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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):
- 4 MB
- 8 MB
- 16 MB
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 utilities
- Automatic PCMCIA configuration utilities for MS-DOS and Windows
- Windows-based online documentation
- Plug and Play BIOS
- MS-DOS- and Windows-based shutdown capability (for closing out
applications and turning off computer)
- Microsoft Video for Windows Runtime Version
- Adaptec 6360 SCSI drivers
- Universal Netware Client for simplified setup of a Netware network
- Intel Ethernet drivers and TI Token Ring drivers for networks other
than Netware
- Western Digital WIN graphics drivers
- Logitech Trackball drivers
1.4 Controls And Leds
This section covers the computer controls and LEDs (Figure 1-3).
1. Caps lock LED
2. Display switch
3. Scroll lock LED
4. Num lock LED
5. Power switch
6. Standby button
7. Power/standby LED
8. Hard drive LED
9. Diskette drive LED
10. Power/standby LED
11. Battery LED
12. Trackball
13. Trackball buttons
14. Display control slide(s)
LEDs
Table 1-2 lists the function of the LEDs.
Table 1-2. LEDs
===========================================================================
LED Name Status Indication Location Color
===========================================================================
Power/ On Power on LED on top of unit Green
standby Flashing Standby (active when display is
open). Identical LED on
front of unit (active
when display is closed).
---------------------------------------------------------------------------
Battery On Battery Front of unit Orange
State charging
Flashing LowBatt 1
at one
per
second
Flashing LowBatt 2
at two
per
second
---------------------------------------------------------------------------
Hard Drive On Hard drive Front of unit Green
Activity being
accessed
---------------------------------------------------------------------------
Diskette On Diskette Front of unit Green
Drive drive being
Activity accessed
---------------------------------------------------------------------------
Scroll On Scroll lock Top of unit Green
Lock selected
---------------------------------------------------------------------------
Caps Lock On Caps lock Top of unit Green
selected
---------------------------------------------------------------------------
Num Lock On Num lock Top of unit Green
selected
===========================================================================
Display Switch
The computer has a display switch mounted on the power interface board
(PIB) located near the display hinge. When the display is closed, this
switch activates the front-mounted power/standby LED and simultaneously
deactivates the display and the top-mounted LEDs.
Trackball
The computer has an integrated PS/2 style trackball located on the display
bezel. The trackball is disabled whenever an external mouse is connected to
the keyboard/mouse connector. The trackball buttons are located on the back
side of the display.
1.5 Connectors
This section covers the I/O pass-through connectors on the computer
(Figure 1-4). Refer to Appendix A for connector pin assignments.
1. AC power
2. Automobile Adapter
3. Serial
4. 198-pin external options
5. Keyboard/mouse
6. Parallel
7. External monitor
8. Numeric keypad
9. PCMCIA
AC Power Connector
When the computer is docked in the convenience base and the convenience
base is turned on, AC power is applied to the computer's AC power
connector. (The 198-pin connector carries all other signals between the two
units.)
Automobile Adapter Connector
The computer has an automobile adapter connector that accepts an 18.5 volt,
1.73 amp DC input from the Automobile Adapter. This connector is covered
by an access door (Figure 1-5).
NOTE: The automobile adapter converts 12 volts DC from the automobile to
18.5 volts DC for use by the computer.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
The computer has an access door for the automobile adapter connector that
is designed to allow only one type of power input (AC or DC) to be
connected at a time (Figure 1-5). Do not attempt to defeat this protective
feature of the door or internal damage to the computer may result.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Serial Connector
The serial connector supports the serial interface which meets EIA RS232C
specifications.
198-Pin External Options Connector
The 198-pin external options connector handles the signal interface between
the computer and the expansion base or convenience base.
NOTE: When connected to an expansion base, power to the computer is carried
through the 198-pin connector (DC power).
Keyboard/Mouse Connector
The keyboard/mouse connector can be connected to a PS/2 mouse or an external
enhanced keyboard. Connecting the mouse/keyboard connector to a mouse
disables the integrated trackball, while connecting the mouse/keyboard
connector to an external keyboard disables the internal keyboard.
Parallel Connector
The parallel connector supports the parallel interface which meets
EPP 1.9 specifications.
External Monitor Connector
The external monitor connector provides an output for an external monitor
with a maximum resolution of 1024 x 768 lines.
NOTE: The computer can simultaneously display on an external monitor and
the integrated display panel.
Numeric Keypad
Connecting the numeric keypad connector to an external numeric keypad
disables the embedded numeric keypad feature.
PCMCIA Connector
The computer has a PCMCIA connector accessible through a PCMCIA slot on the
left side of the computer (refer to "PCMCIA Slot" in Section 1.6). The
PCMCIA connector supports the PCMCIA interface which meets PCMCIA 2.1
specifications.
