Compaq Presario 1625, Presario 1636, Presario 1635, Presario 1624 User Manual

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Notice

Preface Product

Description Troubleshooting Illustrated

Parts Catalog Removal &

Repair Procedures

Specifications Connector Pin

Assignments Battery Pack

Welcome to the Presario 1600 Series Portable Computer Maintenance & Service Guide. This online guide is designed to serve the needs of those whose job it is to repair Compaq products. Many of the components of the hardcopy MSG are contained in this online guide. The

Notice, contains the copyright and trademark

information. The

Preface shows symbol conventions and

Technician Notes.

This MSG will be periodically maintained and updated online as needed.

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

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.

Compaq, Presario Registered U. S. Patent and Trademark Office.

Microsoft, MS-DOS, and Windows are registered trademarks of Microsoft Corporation. Windows 95 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 Presario 1600 Series Portable Computers

First Edition (October 1997) Spare Part Number 298499-001 Documentation Part Number 330976-001

Compaq Computer Corporation

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Preface

This Maintenance and Service Guide is a troubleshooting guide that can be used for reference when servicing the Compaq Presario 1625/1635 Series Portable Computers.

Compaq Computer Corporation reserves the right to make changes to the Compaq Presario Series Portable Computers without notice.

Symbols

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 data.

Text set off in this manner presents clarifying information or

IMPORTANT:

specific instructions.

Text set off in this manner presents commentary, sidelights, or

NOTE:

interesting points of information.

Technician Notes

WARNING: Only authorized technicians trained by Compaq should 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, the user should not 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 indications of component replacement or printed circuit board modifications may void any warranty.

Serial Number

When requesting information or ordering spare parts, the computer serial number should be provided to Compaq. The serial number is located on the bottom of the computer.

Locating Additional Information

The following documentation is available to support this product:

● Compaq Presario 1624/1625/1635/1636 Series Portable Computer

documentation set

● Introducing Windows 95 Guide

● Service Training Guides

● Compaq Service Advisories and Bulletins

● Compaq QuickFind

● Compaq Service Quick Reference Guide

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Product Description

Models and Features

Rear Connectors

Port Replicator

Power Management

Compaq Presario 1600 Series Portable Computers are a new generation of multimedia portable computers with an innovative integrated design, outstanding audio and video, advanced core features, and attractive styling. This fullfunction, Pentium-based series of portable computers allows full desktop functionality.

Compaq Presario 1600 Series Portable Computers

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Troubleshooting

WARNING: To avoid a potential shock hazard during troubleshooting procedures,

disconnect all power sources before removing the keyboard cover or the display bezel.

This chapter covers troubleshooting information for the Compaq Presario Series Portable Computers. The basic steps in troubleshooting include:

1. Following the

Preliminary Steps.

2. Running the Power-On Self-Test (POST).

3. If you are unable to run POST you may Troubleshoot Without Diagnostics.

Search for Error Code by number.

Perform the recommended actions in the order listed. Rerun POST 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 is intermittent, check the computer several times to verify that the problem is solved.

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Illustrated Parts Catalog

System Unit Boards Display Mass Storage Devices Cables Miscellaneous Hardware and Screws

This chapter provides an illustrated parts breakdown and identifies the spare parts ordering number associated with each item(s) for Compaq Presario 1600 Series Portable Computers.

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Removal & Replacement Procedure

This chapter presents the removal and replacement procedures for the computer.

ESD

Service Considerations

Cable Positions

Preparing the Computer for Disassembly

Serial Number Location

Report the computer serial number to Compaq when requesting information or ordering spare parts. The serial number is displayed on the bottom of the computer.

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Specifications

This section covers the following specifications of Compaq Presario 1600 Series Portable Computers:

● Physical and Environmental/Specifications

● System Interrupts

● System DMA

● System I/O Address

● System Memory Map

● Memory Expansion

● Diskette Drive

● Hard Drive

● CD Drive

● Battery Pack

● Dip Switch Settings

Physical and Environmental/Specifications

Dimensions

Height Depth Width

Weight

Model 1625 Model 1635 Model 1640

Stand-Alone (Battery Pack) Power Requirements

1.96 in

12.30 in

10.08 in

7.326Ib

NiMH

U.S. Metric

4.95 cm

31.00 cm

25.40 cm

3.33 kg

Li-ion

Nominal Operating Maximum Average Peak Operating

AC Power Requirements

Operating Voltage Operating Current Operating Frequency

Maximum Transient

Temperature

Operating 50° to 95 °F 10° to 35 °C Non-operating -4° to 140 °F -20° to 60 °C

Relative Humidity (noncondensing)

