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

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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

Notice | Preface | Home | Product Description | Troubleshooting | Illustrated Parts Catalog 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.

© 1998 Compaq Computer Corporation. All rights reserved. Printed in the U.S.A.

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

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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.

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 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

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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

Notice | Preface | Home | Product Description | Troubleshooting | Illustrated Parts Catalog 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

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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

Notice | Preface | Home | Product Description | Troubleshooting | Illustrated Parts Catalog 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

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.

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

Maintenance & Service Guide

Presario 1600 Series Portable Computers

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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

Nominal Operating

Maximum Average

Peak Operating

AC Power Requirements

Operating Voltage

Operating Current

Operating Frequency

Maximum Transient

Temperature

Operating

Non-operating

Relative Humidity (noncondensing)

U.S. Metric

1.96 in

4.95 cm

12.30 in

31.00 cm

10.08 in

25.40 cm

7.326Ib

3.33 kg

7.326Ib

3.33 kg

7.326Ib

3.33 kg

NiMH

Li-ion

W @ 9.6 V

W @ 14.4 V

W @ 9.6 V

W @ 14.4 V

W @ 9.6 V

W @ 14.4 V

100-240 V 0.8/0.4 A RMS 47-63 Hz

Meets IEC 801-4 and IEC801-5 1kV for 50 ns

50° to 95 °F

10° to 35 °C

-4° to 140 °F

-20° to 60 °C

Operating

10 to 90%

35°C to 90%

Non-operating (tw = 38.7°C

5 to 95%

60°C to 95%

max)

 

 

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

 

Applicable product safety standards specify thermal limits for plastic NOTE: surfaces. Compaq Presario 1600 Series Portable Computers operate

well within this range of temperatures.

Back to top

 

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

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)

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System DMA

Hardware DMA

System Function

DMA 0

ES1869 Plug and Play AudioDrive

DMA 1

ES1869 Plug and Play AudioDrive

DMA 2

Diskette Drive

DMA 4

Direct Memory Access Controller

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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

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

Back to top

 

System Memory Map

Memory Address

System Function

00000000h-0009FFFFh

System board extension for PnP BIOS

000A0000h-000AFFFFh

MagicGraph128XD

000B0000h-000BFFFFh

MagicGraph128XD

000C0000h-000CBFFFh

MagicGraph128XD

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

Back to top

 

Memory Expansion

 

System Memory

Expansion Board

Total Memory

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.

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

Notice | Preface | Home | Product Description | Troubleshooting | Illustrated Parts Catalog 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 Port Replicator for connectors located on the port replicator.

NOTE: The signals in all tables of this appendix are considered active high unless otherwise indicated by an asterisk (*).

Parallel Connector

Serial Connector

Keyboard/Mouse

External VGA Monitor

Phone Line to Wall Jack

Port Replicator

Parallel Connector

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

 

Back to top

 

Serial Connector

 

Connector

Pin

Signal

 

1

Carrier Detect

 

2

Receive Data

 

3

Transmit Data

 

4

Data Terminal Ready

 

5

Signal Ground

 

6

Data Set Ready

 

7

Ready to Send

 

8

Clear to Send

 

9

Ring Indicator

 

Keyboard/Mouse

 

Connector

Pin

Signal

 

1

Data

 

2

Not defined

 

3

Ground

 

4

+5 VDC

 

5

Clock

 

6

Not defined

Back to top

 

External VGA Monitor

 

Connector

Pin

Signal

1 Red Analog

2 Green Analog

3 Blue Analog

4 Not connected

5 Ground

6 Ground Analog

7 Ground Analog

8 Ground Analog

9 Not connected

10 Ground

11 Monitor Detect

12 DDC2B Data

13 Horizontal Sync

14 Vertical Sync

15 DDC2B Clock

Back to top

 

Phone Line to Wall Jack

 

Connector

Pin

Signal

 

1

Unused

 

2

Unused

 

3

Tip

 

4

Ring

 

5

Unused

 

6

Unused

Back to top

 

 

 

Port Replicator

 

 

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.