1.6 Functional Descriptions
This section covers functional descriptions of key parts and features of
the computer. For assembly/disassembly instructions for the parts described
in this section, refer to Chapter 4.
System Board
The system board (Figure 1-6) provides the following:
o Connector for removable hard drive [1]
o PCMCIA connector [2] (refer to "PCMCIA Slot")
o Board-to-board connection to the following devices:
- Power interface board (PIB) [3]
- Processor board [4]
- Memory expansion board (on underside of system board)
o Cable connection to the following devices:
- Internal AC power supply board [5]
- Fan [6]
- Internal keyboard [7]
- Display [8]
- Diskette drive [9]
- LED cable assembly for front-mounted LEDs (on underside of system board)
o Battery charging circuitry and battery contacts [10] for battery pack
o External input/output (I/O) connectors (Figure 1-4)
o DC-to-DC power supply (refer to "DC-to-DC Power Supply" in this section)
o 256 Kbyte flashable shared system ROM and keyboard ROM
o 4 or 8 MB base RAM (depending on the model)
o System controller, which provides the following:
- Interface to the processor board for memory management (including
memory refresh)
- Two DMA controllers
- Two interrupt controllers
- Clock generator
- Programmable interval timer
- System management interrupt (SMI) support logic
- Power management features
o Peripheral controller, which provides the following:
- Integrated keyboard controller
- Industry Standard Architecture (ISA) support logic
- Circuit for interfacing to the hard drive
- Control of parallel and serial interfaces, including serial interfaces
for a numeric keypad, mouse/keyboard, and internal trackball
o PCMCIA controller
o Local bus video controller
o Diskette drive controller
o Docking sense logic
o Secondary temperature sensor for controlling the fan (refer to
"Temperature Sensors")
DC-to-DC Power Supply
The DC-to-DC power supply is integrated into the system board. It converts
DC voltage input to regulated 3.3 volts, 5 volts, and 12 volts DC. The DC
voltage input comes from one of the following sources:
o Internal AC power supply
o Battery pack
o Automobile adapter
o 198-pin external options connector (from expansion base)
o Auxiliary battery
To replace the DC-to-DC power supply, the system board must be replaced.
Processor Board
The SL Enhanced Intel486 processor has an integrated coprocessor and is
upgradeable by replacing the processor board (Figure 1-7). The system
automatically adjusts to the new configuration. In addition, the processor
board contains the primary temperature sensor (refer to "Temperature
Sensors").
Some models have a heat sink attached. The computer comes with one of the
following processors:
o 486 DX4/75 MHz
o 486 DX2/50 MHz
o 486 DX2/40 MHz
NOTE: The 75 MHz processor is also available as an upgrade option.
Temperature Sensors
The primary temperature sensor is located on the processor board and the
secondary temperature sensor is located on the system board. These sensors
turn the fan on when the system approaches maximum reliable operating
temperatures.
If the temperature continues to rise, a system management interrupt (SMI)
is generated that creates a pop-up window (depicting a thermometer) to warn
the user of the temperature overload and the unit goes into Standby within
several seconds. If the temperature continues to rise, the computer turns
itself off.
NOTE: The temperature sensors are integrated into the processor board and
the system board. To replace a temperature sensor, the appropriate
board must be replaced.
Power Interface Board (PIB)
The power interface board (PIB) (Figure 1-8) is mounted to the system board
by a 16-pin connector. The PIB provides the following features:
o Numeric keypad connector
o Speaker and speaker amplifier
o Power switch
o Standby button
o Display switch
o The following LEDs:
- Power/standby
- Scroll lock
- Caps lock
- Num lock
Refer to Section 1.4 for more information on the controls and LEDs listed
above.
Memory Expansion Board
The 4 or 8 MB base RAM memory (depending on the model) may be increased by
adding an optional memory expansion board (Figure 1-9). The memory
expansion board plugs directly into the back side of the system board
(Section 4.6).
The system supports the following 3.3 volt memory expansion boards (which
operate at 70ns):
o 4 MB
o 8 MB
o 16 MB
NOTE: Some early memory expansion boards for the Concerto Family of
Personal Computers (option kit numbers 144790-001 and 144790-002)
operate at 80 ns and do not function properly when installed in the
Compaq LTE Elite Family of Personal Computers, which operate at
70 ns. Use only Compaq LTE Elite memory expansion boards
(Table 3-2).
Refer to the table in Section 5.3 for a list of total RAM memory based on
available system memory and memory obtained from the expansion board.
Internal AC Power Supply (AC-to-DC)
The computer is powered by a high-efficiency, board-mounted, internal
AC-to-DC power supply (Figure 1-10). The power supply provides the computer
with an 18.5 volt DC output for running all computer functions, including
charging the internal battery pack.
Fan
The internal fan (Figure 1-11) draws in fresh air through vent holes in the
PCMCIA compartment door, then exhausts it out the back of the computer.