Operating 10 to 90% 35°C to 90% Non-operating (tw = 38.7°C

max)

W @ 9.6 V W @ 9.6 V W @ 9.6 V

100-240 V

0.8/0.4 A RMS 47-63 Hz Meets IEC 801-4 and IEC801-5 1kV for 50 ns

5 to 95% 60°C to 95%

W @ 14.4 V W @ 14.4 V W @ 14.4 V

Altitude

Operating 0 to 10,000 ft 0 to 3.15 km Non-operating 0 to 30,000 ft 0 to 9.14 km

Shock

Operating 10 G, 11 ms, half sine Non operating 240 G, 2 ms, half sine

Vibration

Operating 0.5 G Non-operating 1.5 G

NOTE:

Applicable product safety standards specify thermal limits for plastic surfaces. Compaq Presario 1600 Series Portable Computers operate well within this range of temperatures.

System Interrupts

Hardware IRQ System Function

IRQ0 Timer Interrupt IRQ1 Keyboard IRQ2 Interrupt Controller Cascade IRQ3 0X2F8 Default Resources for Modem IRQ4 Communications Port (COM 1) IRQ5 ES1869 Plug and Play AudioDrive IRQ6 Diskette Drive IRQ7 Parallel Port (LPT 1) (default)

IRQ8 System CMOS/Real-Time Clock IRQ10 IRQ Holder for PCI Steering IRQ10 PCI-1131 CardBus Controller IRQ11 IRQ Holder for PCI Steering IRQ11 MagicGraph128XD

DMA 0 ES1869 Plug and Play AudioDrive DMA 1 ES1869 Plug and Play AudioDrive DMA 2 Diskette Drive

IRQ11 PCI-1131 CardBus Controller IRQ12 PS/2 TouchPad IRQ13 Coprocessor IRQ14 Primary IDE Controller (dual FIFO) IRQ14 Opti Dual PCI IDE Controller IRQ15 Opti Dual PCI IDE Controller IRQ15 Secondary IDE Controller (dual FIFO)

System DMA

Hardware DMA System Function

DMA 4 Direct Memory Access Controller

System I/O Address

I/O Address (Hex) System Function (Shipping Configuration)

0000h-000Fh DMA Controller # 1 0020h-0021h Interrupt Controller # 1 0022h-0024h Motherboard resources 0040h-0043h System timer 0060h-0060h Keyboard Controller 0061h-0061h System speaker 0064h-0064h Standard 101/102-Key or Microsoft Natural

Keyboard 0070h-0071h System CMOS/real time clock 0080h-0080h Motherboard resources 0081h-008Fh DMA Controller 0092h-0092h Motherboard resources

00A0h-00A1h Programmable interrupt controller 00C0h-00DFh DMA Controller 00ECh-00EFh Motherboard resources

00F0h-00FFh Numeric data processor

0170h-0177h Secondary IDE controller (dual FIFO) 0170h-0177h Opti Dual PCI IDE Controller

01F0h-01F7h Opti Dual PCI IDE Controller 01F0h-01F7h Primary IDE controller (dual FIFO)

0201h-0201h Gameport Joystick

0220h-022Fh ES1869 Plug and Play AudioDrive

0330h-0331h ES1869 Plug and Play AudioDrive 0370h-0371h Motherboard resources 0376h-0376h Secondary IDE controller (dual FIFO) 0376h-0376h Opti Dual PCI IDE Controller

0378h-037Fh Printer Port (LPT1)

0388h-038Bh ES1869 Plug and Play AudioDrive 03B0h-03BBh MagicGraph128XD 03C0h-03DFh MagicGraph128XD

03F0h-03F5h Diskette Drive Controller 03F6h-03F6h Primary IDE controller (dual FIFO) 03F6h-03F6h Opti Dual PCI IDE Controller 03F7h-03F7h Diskette Drive Controller 03F8h-03FFh Communications Port (COM1)

