life	3 hours
Battery	NiCad
Ports	Serial, parallel

Summary

Chapter 1 - Specifications

System Unit Specifications

Detailed physical dimensions and weight for the system unit.

Fixed Disk Drive Specifications

Technical details for 120 MB and 60 MB fixed disk drives.

Chapter 2 - Power On Self Test (POST)

Introduction to POST

Overview of POST, its purpose, and detected subassemblies.

Preliminary Steps for Error Conditions

Actions to take before troubleshooting errors, including power and device management.

Problem Isolation Flowchart

Guide for identifying and correcting malfunctions during POST.

Chapter 3 - Error Messages and Codes

Introduction to Error Codes

Explains the types of error codes and their presentation in tables.

Power On Self Test (POST) Messages

Lists POST error messages, beeps, causes, and recommended actions.

Diagnostic Error Codes

Details diagnostic error codes and steps to resolve them.

Memory Error Codes

Explains memory error code format and interpretation for fault isolation.

Chapter 5 - Removal and Replacement Procedures

Introduction to Procedures

Module-level procedures for component removal and replacement.

Tool and Software Requirements

Disassembly;Assembly Sequence Chart

Preparation Procedures

Memory Board Removal

Internal Power Supply Removal

Mass Storage Devices Removal

System Board Removal

Detailed steps for removing and reinstalling the system board.

VGA Backlit Display Removal

Procedures for removing the LCD panel and related display components.

Chapter 6 - Jumper and Switch Information

COMPAQ SLT 386 s;20 System Board Settings

COMPAQ SLT;286 System Board Settings