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

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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

2:00 hr

 

termination

 

Model 2/Li ion Battery Pack

4.5 hours premature

2:50 hr

 

termination

 

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

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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.

 

Model 1625

Model 1635

Model 1640

Display

12.1"HPA

12.1" TFT

12.1" TFT

Processor

266 MMX

233 MMX

266 MMX

AMD K6

Hard Drives

3.2 GB

3.2 GB

4 GB

Speaker

JBL Pro

JBL Pro

JBL Pro

Assembly

Modem

K-56K D/F

M++ 56K D/F

K-56 K D/F

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

Maintenance & Service Guide

Presario 1600 Series Portable Computers

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Front of Unit

Models and

Features

Front Of

Unit

Left Side

Components

Right Side

Components

Bottom Of

Unit

Front of Unit

Front of Unit

1. Display 9. CD

Previous

Track

2. Power

10. CD

(On/Off)

Next

Button

Track

3.11. DisqPlay Keyboard Switch

4.Volume 12. Touch Control Pad Down

Button

5.Volume 13. Left Control Up Touch Pad

Button Button

6. Status

14. Right

Panel

Touch Pad

 

Button

7.CD 15. Play/Pause Integrated

Speakers

8.CD

Stop

Maintenance & Service Guide

Presario 1600 Series Portable Computers

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Left Side Components

Models and

Features

Front Of

Unit

Left Side

Components

Right Side

Components

Bottom Of

Unit

Left Side Components

1.

4.

Battery

Modem/Phone Compartment

Jack

 

 

2. Diskette

5.

Left

Drive Slot

Speaker Port

3. Diskette

Eject Button

Left Side Components

Maintenance & Service Guide

Presario 1600 Series Portable Computers

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Right Side Components

Models and

Features

Front Of

Unit

Left Side

Components

Right Side

Components

Bottom Of

Unit

Right Side Components

Right Side

Components

1.

6. CD

Headphone/

Drive

Line-Out

Eject

Jack

Button

2. Line-in

7. PC

Jack

Card

 

Top

 

Slot

3. External

8. PC

Microphone

Card

Jack

Bottom

 

Slot

4.CD Drive 9. PC Card Eject Levers

5.CD Drive 10. Light Right

Speaker Port

Maintenance & Service Guide

Presario 1600 Series Portable Computers

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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

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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, clear the password.

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: problem may be related to 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.

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.

3.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

Notice | Preface | Home | Product Description | Troubleshooting | Illustrated Parts Catalog 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

CMOS reflects that an invalid configuration has been set.

RAM failure

Memory test data error XX000YZZ RAM failure

Keyboard failure

Run Computer Setup.

Run Computer Setup.

1.Replace the memory modules.

2.Replace the system board.

1.Replace the memory modules.

2.Replace the system board.

Replace the system board.

301-Keyboard Error

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 2. Replace the TouchPad or mouse.

3. Replace the system board.

601-Diskette Controller Error

Mismatch in drive type or failure in the

1.

Run Computer Checkup (TEST).

2.

Check and/or replace cables.

diskette controller

3.

Replace the system board.

 

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

1.Run Computer Checkup (TEST).

2.Replace the hard drive.

1.Run Computer Checkup (TEST).

2.Replace the hard drive.

1782-Hard Drive Controller

Hard drive controller failure

1.

Run Computer Setup.

2.

Replace the hard drive.

 

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

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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

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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

Num Lock function is not

computer keyboard is disabled.

enabled.

Embedded numeric keypad is

External numeric keypad is

disabled and Num Lock

connected to the computer.

function is on.

 

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.

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

Notice | Preface | Home | Product Description | Troubleshooting | Illustrated Parts Catalog 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.

Hard drive error occurs. Hard drive does not work.

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

Hard drive has bad sectors or has failed.

Hard drive is not seated properly.

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

Run Computer Checkup.

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

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

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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 is write-protected.

Disable the diskette's write-

diskette.

 

protect feature or use a

 

 

diskette that is not write-

 

 

protected.