The fan operates on 5 volts and is controlled by temperature sensors
located near the internal power supply and the processor board. The fan is
designed to turn on automatically when the system approaches maximum
reliable operating temperatures (refer to "Temperature Sensors" in this
section).
The fan is integrated into the input/output (I/O) bracket/fan assembly. To
replace the fan, the I/O bracket/fan assembly must be replaced.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
To properly ventilate the computer, allow at least a 3-inch (7.62 cm)
clearance at the back and sides of the unit.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Keyboard
The internal keyboard is connected to the system board by a flex cable. In
addition to the internal keyboard, there is a connector for an external
keyboard/mouse.
Battery Pack
The removable internal nickel metal hydride (NiMH) battery pack connects to
the computer through a set of battery contacts mounted on the system board.
Battery charging functions are controlled by the DC-to-DC converter on the
system board. The battery pack contains RAM memory that saves the last
recorded battery operating time and battery fuel gauge values.
Refer to Appendix B for information on increasing battery pack operating
time, ensuring battery gauge accuracy, conditioning the battery pack, and
disposal of a used battery pack.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Do not crush, puncture, or incinerate the battery pack or short the battery
pack external contacts. Do not open a battery pack, as this damages the
pack, makes it unusable, and exposes potentially harmful battery
components. There are no field-serviceable parts located inside the battery
pack.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Auxiliary Battery
The internal auxiliary battery (Figure 1-12), mounted on the I/O bracket,
supplies voltage to the system real-time clock and maintains alarm, time,
date, and configuration information when the battery pack and external
power sources are removed. In addition, the auxiliary battery protects RAM
memory for a one-minute period during Standby to allow a battery pack to be
replaced.
The auxiliary battery has a nickel cadmium cell that supplies 7.2 volts for
50 mAmp hours. The auxiliary battery recharges when the computer is on
while connected to an external power source or the battery pack. It takes
approximately 10 hours to recharge a fully discharged auxiliary battery
using AC power and approximately 20 hours to recharge it using the battery
pack.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> WARNING <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
Do not crush, puncture, or incinerate the auxiliary battery or short the
auxiliary battery external contacts. Do not open an auxiliary battery, as
this damages the battery, makes it unusable, and exposes potentially
harmful battery components. There are no field-serviceable parts located
inside the battery.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
If the computer is unused for approximately 60 days without being connected
to an external power source, a fully charged auxiliary battery will drain
to a critically low level. This may result in loss of alarm, time, and date
information. If this happens, recharge the auxiliary battery or replace it
if it is defective (refer to Section 4.8). Run Computer Setup to restore
the alarm, time, and date information (refer to Section 1.8).
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>><<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
NOTE: CMOS password and configuration information is copied to an EEPROM so
that it is not lost if the auxiliary battery is unplugged or
discharged.
Diskette Drive
The standard 11 mm diskette drive is connected to the system board by a
cable. The drive reads and writes to 3.5-inch 1.44 MB (high density) and
720 kilobyte (double density) diskettes. With the proper software support,
the drive is also capable of reading and writing to 1.2 MB Japanese
standard diskettes.
Hard Drive
The 2.5-inch hard drive (Figure 1-13) is user-removable from the front of
the computer (Section 4.12). The hard drive release button allows the drive
to be removed without disassembling the computer. A connector on the hard
drive enclosure mates to a connector on the system board.
NOTE: The hard drive may have either a metal handle (Figure 1-13) or a
plastic pull tab that is attached directly to the hard drive
enclosure.
Hard drive security clips can be installed to prevent the hard drive from
being removed (refer to Section 4.12). When the security clips are
installed, a lock label should be attached to the front of the hard drive
to indicate that the drive is locked in place. The computer must be
partially disassembled to remove the security clips before the hard drive
can be removed.
NOTE: The Compaq Diagnostics utilities (which include Computer Setup)
reside in a hidden partition on the Compaq LTE Elite hard drive (not
in the ROM). There is no preinstalled software on a new spare hard
drive. When installing a new spare hard drive, the hidden partition
must be created, the diagnostics utilities must be installed, and the
C: partition must be formatted before restoring any data
(Section 4.12). On the option kit hard drives, the hidden partition
is already created and the diagnostics utilities are already
installed.
IMPORTANT: The hard drive must be handled with care. Refer to the cautions
listed in Section 4.12.
Display Assembly
The display assembly (Figure 1-14) is connected to the system unit by
clutches, a display cable and a ground cable. The display assembly includes
an integrated trackball board and an inverter board. The color and
black-and-white TFT display assemblies have an externally adjustable
brightness control slide [1]. The color STN display assembly has two
externally adjustable control slides: one for contrast [2] and one for
brightness [3]. The display assembly comes with one of the following
panels, depending on the model:
o 9.5-inch color STN
o 9.5-inch mono TFT
o 8.4-inch color TFT
o 9.5-inch color TFT
IMPORTANT: In order to optimize display quality and ensure regulatory
compliance, many of the parts in the 9.5-inch color TFT display
can be replaced only by replacing the entire display assembly (Section 4.9).