040Bh-040Bh Motherboard resources

0480h-048Fh Motherboard resources

04D6h-04D6h Motherboard resources

0800h-0807h ES1869 Control Interface

00000000h-0009FFFFh System board extension for PnP BIOS 000A0000h-000AFFFFh MagicGraph128XD 000B0000h-000BFFFFh MagicGraph128XD 000C0000h-000CBFFFh MagicGraph128XD

0CF8h-0CFFh PCI bus 1000h-107Fh PCI-1131 CardBus Controller FCF0h-FCF7h Primary IDE controller (dual FIFO) FCF0h-FCF7h Opti Dual PCI IDE Controller FCF8h-FCFFh Secondary IDE controller (dual FIFO) FCF8h-FCFFh Opti Dual PCI IDE Controller

System Memory Map

Memory Address System Function

000CC000h-000CCFFFh PCI-1131 CardBus Controller 000CD000h-000CDFFFh PCI-1131 CardBus Controller 000E0000h-000FFFFFh System board extension for PnP BIOS 00100000h-017FFFFFh System board extension for PnP BIOS 05000000h-05040FFFh PCI-1131 CardBus Controller FD000000h-FDFFFFFFh MagicGraph128XD FEA00000h-FEBFFFFFh MagicGraph128XD FED00000h-FEDFFFFFh MagicGraph128XD FFFC0000h-FFFFFFFFh Motherboard resources

System Memory

Memory Expansion

Expansion Board

Memory

Total Memory

8-MB 16-MB 24-MB 8-MB 32-MB 40-MB

8-MB 64-MB 72-MB 16-MB 16-MB 32-MB 16-MB 32-MB 48-MB 16-MB 64-MB 80-MB 32-MB 16-MB 48-MB 32-MB 32-MB 64-MB 32-MB 64-MB 96-MB 64-MB 16-MB 80-MB 64-MB 32-MB 96-MB 64-MB 64-MB 128-MB*

*Run the PHDISK utility to increase the size of the hibernation file for the larger memory size.

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Connector Pin Assignments

This section provides connector pin assignment tables for Compaq Presario 1600 Series Portable Computers and the Compaq Port Replicator for selected models. For more information on connectors, refer to Rear Connectors for

connectors located on the computer and on the port replicator.

The signals in all tables of this appendix are considered active high

NOTE:

unless otherwise indicated by an asterisk (*).

■ Parallel Connector

■ Serial Connector

■ Keyboard/Mouse

■ External VGA Monitor

■ Phone Line to Wall Jack

■ Port Replicator

Parallel Connector

Port Replicator for connectors located

Pin Signal Pin Signal

1 Strobe* 10 Acknowledge* 2 Data Bit 0 11 Busy 3 Data Bit 1 12 Paper Out 4 Data Bit 2 13 Select 5 Data Bit 3 14 Auto Linefeed* 6 Data Bit 4 15 Error* 7 Data Bit 5 16 Initialize Printer* 8 Data Bit 6 17 Select In* 9 Data Bit 7 18-25 Signal Ground