 

Computer is writing to

Check the drive letter in the

 

the wrong drive.

path statement.

 

Not enough space is left

Use another diskette.

 

on the diskette.

 

 

Drive error has occurred.

Run Computer Checkup from

 

 

the Compaq Diagnostics

 

 

diskette.

 

Diskette is not formatted.

Format the diskette. At

 

 

the system prompt, enter

 

 

FORMAT A:

Diskette drive cannot read a diskette.

The wrong type of diskette is being used.

Diskette has a bad sector.

Use the type of diskette required by the drive.

Copy files to hard drive or another diskette. Reformat bad floppy.

 

Drive error has occurred.

Run Computer Checkup from

 

 

the Compaq Diagnostics

 

 

diskette.

 

Diskette is not formatted.

Format the diskette. At the

 

 

system prompt, enter FORMAT

 

 

A:

 

The floppy controller is

Re-enable the floppy controller

 

disabled in F10 Setup

in F10 Setup

Cannot boot from diskette.

Bootable diskette is not in

Put the bootable diskette in

 

drive A.

drive A.

 

Diskette Boot has incorrect

Run Computer Setup and set

 

setting in Computer Setup.

diskette as first to boot.

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

Notice | Preface | Home | Product Description | Troubleshooting | Illustrated Parts Catalog 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.

Problem

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

Solving Audio Problems

 

Probable Cause

Solution(s)

This is typical; it indicates

No action is required.

successful completion of the

 

Power-On Self-Test (POST).

 

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

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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 discharged.

Connect the computer to an

battery pack is inserted and

 

external power source and

power cord is unplugged.

 

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

Battery charge is low.

Immediately save any open

and battery icon on the LCD

 

file(s). Then do one of the

status display is blinking.

 

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.

Computer battery icon on the

Volume is turned down too

Adjust the volume.

LCD status display blinks to

low.

 

 

indicate low battery condition,

 

 

 

but computer does not beep.

 

 

 

Battery icon doesn't light and

Battery pack is already

No action is necessary

battery pack won't fast charge. charged

 

 

 

Battery pack was exposed to

Allow time for the battery pack

 

temperature extremes.

to return to room temperature.

 

Battery pack is at end of its

Replace battery pack.

 

life.

 

 

You have to set the date and

RTC battery is dead.

Replace the RTC battery.

time every time you turn on

 

 

 

the computer.

 

 

 

Battery charge does not last as long as expected.

Battery pack is warm to the touch after charging.

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

Battery is being exposed to

Keep the battery pack within

high temperatures or

the recommended operating

extremely cold temperatures.

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.

Battery has partially selfdischarged.

Power management is disabled.

An external device or PC Card is draining the battery.

Normal warming has occurred due to charging.

Power management is turned off or disabled.

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

Set a power management level in Computer Setup.

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.

An external device or PC Card is draining the battery.

Battery pack has partially selfdischarged.

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

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.

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.

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

Notice | Preface | Home | Product Description | Troubleshooting | Illustrated Parts Catalog 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

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.

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

Solution(s)

Insert battery or connect an external power source.

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

Replace AC Adapter and 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

Replace the battery pack with

due to a critical low-battery

a fully charged battery pack

condition.

or connect the computer to

 

an external power source.

 

Then turn on the computer.

System initiated Hibernation

Turn on the computer.

after a preset timeout.

 

* 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

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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.

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

CD is CD Plus or Pregap/Track 0 type.

The Performance tab in 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

Notice | Preface | Home | Product Description | Troubleshooting | Illustrated Parts Catalog 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

Cable(s) of new external

Ensure that all cables are

as part of the computer system.

device are loose or

properly and securely

 

power cables are unplugged.

connected.

Power switch of new external device is not turned on.

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

Device is not seated properly. Turn off the computer and reinsert the device.

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Maintenance & Service Guide

Presario 1600 Series Portable Computers

Notice | Preface | Home | Product Description | Troubleshooting | Illustrated Parts Catalog 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.

Problem

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.

Solving Memory Problems

 

Probable Cause

Solution(s)

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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