Refer to Section 5.4 for display specifications.
NOTE: A certain number of pixels in the display panel are allowed to be
nonfunctional due to limitations in LCD technology.
PCMCIA Slot
The PCMCIA connector is mounted to the system board. The connector is
accessible through the PCMCIA slot [1], (Figure 1-15), which is covered by
a PCMCIA compartment door. The slot accommodates one of the following card
combinations:
o Two PCMCIA Type I or Type II cards
o One PCMCIA Type III card
The PCMCIA slot supports both 5 volt and 3.3 volt PCMCIA cards in
accordance with PC Card Standard Release 2.1 or later and the Exchangeable
Card Architecture (ExCA) Specification 1.10.
NOTE: PCMCIA stands for Personal Computer Memory Card International
Association. PCMCIA standards continue to change. Many cards on the
market do not comply with the PCMCIA specifications and, therefore,
do not function properly in the computer. To assist users in
selecting compatible PCMCIA devices, Compaq provides a list of
third-party cards that have been tested in Compaq products. To ensure
compatibility, select a Compaq PCMCIA modem or other vendor cards on
the tested list. Call Compaq Reseller Support to have a copy of the
list faxed to you.
1.7 Docking Options
The Compaq LTE Elite docks with the following options (Figure 1-16):
o Compaq SmartStation expansion base
o Compaq LTE Lite Desktop Expansion Base (with an Upgrade Adapter)
o Compaq MiniStation/EN and MiniStation/TR convenience bases
Refer to Appendix D for more information on docking and undocking.
1.8 Running Computer Setup
The Computer Setup utility resides in a hidden partition on the hard drive.
Run Computer Setup for the following situations:
o To configure options
o To update alarm, time, date, or password information
NOTE: Alarm, time, and date information can be lost if the computer is
unused for approximately 60 days without charging the internal
battery pack or without AC power being connected (refer to "Auxiliary
Battery" in Section 1.6). If this information is lost, run Computer
Setup to restore it.
IMPORTANT: Use AC power during Computer Setup procedures. A low battery
condition could initiate Standby and interrupt the program.
To run Computer Setup, complete the following steps:
1. Turn on or restart the computer.
2. Press the F10 key as soon as the cursor moves to the upper-right corner
of the screen.
3. When prompted, select the desired language.
4. Select Computer Setup from the Configuration and Diagnostics menu.
5. Follow the instructions on the screen.
1.9 Reprogrammable Flash ROM
The flash ROM can be reprogrammed to update system firmware and provide the
most recent level of system functionality. In some cases, problems may be
solved by upgrading the ROM.
Erase and reprogram the nonvolatile read only memory (ROM) by using the
ROMPaq utility. The ROMPaq utility is available on the Portables ROMPaq
Upgrade Diskette, which includes on-screen instructions for implementing
the flash ROM upgrade (Table 3-16).
1.10 Power Management
The following power management features are available for conserving AC
power and extending battery operating time:
o Advanced Power Management (APM)
o Power management settings
o Standby
o Hibernation
Advanced Power Management (APM)
APM is installed on the computer and requires no action from the user to
reduce power consumption. APM turns off the processor between keystrokes
and when the system is idle. This function is transparent to the user. APM
also provides occasional screen messages about the battery while in the
Windows environment (for example, low power condition).
Power Management Settings
You can select power conservation settings through Computer Setup, Power
Management, or by pressing the Fn + F7 hotkeys to maximize power for
specific requirements. These settings control the power conservation rate
and the timeout values for various system components. A timeout is
specified period of system or component inactivity. After this period, the
system or component (for example, the hard drive) is shut down to conserve
power until it is accessed again.
If the power conservation rate and timeouts are not selected, the computer
uses the default settings listed in Table 1-3.
Table 1-3. Power Conservation Default Settings
===========================================================================
Battery Power AC Power
Feature Default Setting Default Setting
===========================================================================
Standby timeout 5 minutes 15 minutes
Hard drive timeout 2 minutes 15 minutes
Screen save timeout 3 minutes 15 minutes
Display brightness 75% of rated brightness 100% of rated brightness
Processor speed (MHZ) 100% of rated speed 100% of rated speed
===========================================================================
Standby
Standby is a power conservation mode for battery or AC power operation
during which most of the components (e.g, hard drive, processor, display)
shut down.
The computer initiates Standby under the following conditions:
o When the user presses the standby button [1] (Figure 1-17).
o After a timeout occurs.
o When the battery pack voltage reaches a low level (if this option is
preselected).