* = Active low

Serial Connector

Connector Pin Signal

Carrier Detect

Receive Data

Transmit Data

Data Terminal Ready

Signal Ground

Data Set Ready

Ready to Send

Clear to Send

Ring Indicator

Keyboard/Mouse

Connector Pin Signal

Data

Not defined

Ground

+5 VDC

Clock

Not defined

External VGA Monitor

Connector Pin Signal

Red Analog

Green Analog

Blue Analog

Not connected

Ground

Ground Analog

Phone Line to Wall Jack

Not connected

Ground

Monitor Detect

DDC2B Data

Horizontal Sync

Vertical Sync

DDC2B Clock

Connector Pin Signal

Port Replicator

Unused

Tip

Ring

Unused

Pin Signal Pin Signal Pin Signal Pin Signal

1 N.C. 21 Printer Data 0 41 N.C. 61 CTS 2 N.C. 22 Printer Data 1 42 N.C. 62 DCD 3 Kb Clk 1 23 Printer Data 2 43 Switch A 63 DSR 4 Joystick Data A 24 Printer Data 3 44 Switch B 64 TXD 5 Kb Data 1 25 Printer Data 4 45 Switch C 65 RTS 6 Joystick Data B 26 Printer Data 5 46 Switch D 66 N.C. 7 Kb Clk 2 27 Printer Data 6 47 N.C. 67 Detect 8 Joystick Data C 28 Printer Data 7 48 MIDI In 68 N.C. 9 Kb Data 2 29 Reserved 49 MIDI Out 69 V. Sync 10 Joystick Data D 30 Reserved 50 +5V 70 Ground 11 Lp Select In 31 Reserved 51 +5V 71 H. Sync 12 Lp Paper End 32 Reserved 52 N.C. 72 Ground 13 Lp Initialize 33 Adapter In 53 N.C. 73 Blue 14 Lp Busy 34 Adapter In 54 N.C. 74 Ground 15 Lp Error 35 Adapter In 55 N.C. 75 Green 16 Lp Ack 36 Adapter In 56 Dock ID - 76 Ground 17 Lp Auto Feed 37 Adapter In 57 RXD 77 Red 18 Lp Strobe 38 Adapter In 58 Lp Select 78 Ground 19 DDC2BC 39 N.C. 59 RI 79 N.C. 20 DDC2BD 40 N.C. 60 DTR 80 N.C.

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Battery Pack

This section covers the following information concerning battery pack operating time:

■ Increasing Battery Pack Operating Time

■ Minimizing the Energy Required

■ Maximizing the Energy Stored

■ Conditioning a Battery Pack

■ Battery Charge Time By Model

■ Disposal of a Used Battery Pack

Increasing Battery Pack Operating Time

Battery pack operating time differs depending on several variables. To avoid unnecessary replacement, consider the following variables when determining how long a charged battery pack should last:

■ Power management settings

■ Hardware configuration

■ Software applications

■ Installed options

■ Display brightness

■ Hard drive usage

■ Changes in operating temperature

■ Type and number of installed PC Cards

NOTE:

The power consumption requirements for PC Cards vary widely. Some cards drain the battery pack very rapidly.

Battery pack operating time can be increased by as much as 50 percent by controlling the energy required by the computer and the energy stored in the battery pack.

Minimizing the Energy Required

To minimize the energy required by the computer, follow these steps:

■ Set the power conservation levels in the Power Management utility to Maximum.

■ Customize the timeout value to work more efficiently with the applications. The amount of

battery life depends on the values selected.

Maximizing the Energy Stored

To maximize the energy stored in the battery pack, follow these guidelines:

■ Condition the battery pack at least every 30 days to improve overall battery performance.

■ Keep a battery pack in the computer when using it with AC power to supply the battery

pack with a constant trickle charge.

■ Store the battery pack in a cool, dry place when not in use.

Conditioning a Battery Pack

CAUTION: To avoid a loss of data, ensure that all data is saved before discharging a battery pack.

To condition a battery pack, complete the following steps:

1. Plug in the AC adapter and allow the battery to charge until the fast charge arrow on the display disappears. Your battery gauge may read 100 percent for a period of time before the arrow disappears. Do not unplug the AC adapter until the arrow disappears.

Select Disabled in the Power menu of the BIOS Setup. The system will hibernate after one hour of being in suspend. By selecting Disabled, the system will not timeout and enter suspend.

2. Unplug the AC adapter and allow the battery to drain until the computer reaches hibernation and turns itself off. Do not plug in the AC adapter during this process or you will need to restart with Step No. 1. You may use the computer while the battery is draining.

3. Your battery is re-conditioned.

4. Plug in the AC adapter and begin using the computer.

This table shows battery pack charge times by model.

Battery Charge Time By Model

Computer On Line Off Line

Model 1/NiMH Battery Pack 4.0 hours premature

termination

2:00 hr

Model 2/Li ion Battery Pack 4.5 hours premature

termination

2:50 hr

Disposal of a Used Battery Pack

In the interest of safeguarding our environment. Compaq Computer Corporation recommends that nickel metal hydride (NiMH) and lithium ion (Li ion) battery packs be recycled. Handle battery packs in accordance with country, state, province, or local regulations.

CAUTION: Never attempt to open or service a battery pack. Opening a battery pack not only damages the pack and makes it unusable, but also exposes potentially harmful battery components.

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Models & Features

Models and Features

Front Of Unit

Left Side Components

Right Side Components

Bottom Of Unit

Models

This table lists the relevant features of Compaq Presario Series Portable Computers.

