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 1994 Compaq Computer Corporation. All rights reserved. Printed in the U.S.A. Compaq, Deskpro, LTE, Contura Registered U.S. Patent and Trademark Office. LTE Elite, SmartStation, and MiniStation are trademarks of Compaq Computer Corporation. Microsoft and MS-DOS are registered trademarks of Microsoft Corporation. Windows is a trademark of Microsoft 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 LTE ELITE FAMILY OF PERSONAL COMPUTERS COMPAQ SMARTSTATION First Edition (March 1994) Part Number 194061-001 Preface USING THIS GUIDE This Maintenance And Service Guide is a troubleshooting reference for servicing the Compaq LTE Elite Family of Personal Computers, the Compaq SmartStation, the Compaq MiniStation/EN, and the Compaq MiniStation/TR. The guide is organized into the following parts: o Part 1: Compaq LTE Elite Computer (Chapters 1 through 5) o Part 2: Compaq SmartStation (Chapters 6 through 10) o Appendices Compaq Computer Corporation reserves the right to make changes to the Compaq LTE Elite Family of Personal Computers and its options without notice. SYMBOLS AND CONVENTIONS The following format conventions distinguish elements of the text throughout this guide: o When keys must be pressed at the same time, the action is represented by the key names and the plus (+) symbol. For example, Ctrl+Alt+Delete. o The names of files are presented in uppercase, as shown here: FILENAME. o The names of commands or directories are presented in uppercase type as shown here: COMMAND or DIRECTORY. Commands that are to be entered at the system prompt are shown on a separate line. o When you are asked to type something without pressing the Enter key, you are directed to "type" the information. o When you need to type information and press the Enter key, you are directed to "enter" the information. The following words and symbols mark special messages throughout this guide: >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 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 information. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 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. TECHNICIAN NOTES >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Only authorized technicians trained by Compaq Computer Corporation should attempt to repair this equipment. All troubleshooting and repair procedures are detailed to allow only subassembly/module level repair. Because of the complexity of the individual boards and subassemblies, no one should attempt to make repairs at the component level or to make modifications to any printed circuit board. Improper repairs can create a safety hazard. Any indication of component replacement or printed circuit board modifications may void the warranty or exchange allowances. To properly ventilate the computer or the expansion base, allow at least 3 inches (7.62 cm) of clearance at the back and sides of the units. To avoid the risk of electric shock or damage to the computer or expansion base, ensure that all power sources (including the battery pack in the computer) are disconnected before removing and replacing internal parts. Compaq SmartStation. The Compaq SmartStation expansion base is designed for connection to a grounded (earthed) electrical outlet. The grounding type plug is an important safety feature. To avoid the risk of electric shock or damage to the equipment, do not disable this feature. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< LOCATING ADDITIONAL INFORMATION The following documentation is available to support the Compaq LTE Elite Family of Personal Computers and its options. o Documentation included with the computer: - Online USER'S GUIDE - QUICK SETUP card - BEYOND SETUP GUIDE o COMPAQ SMARTSTATION INSTALLATION AND OPERATIONS GUIDE o COMPAQ MINISTATION INSTALLATION GUIDE o COMPAQ SERVICE QUICK REFERENCE GUIDE o Compaq QuickFind o Compaq Service Advisories and Bulletins Chapter 1 - Compaq LTE Elite Product Overview Introduction This chapter is an overview of the Compaq LTE Elite Family of Personal Computers and covers the following topics: o Serial number o System overview o Models and features o Controls and LEDs o Connectors o Functional descriptions o Docking options o Running Computer Setup o Reprogrammable flash ROM o Power Management o Security 1.1 Serial Number The computer serial number should be provided to Compaq whenever requesting information or ordering spare parts. The serial number is located above the connectors behind the input/output (I/O) connector cover. 1.2 System Overview The Compaq LTE Elite has the following upgradeable assemblies: o Hard drive o Display assembly o Processor board o RAM memory expansion board The Compaq LTE Elite is designed to dock in one of the following options: o Compaq SmartStation (Figure 1-1) o Compaq LTE Lite Desktop Expansion base (with a Compaq LTE Lite Upgrade Adapter) o Compaq MiniStation/EN or Compaq MiniStation/TR When docked in one of these options, the computer has the following additional features: o A single connection that provides multiple pass-through connections to options such as a printer, monitor, and other external equipment o Built-in network and SCSI-2 capability (on the Compaq SmartStation and Compaq MiniStations only) o Two internal drive bays (on the expansion bases only) o Two full size 8-/16-bit Industry Standard Architecture (ISA) expansion slots (on the expansion bases only) Computer power is supplied through one of the following sources: o An internal battery pack o The computer's internal AC adapter when connected to the power cord (Figure 1-2) o The computer's internal AC adapter when docked in a convenience base o The 198-pin external options connector when docked in an expansion base (provides DC power) o Automobile Adapter (provides DC power) 1.3 Models And Features Models Table 1-1 lists the Compaq LTE Elite models and model-specific features. Table 1-1. Compaq LTE Elite Computer Models =========================================================================== Internal Model Display Processor Cache RAM Hard Drive =========================================================================== 4/75CX 9.5" Color TFT 486 DX4/75 MHz 16 KB 8 MB 340 or 510 MB 4/50CX 9.5" Color TFT 486 DX2/50 MHz 8 KB 8 MB 340 MB 4/40CX 8.4" Color TFT 486 DX2/40 MHz 8 KB 4 MB 170 or 340 MB 4/50E 9.5" Mono TFT 486 DX2/50 MHz 8 KB 4 MB 250 MB 4/40C 9.5" Color STN 486 DX2/40 MHz 8 KB 4 MB 170 MB =========================================================================== Features All models of the computer have the following features: o Internal AC adapter o Upgradeable SL Enhanced Intel486 microprocessors o User upgradeable display with integrated trackball o Local bus graphics and graphics accelerator with 1024 x 768 external video support o Simultaneous display capability o Removable 2.5-inch hard drive o Reprogrammable flash ROM (Section 1.9) o 4 MB system RAM expandable to 20 MBs or 8 MB system RAM expandable to 24 MBs. The following memory expansion boards are available (Section 1.6): -4MB -8MB -16MB o 1.44 MB/720 kilobyte (and 1.2 MB Japanese standard), 3.5-inch diskette drive o Internal dynamic speaker o Internal 101-/102-key compatible keyboard (Enhanced III type with 12 function keys) o External keyboard/mouse support o External numeric keypad support o Enhanced parallel port (EPP 1.9) o PCMCIA slot, capable of handling one of the following card combinations: - Two PCMCIA Type I or Type II cards - One PCMCIA Type III card o Nickel metal hydride (NiMH) battery pack o Battery power management features, including the following: - Four levels of power management - Advanced Power Management (APM) - Standby - Hibernation - Screen save - Hard drive idle - PCMCIA slot power management - Battery gauge - Auxiliary battery (to protect data during battery pack replacement) o AC power management features including the following: - Standby - Hard drive idle - Screen save o Saving of changes to hotkey settings when computer is turned off o Electronic security features o The following preinstalled software: - MS-DOS and Microsoft Windows - TabWorks utility (alternative to Program Manager) - Computer Setup, Computer Checkup, Power Management, and Security Management