When the user exits Standby (by pressing the standby button again),
information returns to the screen at the point where Standby was initiated.
Under battery power, the computer can maintain Standby for up to 120 hours.
NOTE: The computer cannot initiate Standby under the conditions listed
above when docked in an expansion base or a convenience base. In
addition, the computer cannot initiate Standby if there is activity
from the hard drive, diskette drive, mouse, keyboard, PCMCIA slot,
parallel connector, or serial connector.
Hibernation
Hibernation is a power conservation mode that performs the following
functions:
o Locks the keyboard and clears the screen.
o Saves all current information in memory and the place in the application
to the hard drive.
o Turns the computer off.
Hibernation is preenabled on the computer and the Hibernation file is
preinstalled on the hard drive. The Hibernation file is slightly larger
than the total RAM memory of the computer (system memory and memory
expansion board).
Hibernation is initiated by one of the following means:
o Automatically according to the preselected system timeout.
o Automatically when the battery reaches a low battery level if
preselected.
o Manually by simultaneously pressing the Fn key and standby button.
When the computer is turned on again, the system exits Hibernation and the
user is returned to the previous place in the application from the hard
drive.
NOTE: Hibernation cannot be initiated when the computer is in an expansion
base or a convenience base.
Battery Operating Time
Battery operating time is affected by variables such as the following:
o Power conservation settings
o Hardware configuration
o Software applications
o Installed options
o Display brightness
o Hard drive usage
o Changes in operating temperature
o Type and number of installed PCMCIA cards
Refer to Appendix B for information on increasing battery pack operating
time, ensuring battery gauge accuracy, conditioning the battery pack, and
disposal of a used battery pack.
1.11 Security
The computer has the following security features:
o Power-on password and setup password.
o The ability to disable certain components, such as the keyboard, diskette
drive, display, PCMCIA slot, parallel connector, and serial connector, to
prevent unauthorized access.
o Provision for an optional cable lock (Figure 1-18) to lock the computer
to an immovable object.
NOTE: For procedures to clear the power-on password, refer to "Clearing the
Power-On Password" in Section 2.1.
NOTE: The cable lock, Kensington MicroSaver Security System Model 64068
(Figure 1-19), is available from Kensington Microwave Limited or
major computer resellers worldwide at 1-(415)-572-2700. The cable
lock is not available through Compaq.
Chapter 2 - Compaq LTE Elite Troubleshooting
Introduction
This chapter covers troubleshooting information for the computer. The basic
steps in troubleshooting include:
1. Following the preliminary steps listed in Section 2.1.
2. Running the Power-On Self-Test (POST) as described in Section 2.2.
3. Running Computer Checkup (TEST) as described in Section 2.3.
4. Following the recommended actions described in the diagnostic tables in
Section 2.4 if you are unable to run POST or Computer Checkup or if the
problem persists after they are run.
When following the recommended actions in Section 2.2, 2.3, and 2.4, carry
them out in the order given. Rerun POST and Computer Checkup after each
recommended action until the problem is solved and no error message occurs.
(Once the problem is solved, do not complete the remaining recommended
actions.)
NOTE: If the problem was intermittent, check the unit several times to
verify that the problem is solved.
Refer to Chapter 4 for any removal and replacement procedures that are
recommended.
2.1 Preliminary Steps
IMPORANT: Use AC power when running POST, Computer Setup, and Computer
Checkup. A low battery condition could initiate Standby and
interrupt the program.
Before running POST and Computer Checkup, complete the following
preliminary steps:
1. If a power-on password has been established, type the password and press
the Enter key.
NOTE: The key symbol (o--m) appears on the screen when the computer is
turned on to indicate that a power-on password is established. If
the password is unknown, it must be cleared (refer to "Clearing
the Power-On Password").
2. Run Computer Setup (Section 1.8).
3. Position the brightness and contrast control slides approximately in the
center of their range and leave the display open.
4. Turn off the computer and external devices.
5. Disconnect any external devices that you do not want to test. (Do not
disconnect the printer if you want to test it or use it to log error
messages.)
NOTE: If a problem only occurs when an external device is connected to
the computer, the problem may be with the external device or its
cable. Verify this by running POST with and without the external
device connected.
6. Install loopback plugs in the serial and parallel connectors if you
would like to test these ports (Table 3-13).
7. Ensure that the removable hard drive is installed in the computer.
8. Ensure that the battery pack is inserted in the computer and the
computer is connected to an external AC power source.
When the preliminary steps are complete, you are ready to run POST
(Section 2.2) and Computer Checkup (Section 2.3).
Clearing the Power-on Password
Clearing the power-on password clears CMOS, the EEPROM that contains
configuration information for all external devices, the setup password, and
all other security features including:
o QuickLock
o QuickBlank
o Diskette drive disable
o Diskette boot ability disable
o Serial port disable
o Parallel port disable
o PCMCIA slot disable
NOTE: Disconnecting the auxiliary battery does not clear the power-on
password.