Display

Processor

AMD K6

Hard Drives

Speaker

Assembly

Modem

Model 1625 Model 1635 Model 1640

12.1"HPA 12.1" TFT 12.1" TFT

266 MMX 233 MMX 266 MMX

3.2 GB 3.2 GB 4 GB

JBL Pro

K-56K D/F M++ 56K D/F K-56 K D/F

JBL Pro JBL Pro

Features

All models of the computer have the following features:

● 1.44-MB, 3.5-inch diskette drive

● Built-in 24× CD drive

● Ported stereo speakers

● TouchPad

● Easy Access CD Control Buttons

● 91-key (Three Windows 95 keys, 12 function keys) keyboard

● External AC adapter

● PC Card slots capable of handling one of the following card

combinations: Two Type I or Type II PC cards One Type III PC card

● Battery power management features include the following:

- Advanced Power Management (APM)

- Suspend mode

- Screen save

- Hibernation

● Password security

● Preinstalled software: Windows 95 OSR 2.5 or Windows 98

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Front of Unit

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Models and Features

Front Of Unit

Left Side Components

Right Side Components

Bottom Of Unit

Front of Unit

1. Display 9. CD Previous Track

2. Power

(On/Off) Button

DisqPlay Switch

4. Volume

Control Down Button

5. Volume

Control Up Button

6. Status

Panel

10. CD Next Track

11. Keyboard

12. Touch Pad

13. Left Touch Pad Button

14. Right Touch Pad Button

Front of Unit

7. CD

Play/Pause

8. CD

Stop

15. Integrated Speakers

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Left Side Components

Models and Features

Front Of Unit

Left Side Components

Right Side Components

Bottom Of Unit

Left Side Components

1. Modem/Phone Jack

2. Diskette Drive Slot

3. Diskette Eject Button

4. Battery Compartment

5. Left Speaker Port

Left Side Components

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Right Side Components

Models and Features

Front Of Unit

Left Side Components

Right Side Components

Bottom Of Unit

Right Side Components

Right Side

Components

Headphone/ Line-Out Jack

2. Line-in

Jack

3. External

Microphone Jack

4. CD Drive 9. PC

5. CD Drive

Light

6. CD Drive Eject Button

7. PC Card Top Slot

8. PC Card Bottom Slot

Card Eject Levers

10. Right Speaker Port

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Bottom Of Unit

Models and Features

Front Of Unit

Left Side Components

Right Side Components

Bottom Of Unit

Bottom of

Unit

1.Memory

Compartment

2. Feet

Bottom of Unit

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Diagnostic

Preliminary Steps

Before running POST, complete the following preliminary steps:

1. If a power-on password has been established, type the password and press the Enter key. If the password is not known,

2. Run Computer Setup.

3. Adjust the brightness and contrast.

4. Turn off the computer and its external devices.

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.

If the problem only occurs when an external device is connected to the computer, the

NOTE:

6. Install loopback plugs in the serial and parallel connectors if you would like

problem may be related to the external device or its cable. Verify this by running POST with and without the external device connected.

clear the password.

to test these ports.

7. Ensure the 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 completed, you are ready to run

POST.

Clearing the Power-On Password

Clearing the power-on password requires removing all Setup attributes that are programmed in the CMOS. If the password is not known, clear it by performing the following steps:

1. Turn off the computer.

2. Disconnect the power cord.

Remove the battery pack.

4. Remove the keyboard.

5. Remove the RTC battery (1) for 30 seconds as shown below. The password, together with other Setup attributes, will be cleared.

Clearing the Power-On Password

6. Turn the computer on to verify the power-on password has been cleared. If it has not been cleared, repeat these steps.

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Power On Self Test (POST)

Running POST

To run POST, complete the following steps:

Turn off the computer. Let stand for a 10 count, then turn the computer back on.

If POST does not detect any errors, the computer will not beep. This indicates successful completion of POST test. POST has run successfully and 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) Codes" for a list of POST

codes and their relevant descriptions.

If the system is not functioning well enough to run POST, or if the display is not

NOTE:

functioning well enough to show POST error messages, refer to the Troubleshooting tables.

Power-On Self-Test Messages

102 162 301 304 601 605 1780 1782

Probable Cause Recommended Action

102-System Board Failure

DMA, timers, etc. Replace the system board.

162-System Options Not Set

Configuration incorrect Run Computer Setup. CMOS reflects that an invalid

configuration has been set. RAM failure

Memory test data error XX000YZZ RAM failure Replace the system board.

301-Keyboard Error

Keyboard failure

Run Computer Setup.

1. Replace the memory modules.

2. Replace the system board.

1. Replace the memory modules.

2. Replace the system board.

1. Ensure the keys are not depressed during POST.

2. Reconnect the keyboard with the computer off.

3. Replace the keyboard.

304-Keyboard or System Unit Error

1. Replace the keyboard.

Keyboard or system board error

601-Diskette Controller Error

Mismatch in drive type or failure in the diskette controller

605-Diskette Drive Error

Mismatch in drive type Run Computer Setup.

1780-Primary Hard Drive 0 Failure

Disk 0 failed to respond

Hard drive format error

1782-Hard Drive Controller

2. Replace the TouchPad or mouse.

3. Replace the system board.

1. Run Computer Checkup (TEST).

2. Check and/or replace cables.

3. Replace the system board.

1. Run Computer Checkup (TEST).

2. Replace the hard drive.

1. Run Computer Checkup (TEST).

2. Replace the hard drive.

Hard drive controller failure

1. Run Computer Setup.

2. Replace the hard drive.

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Troubleshooting Without Diagnostics

This section provides information about how to identify and correct some common hardware, memory, and software problems. It also explains several types of common messages that may be displayed on the screen. The following pages contain troubleshooting information on:

Audio Memory Battery/Battery gauge PC Card CD drive Power Diskette/Diskette drive Printer Display Touch Pad Hard drive Keyboard/Numeric keypad Hardware Installation

Since symptoms can appear to be similar, carefully match the symptoms of the computer malfunction against the problem description in the Troubleshooting tables to avoid a misdiagnosis.

WARNING: To avoid a potential shock hazard during troubleshooting procedures, disconnect all power sources before removing the keyboard cover or the display bezel.

Before Replacing Parts

When troubleshooting a problem, check the following list for possible solutions before replacing parts:

● Verify that cables are connected properly to the suspected defective parts.

● Run Computer Setup after connecting external devices.

● Verify that all required device drivers are installed.

● Verify that all required changes have been made to the CONFIG.SYS file.

● Verify that all required changes have been made to the AUTOEXEC.BAT file.

● Verify that all printer drivers have been installed for each application.

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Keyboard Solutions

Solving Minor Problems

Some minor problems and possible solutions are outlined here. If the problem appears related to a software application, check the documentation provided with the software.

Solving Keyboard/Numeric Keypad Problems

Some common causes and solutions for keyboard/numeric keypad problems are listed in the following table.

Solving Keyboard/Numeric Keypad Problems

Problem Probable Cause Solution(s)

Embedded numeric keypad on computer keyboard is disabled.

Embedded numeric keypad is disabled and Num Lock function is on.

Num Lock function is not enabled.

External numeric keypad is connected to the computer.

Press the Shift+NumLk keys to enable the Num Lock function and embedded numeric keypad. The Num Lock icon on the status panel turns on.

Disconnect the external numeric keypad from the computer.

Back to Troubleshooting Without Diagnostics

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Hard Drive Solutions

Solving Minor Problems

Some minor problems and possible solutions are outlined here. If the problem appears related to a software application, check the documentation provided with the software.

Solving Hard Drive Problems

Some common causes and solutions for hard drive problems are listed in the following table.

CAUTION: To prevent loss of information, always maintain an up-to-date backup of your hard drive at all times, in case of errors or failures.

Solving Hard Drive Problems

Problem Probable Cause Solution(s)

Reading hard drive takes an unusually long time after restarting the computer.

System entered Hibernation due to low battery condition and is now exiting from it.

Give the system time to restore the previously saved data to its exact state before Hibernation.

Hard drive error occurs. Hard drive has bad sectors or

has failed.

Hard drive does not work. Hard drive is not seated

properly.

Back to Troubleshooting Without Diagnostics

Run Computer Checkup.

Turn off and unplug the computer, remove the battery pack, and remove and then reinstall the hard drive.

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Diskette Solutions

Solving Minor Problems

Some minor problems and possible solutions are outlined here. If the problem appears related to a software application, check the documentation provided with the software.