If the password is unknown, clear it by completing the following steps:
1. Turn off the computer.
2. Disconnect the power cord.
3. Remove the battery pack (Section 4.5).
4. Remove the keyboard cover (Section 4.7).
5. Remove the keyboard, but don't disconnect the cable (Section 4.10).
Place the keyboard toward the front of the system unit to access the
jumper located near the lower-right corner of the processor board.
NOTE: The pins used by the jumper are labeled on the system board as
"1," "2," and "3." (Pin "1" is toward the rear of the computer.)
The jumper can be placed simultaneously on pins 1 and 2 (the
"1-2" or "normal" position [1]) or on pins 2 and 3 (the "2-3" or
password-clearing position [2]). Refer to Figure 2-1.
6. Move the jumper from the normal "1-2" position [1] to the "2-3"
position [2] (Figure 2-1).
7. Insert the battery pack.
IMPORTANT: Ensure that the battery pack is charged since a low battery
condition could initiate Standby and interrupt the
procedure.
8. Turn on the computer.
The ROM clears the power-on password during POST.
9. After POST finishes, turn off the computer.
10. Remove the battery pack.
11. Move the jumper back to the normal "1-2" position.
12. Insert the battery pack.
13. Turn on the computer to verify that the power-on password has been
cleared. If it has not been cleared, remove the battery pack and then
repeat steps 6 through 13. If the password is still not cleared,
replace the system board (Section 4.17).
14. Replace the keyboard.
15. Replace the keyboard cover.
16. Reconnect the power cord to the external outlet.
17. Run Computer Setup (Section 1.8) to reconfigure the system and reset
the power-on and setup passwords.
2.2 Power-On Self-Test (POST)
The Power-On Self-Test (POST) is a series of diagnostic tests that run
automatically when the system is turned on. POST detects which types of
mass storage devices are installed in the computer and checks that the
following assemblies are functioning properly:
o Diskette drive
o Display
o External keyboard
o Hard drive
o Internal keyboard controller
o Memory expansion board
o Processor board
o Speaker on the power interface board (PIB)
o System board
o System memory
o Trackball assembly (POST identifies the trackball but does not actually
test it.)
o Video controller circuitry
Running POST
To run POST, complete the following steps:
1. Turn off the computer.
2. Turn on the computer.
If POST does not detect any errors, the computer beeps once or twice to
indicate that POST has run successfully and starts (boots) from the hard
drive (or from a bootable diskette if one is installed in the diskette
drive).
If POST detects errors, the errors are indicated by screen and/or audible
messages. Refer to "Power-On Self-Test (POST) Error Messages" in this
section for a list of POST error messages, probable causes, and recommended
actions.
Run Computer Checkup after POST runs successfully (Section 2.3).
NOTE: If the system is not functioning well enough to run POST, or if the
display is not functioning well enough to show POST error messages,
refer to the troubleshooting tables in Section 2.4.
Power-On Self-Test (POST) Error Messages
Table 2-1 lists visual error messages for POST, audible (beep) error
messages, probable causes, and recommended actions.
Table 2-1. Power-On Self-Test Messages
===========================================================================
Message Beeps Probable Cause Recommended Action
===========================================================================
101 - ROM Error 1 Long, System ROM checksum 1. Inspect the ROM
1 Short invalid. placement.
2. Replace the ROM.
3. Flash the ROM.
4. Replace the system
board.
---------------------------------------------------------------------------
101 - I/0 ROM None Option ROM checksum 1. Inspect the ROM
Error invalid. placement.
2. Verify the correct
ROM.
3. Replace the ROM.
---------------------------------------------------------------------------
102 - System None Defective DMA, 1. Replace the system
Board Failure timers, etc. board.
2. Replace the processor
board.
---------------------------------------------------------------------------
162 - System 2 Short No diskette drive 1. Run Computer Setup.
Options or mismatch in 2. Check diskette cable.
Error drive type. 3. Check diskette drive.
---------------------------------------------------------------------------
162 - System 2 Short Configuration Run Computer Setup.
Options Not Set incorrect.
---------------------------------------------------------------------------
163 - Time & 2 Short Invalid time or Run Computer Setup.
Date Not Set date in
configuration
memory.
---------------------------------------------------------------------------
164 - Memory 2 Short Configuration The following steps
Increase memory incorrect. apply to both 164 error
Detected codes:
1. Autosetup will
correct.
2. Verify that memory
board is installed
correctly.
3. Replace memory
board.
4. Replace system board.
------------------------------------------------
164 - Memory 2 Short Configuration
Decrease memory incorrect.