Some common causes and solutions for diskette and diskette drive problems are listed below.

Solving Diskette and Diskette Drive Problems

Problem Probable Cause Solution(s)

Diskette drive cannot write to a diskette.

Diskette is write-protected. Disable the diskette's write-

protect feature or use a diskette that is not writeprotected.

Computer is writing to the wrong drive.

Not enough space is left on the diskette.

Drive error has occurred. Run Computer Checkup from

Diskette is not formatted. Format the diskette. At

Check the drive letter in the path statement.

Use another diskette.

the Compaq Diagnostics diskette.

the system prompt, enter FORMAT A:

Diskette drive cannot read a diskette.

Cannot boot from diskette. Bootable diskette is not in

The wrong type of diskette is being used.

Diskette has a bad sector. Copy files to hard drive or

Drive error has occurred. Run Computer Checkup from

Diskette is not formatted. Format the diskette. At the

The floppy controller is disabled in F10 Setup

drive A. Diskette Boot has incorrect

setting in Computer Setup.

Use the type of diskette required by the drive.

another diskette. Reformat bad floppy.

the Compaq Diagnostics diskette.

system prompt, enter FORMAT A:

Re-enable the floppy controller in F10 Setup

Put the bootable diskette in drive A.

Run Computer Setup and set diskette as first to boot.

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Solving Audio Problems

Solving Minor Problems

Some minor problems and possible solutions are outlined here. If the problem appears related to a software application, check the documentation provided with the software.

Some common audio problems and solutions are listed in the following table.

Solving Audio Problems

Problem Probable Cause Solution(s)

Computer does not beep after the Power-On Self-Test (POST).

This is typical; it indicates successful completion of the Power-On Self-Test (POST).

No action is required.

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Battery Pack

Solving Minor Problems

Some minor problems and possible solutions are outlined in the following tables. If the problem appears related to a software application, check the documentation provided with the software.

Solving Battery Pack and Battery Gauge Problems

Some common causes and solutions for battery pack problems are listed below. The Solving Power Problems section in this chapter may also be

useful.

Solving Battery Pack and Battery Gauge Problems

Problem Probable Cause Solution(s)

Computer won't turn on when battery pack is inserted and power cord is unplugged.

Battery pack is discharged. Connect the computer to an

external power source and charge the battery pack.

Replace the battery pack with a fully charged battery pack.

Check the battery connectors on the system board to verify they are evenly spaced and that they are not bent or broken.

Computer is beeping and battery icon on the LCD status display is blinking.

Computer battery icon on the LCD status display blinks to indicate low battery condition, but computer does not beep.

Battery icon doesn't light and battery pack won't fast charge.

Battery charge is low. Immediately save any open

file(s). Then do one of the following:

■ Connect the computer to

an external power source to charge the battery pack.

■ Turn off the computer or

initiate Hibernation until you can find another power source or charge the battery pack.

Volume is turned down too low.

Battery pack is already charged

Adjust the volume.

No action is necessary

You have to set the date and time every time you turn on the computer.

Battery charge does not last as long as expected.

Battery pack was exposed to temperature extremes.

Battery pack is at end of its life.

RTC battery is dead. Replace the RTC battery.

Battery is being exposed to high temperatures or extremely cold temperatures.

Battery has partially selfdischarged.

Power management is disabled.

Allow time for the battery pack to return to room temperature.

Replace battery pack.

Keep the battery pack within the recommended operating temperature range 50° F to 104° F (10° C to 40° C) or recommended storage range 4° F to 86° F (-20° C to 30° C ). Recharge the battery pack.

Recharge the battery. Discharge the battery completely and then recharge it.

Set a power management level in Computer Setup.

Battery pack is warm to the touch after charging.

Battery pack operating time is far less than the documented average operating time.

An external device or PC Card is draining the battery.

Normal warming has occurred due to charging.

Power management is turned off or disabled.

An external device or PC Card is draining the battery.

Battery pack has partially selfdischarged.

Turn off or disconnect external devices when not using them.

No action is required.

Enable power management in Computer Setup and in Windows Power Properties.

Turn off or disconnect external devices when not using them.

Condition the battery pack by fully charging, fully discharging, then fully recharging it.

To maintain the charge, leave battery packs in the computer when it is connected to external power.

Battery pack is being exposed to high temperatures or extremely cold temperatures.

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If the computer is disconnected from external power for more than two weeks, remove battery packs from the computer to reduce the discharge rate.

Keep the battery pack within the recommended temperature ranges. Operating: 50° F to 104° F (10° C to 40° C) Storage: -4° F to 86° F (-20° C to 30° C )

Recharge the battery pack.

Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Power Solutions

Solving Minor Problems

Some minor problems and possible solutions are outlined here. If the problem appears related to a software application, check the documentation provided with the software.

Solving Power Problems

Also see Solving Battery and Battery Gauge Problems.

Solving Power Problems

Problem Probable Cause Solution(s)

Computer won't turn on and battery pack is not inserted*.

The computer doesn't timeout while on AC power

Computer is not connected to a power source.

Power cords to the external power source are unplugged.

Power adapter is defective. Replace AC Adapter and

The system is designed not to timeout while on AC power.

Insert battery or connect an external power source.

Ensure that power cords connecting the computer and the external power source are plugged in properly.

restart. Windows will spin down the

hard drive. Windows can be configured to power off the monitor using the display properties control panel applet. Alternatively, the user can change "BIOS-PM on AC" in the BIOS setup.

Computer turned off while it was left unattended and the power icon is off.

System board is defective. Replace the system board. System initiated Hibernation

due to a critical low-battery condition.

System initiated Hibernation after a preset timeout.

Replace the battery pack with a fully charged battery pack or connect the computer to an external power source. Then turn on the computer.

Turn on the computer.

* In rare cases, it may be necessary to remove the power cord and the battery, wait 30 seconds, and reinsert the power cord to power on the unit. The above steps reset the keyboard controller which is usually always powered, even when the computer appears to be off.

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

CD Drive Solutions

Solving Minor Problems

Some minor problems and possible solutions are outlined in the following tables. If the problem appears related to a software application, check the documentation provided with the software.

Solving CD Drive Problems

Some common causes and solutions for CD drive problems are listed in the following table.

Solving CD Drive Problems

Problem Probable Cause Solution(s)

CD drive cannot read a compact disc.

No CDs work at all. The Performance tab in

Compact disc is upside down or is improperly inserted in the CD drive.

CD is CD Plus or Pregap/Track 0 type.

System properties shows that one or more of the hard disks in your computer is using MSDOS Compatibility mode.

Open the CD loading tray, lay the compact disc in it (label side up), then close the tray.

Cannot read these type CDs in 24× CD drive. Remove the CD.

If the driver name listed as causing MS-DOS Compatibility mode is MBRINT13.SYS, your computer may be infected with a boot-sector virus. Please purchase a virus scanning software package (consult your local software retailer for recommendations) to check your system. If the application you purchase successfully eliminates the virus, scan (check) all of your diskettes before re-installing to prevent further contamination.

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Hardware Installation Solutions

Solving Minor Problems

Some minor problems and possible solutions are outlined here. If the problem appears related to a software application, check the documentation provided with the software.

Solving Hardware Installation Problems

Some common causes and solutions for hardware installation problems are listed here.

Solving Hardware Installation Problems

Problem Probable Cause Solutions(s)

A new device is not recognized as part of the computer system.

Cable(s) of new external device are loose or power cables are unplugged.

Power switch of new external device is not turned on.

Device is not seated properly. Turn off the computer and

Ensure that all cables are properly and securely connected.

Turn off the computer, turn on the external device, then turn on the computer to integrate the device with the computer system.

reinsert the device.

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack

Memory Solutions

Solving Minor Problems

Some minor problems and possible solutions are outlined here. If the problem appears related to a software application, check the documentation provided with the software.

Solving Memory Problems

Some common causes and solutions for memory problems are listed in the following table.

Solving Memory Problems

Problem Probable Cause Solution(s)

Memory count during PowerOn Self-Test (POST) is incorrect.

"Out of Memory" message is displayed on the screen or insufficient memory error occurs during operation.

Optional memory expansion card is installed incorrectly, is incompatible with the computer, or is defective.

System ran out of memory for the application.

Too many TSR (terminate-and stay-resident) applications are running.

Ensure that the optional memory expansion card is installed correctly.

Check the application documentation for memory requirements.

Install additional memory.

Remove from memory any TSR applications that you do not need.

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