Detected
---------------------------------------------------------------------------
168 - CMOS None Auxiliary battery 1. Recharge auxiliary
Checksum charge is low. battery. (Refer to
Invalid "Auxiliary Battery"
in Section 1.6). Run
Computer Setup if
configuration
settings are other
than default. **
---------------------------------------------------------------------------
** Autosetup configures to the default settings if you do not run Computer
Setup.
===========================================================================
Message Beeps Probable Cause Recommended Action
===========================================================================
201 - Memory None RAM failure. 1. Make sure the memory
Error module is installed
correctly.
2. Clean the contacts of
the memory module and
system board.
3. Make sure PCMCIA
memory card is
installed correctly
by running PCMCIA
card service
software and
Computer Setup.
4. If using ISA
expansion memory
module, make sure
module is installed
correctly.
5. Replace the memory
module(s) (if
applicable).
6. Replace PCMCIA memory
card.
7. Replace ISA memory
board.
8. Replace system board.
---------------------------------------------------------------------------
203 - Memory None RAM failure. Refer to recommended
Address Error actions for Error Code
201.
---------------------------------------------------------------------------
205 - Memory None Cache memory error. 1. Run Computer Checkup.
Error 2. Replace the processor
board.
---------------------------------------------------------------------------
207 - Invalid None Memory module Verify placement of
Memory installed memory.
Configuration incorrectly.
Module
---------------------------------------------------------------------------
209 - NCA RAM None RAM Failure. Run Computer Checkup.
Error
---------------------------------------------------------------------------
211 - Memory None RAM Failure. Run Computer Checkup.
Failure
---------------------------------------------------------------------------
301 - Keyboard None Keyboard failure. The following steps
Error apply to both 301 error
codes:
301 - Keyboard None Keyboard failure.
Error or Text 1. Reseat external
Fixture keyboard cable and
Installed free any stuck keys.
2. Replace keyboard.
3. Replace system board.
===========================================================================
Message Beeps Probable Cause Recommended Action
===========================================================================
303 - Keyboard None System board Replace the system
Controller Error keyboard board.
controller
failure.
---------------------------------------------------------------------------
304 - Keyboard None Defective keyboard. Check external keyboard.
or System Unit
Error ----------------------------------------------
Defective system Replace system board.
board.
---------------------------------------------------------------------------
40X - Parallel 2 Short Both external Run Computer Setup.
Port X Address and internal ports
Assignment are assigned to
Conflict parallel port X.
---------------------------------------------------------------------------
401 - Printer None Defective printer Replace the system
Error controller. board, if applicable.
---------------------------------------------------------------------------
501 - Display 1 Long, Video display 1. Replace the video
Adapter Failure 2 Short controller. board if external one
used.
2. Replace the system
board.
---------------------------------------------------------------------------
601 - Diskette None Diskette controller 1. Make sure diskette
Controller Error circuitry. drive cable is
seated.
2. Replace the diskette
drive cable.
3. Replace the diskette
drive.
4. Replace the system
board.
---------------------------------------------------------------------------
602 - Diskette None Diskette in drive A 1. Replace the diskette.
Boot not bootable. 2. Replace the diskette
drive.
3. Replace the system
board.
---------------------------------------------------------------------------
605 - Diskette 2 Short Mismatch in drive Run Computer Setup.
Drive Error type.
---------------------------------------------------------------------------
610 - External None Switch 3 on the Verify switch 3 setting
storage device vertical circuit and change if necessary.
failure. board is set for
an external drive
but no tape or
diskette drive is
installed in the
expansion base.
----------------------------------------------
External storage 1. Turn on external
device not powered storage device and
up. reboot computer.
2. Check and/or replace
power and signal
cables for external
storage device.
===========================================================================
Message Beeps Probable Cause Recommended Action
===========================================================================
611 - Primary 2 Short Configuration Run Computer Setup.
Floppy Port error.
Address
Assignment
Conflict
---------------------------------------------------------------------------
612 - Secondary 2 Short Configuration Run Computer Setup.
Floppy Port error.
Address
Assignment
Conflict
---------------------------------------------------------------------------
702 - None Coprocessor error. Replace the processor
Coprocessor board.
Detection Error
---------------------------------------------------------------------------
702A - 2 Short Coprocessor error. Replace the processor
Coprocessor board.
Detection Error
---------------------------------------------------------------------------
703 - CMOS 2 Short Coprocessor or 1. Run the Configuration
Reports A configuration utility.
Coprocessor That error. 2. Replace the processor
Has Not Been board.
Detected by
POST
---------------------------------------------------------------------------
1125 - Internal 2 Short Defective internal 1. Run Computer Setup
Serial Port serial port. and check it.
Failure 2. Replace the system
board.
---------------------------------------------------------------------------
1150 - COM Port Two ports are Run Computer Setup.
Configuration configured in the
Error same address.
---------------------------------------------------------------------------
1151 - COM Port 2 Short Both external and Run Computer Setup.
1 Address internal serial
Assignment ports are assigned
Conflict to COM1.
---------------------------------------------------------------------------
1152 - COM Port 2 Short Both external and Run Computer Setup.
2 Address internal serial
Assignment ports are assigned
Conflict to COM2.
---------------------------------------------------------------------------
1771 - Primary 2 Short Internal and 1. Run Computer Setup.
Disk Port external hard drive 2. Check expansion base
Address controllers are switch settings.
Assignment both assigned to 3. Check unit out of
Conflict the primary expansion base.
address.
===========================================================================
Message Beeps Probable Cause Recommended Action
===========================================================================
1772 - Secondary 2 Short Internal Run Computer Setup.
Disk Port and external hard
Address drive controllers
Assignment are both assigned
Conflict to the secondary
address.
---------------------------------------------------------------------------
1780 - Disk 0 None Hard drive/format 1. Run Computer Checkup.
Failure error. 2. Replace the drive.
---------------------------------------------------------------------------
1781 - Disk 1 None Hard drive/format 1. Run Computer Checkup.
Failure error. 2. Replace the drive.
---------------------------------------------------------------------------
1782 - Disk None Hard drive 1. Run Computer Checkup.
Controller circuitry error. 2. Replace the drive.
---------------------------------------------------------------------------
1790 - Disk 0 None Hard drive error or 1. Run Computer Setup
Failure wrong drive type. and Computer Checkup.
2. Replace the drive.
---------------------------------------------------------------------------
1791 - Disk 1 None Hard drive error or 1. Run Computer Setup
Failure wrong drive type. and Computer Checkup.
2. Replace the drive.
---------------------------------------------------------------------------
1792 - Secondary None Incorrect C/D Verify position of
Disk Controller switch settings. C/D and configuration
Failure switches in expansion
base and run Computer
Setup.
----------------------------------------------
Defective hard 1. Reseat hard drive
drive or hard drive cable and replace
cable. if required.
2. Install a different drive.
----------------------------------------------
Defective system If the drive in the
board in expansion expansion base is
base. designated as secondary,
replace the system
board in the expansion
base.
----------------------------------------------
Defective system If the drive in the
board in computer. computer is designated
as secondary, replace
the system board in the
computer.
---------------------------------------------------------------------------
1793 - Secondary None Refer to probable Refer to recommended
Disk Controller causes for Error actions for Error Code
or Disk Failure Code 1792. 1792.
---------------------------------------------------------------------------
Audible 1 Short Power-on None.
successful.
---------------------------------------------------------------------------
Audible 2 Short Power-on None.
successful.
---------------------------------------------------------------------------
(RESUME = F1 None As indicated to Press the F1 key.
KEY) continue.
===========================================================================
2.3 Computer Checkup (Test)
After POST runs successfully, run the latest version of Computer Checkup
(TEST). Computer Checkup determines if the computer assemblies and options
are recognized by the system and functioning properly. Run Computer Checkup
after installing or connecting a new assembly or option.
Computer Checkup is installed on the hard drive. If the hard drive is not
functioning, you can run it from the Compaq Diagnostics diskette by
inserting the diskette in Drive A before turning on the computer.
NOTE: It is recommended that you make a diskette copy of Compaq Diagnostics
and keep it available for future need. If necessary, a copy can be
obtained from the Compaq Customer Support Center.
Running Computer Checkup
To run Computer Checkup from the hard drive, complete the following steps:
1. Turn off the computer.
2. Turn on the computer.
3. Press F10 immediately after the computer beeps and the cursor moves to
the upper-right corner of the screen.
The Configuration and Diagnostics menu is displayed.
4. Select Computer Checkup (TEST) from the Configuration and Diagnostics
menu.
The Computer Checkup options menu is displayed.
5. Select View Device List.
A list of the installed hardware devices is displayed.
NOTE: Computer Checkup may not detect non-Compaq devices.
6. Verify that Computer Checkup correctly detected the installed devices.
If the list is correct, select OK. The Computer Checkup option menu is
displayed again.
If the list is incorrect, verify that the new devices are installed
properly.
7. Select one of the following from the Computer Checkup options menu:
o Quick Check Diagnostics - This option runs a quick, general test on
each device with a minimal number of prompts. If errors occur, they
are displayed when the testing is complete.
o Automatic Diagnostics - This option runs an unattended, maximum test
of each device with minimal prompts. You can choose how many times to
run the tests, to stop on errors, or to print or file a log of
errors.
o Prompted Diagnostics - This option allows maximum control over the
device testing process. You can choose attended or unattended
testing, decide to stop on errors, or choose to print or file a log
of errors.
8. Follow the instructions on the screen as the diagnostic tests are run
on the devices.
When the testing is complete, the Comp◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo