Compaq 1805 User Manual

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Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Notice Preface Product

Description Troubleshooting Illustrated Parts

Catalog Removal &

Replacement Procedures

Specifications Connector Pin

Assignments Battery Pack

Operations

Compaq Presario 1800 Series Portable Computer is a continuation of the new generation of multimedia portable computers with an innovative integrated design, outstanding audio and video, advanced core features, and attractive styling. This full-function, Pentium II - based series of portable computers allows full desktop functionality and additional connectivity via the optional port replicator.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

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 1800 Series Portable Computers

First Edition (Oct. 1998) Compaq Computer Corporation

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Preface

This is a troubleshooting guide that can be used for reference when servicing the Compaq Presario 1800 Series Portable Computers.

Compaq Computer Corporation reserves the right to make changes to the Compaq Presario 1800 Series Portable Computers without notice.

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 commentary, sidelights, or interesting points of

NOTE:

information.

Text set off in this manner presents clarifying information or specific instructions.

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

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.

The following documentation is available to support this product:

Compaq Presario 1800 Series Portable Computer documentation set Service Training Guides

Compaq Service Advisories and Bulletins

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Product Description

Models and Features

Controls and Lights

Left Side Components

Right Side Components

Bottom of Unit

Rear Connectors

Power Management for Windows 98

Compaq Presario 1800 Series Series Portable Computer is a continuation of the new generation of multimedia portable computers with an innovative integrated design, outstanding audio and video, advanced core features, and attractive styling. This fullfunction, Pentium II based series of portable computers allows full desktop functionality and additional connectivity via the optional port replicator.

Maintenance & Service Guide

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Troubleshooting

Presario 1800 Series

Models: 1805 and 1810

Preliminary Steps Clearing the Power-On

Password Power-On Self Test

(POST) Compaq Diagnostics Diagnostic Error Codes Troubleshooting

Without Diagnostics Solving Minor

Problems Contacting Compaq

Support

This section covers troubleshooting information for the Compaq Presario 1800 Series Portable Computers. The basic steps in troubleshooting include:

1. Follow the

Preliminary Steps.

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

3. Follow the recommended actions described in the diagnostic tables, if you are unable to run POST or if POST displays an error message.

When following the recommended actions in the Sections on POST and

Diagnostic Error Codes

perform them 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.

If the problem is intermittent, check the

NOTE:

computer several times to verify that the problem is solved.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Illustrated Parts Catalog

System Unit Boards Display

Assembly Mass Storage

Devices Miscellaneous

Cable Kit Cables Miscellaneous

Hardware and Plastics Kit

Miscellaneous Parts

Documentation and Software

This section provides an breakdown and identifies the spare parts ordering number associated with each item(s) for the Compaq Presario 1800 Series Portable Computers.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Removal and Replacement Procedures

This section explains the removal and replacement procedures for the computer.

Serial Number Location

Electrostatic Discharge

Service Considerations

Cables and Connectors

Preparing the Computer for Disassembly

Battery Pack Palmrest

Cover with Touch Pad

Keyboard Heatspreader

Report the computer serial number to Compaq when requesting information or ordering spare parts.

Modem Processor Status Panel Interface

Board Hard Drives Battery

Charger Board CD or DVD

Drive Display Panel

Assembly Upper CPU

Cover Speaker

Assembly Diskette Drive Fan Assembly Audio Board System Board Memory

Module

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Specifications

This chapter covers the following specifications of Compaq Presario 1800 Series Portable Computers:

Computer models

Physical and environmental

System Interrupts

System DMA

System I/O Address

System Memory Catalog

Display

Memory expansion

Dimensions

Height Depth Width

Diskette drive

Hard drive

CD and DVD drive

Battery pack

Computer Specifications

U.S. Metric

1.97 in

12.20 in

10.08 in

4.95 cm

31.00 cm

25.40 cm

Weight

Model 1805 Model 1810

Stand-Alone (Battery Pack) Power Requirements

Nominal Operating Maximum Average Peak Operating

AC Power Requirements

Operating Voltage Operating Current Operating Frequency

Maximum Transient

7.326 Ib

NiMH

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

3.33 kg

Li-ion

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

Temperature

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

Relative Humidity (noncondensing)

Operating 10 to 90% 35°C to 90% Nonoperating (tw = 38.7°C max) 5 to 95% 60°C to 95%

Altitude

Operating 0 to 10,000 ft 0 to 3.15 km Nonoperating 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 Nonoperating 1.5 G NOTE: Applicable product safety standards specify thermal limits for plastic surfaces.

Compaq Presario 1800 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 Internal Modem IRQ4 Communication Port (COM1) IRQ5 Audio Controller IRQ6 Diskette Drive IRQ7 Parallel Port (LPT 1) (default) IRQ8 System CMOS/Real-Time Clock IRQ9 IRQ Holder for PCI Steering IRQ9 PCI-1131 CardBus Controller IRQ9 IRQ Holder for PCI Steering IRQ9 IRQ Holder for PCI Steering IRQ9 PCI-1131 CardBus Controller IRQ9 Video Controller IRQ11 Intel PCI to USB Universal Host Controller

IRQ11 IRQ Holder for PCI Steering IRQ12 PS/2 TouchPad/Mouse IRQ13 Numeric data processor IRQ14 Intel PCI Bus Master IDE Controller

IRQ14 Primary IDE Controller (dual fifo) IRQ15 Intel PCI Bus Master IDE Controller

IRQ15 Secondary IDE Controller (dual fifo)

System DMA

Hardware DMA System Function

DMA 0 Audio Controller DMA 1 Audio Controller DMA 2 Diskette Drive DMA 4 DMA Controller

System I/O Address

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

0000h-000Fh DMA Controller

0020h-0021h Interrupt Controller

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

00A0h-00A1h Programmable interrupt controller

00C0h-00DFh DMA

00ECh-00EFh Motherboard resources

00F0h-00FFh Numeric data processor

0170h-0177h Intel PCI Bus Master IDE Controller

0170h-0177h Secondary IDE Controller (dual fifo)

01F0h-01F7h Intel PCI Bus Master IDE Controller

01F0h-01F7h Primary IDE Controller (dual fifo)

0201h-0201h Gameport Joystick

0220h-022Fh ES1869 Plug and Play AudioDrive

02F8h-02FFh Compaq Presario 56K-DF

0330h-0331h ES1869 Plug and Play AudioDrive

0376h-0376h Secondary IDE controller (dual fifo)

0376h-0376h Intel PCI Bus Master IDE Controller

0378h-037Fh Printer Port (LPT1)

0388h-038Bh ES1869 Plug and Play AudioDrive

03B0h-03BBh Video Controller

03C0h-03DFh Video Controller

03F0h-03F5h Standard Floppy Disk Controller

03F6h-03F6h Intel PCI Bus Master IDE Controller

03F6h-03F6h Primary IDE controller (dual fifo)

03F7h-03F7h Standard Floppy Disk Controller

03F8h-03FFh Communications Port (COM1)

04D0h-04D1h Motherboard resources

0800h-0807h ES1869 Control Interface

0CF8h-0CFFh PCI bus

2180h-218Fh Motherboard resources

8000h-803Fh Motherboard resources

FCD0h-FCD7h Primary IDE controller (dual fifo)

FCD0h-FCDFh Intel PCI Bus Master IDEController

FCD8h-FCDFh Secondary IDE controller (dual fifo)

FCE0h-FCFFh Intel PCI to USB Universal Host Controller

System Memory Catalog

Memory Address System Function

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

000DC000h-000FFFFFh System board extension for PnP BIOS 00100000h-03FFFFFFh System board extension for PnP BIOS 05000000h-05000FFFh PCI-1131 CardBus Controller 05001000h-05001FFFh PCI-1131 CardBus Controller 80000000h-803FFFFFh Intel Pentium(r) II Processor to PCI bridge FD000000h-FDFFFFFFh FEA00000h-FEBFFFFFh

Graphics Controller Graphics Controller

FED00000h-FEDFFFFFh FFF80000h-FFFFFFFFh Motherboard resources

Dimensions

Height Width

Display Dimensions

Width Height

Graphics Controller

13.3" (Diagonal) TFT Display U.S. Metric

Information not available

Depth

Weight

Contrast Ratio

Brightness

Total Power Consumption

Information not available

Memory Expansion

System Memory Expansion Board

Total Memory

Memory

32-MB 16-MB 48-MB 32-MB 32-MB 64-MB 32-MB 64-MB 96-MB

Diskette Drive Capacity per Diskette (High/Low) Diskette Size

Information not available Information not available

Number of LED Indicators (Read/Write)

Number of Drives Supported Drive Rotation (rpm) Transfer Rate (Kbps) Bytes per Sector Sectors per Track (High/Low) Tracks per Side (High/Low) Access Times

Track-to-Track (ms) Average (ms) Setting Time (ms) Latency Average (ms)

Information not available

Information not available Information not available Information not available Information not available Information not available Information not available Information not available

Cylinders (High/Low) Number of Read/Write Heads

Capacity Per Drive

3.2-GB 4.0-GB 6.4-GB

Information not available

Drive Type

Information not available

Logical

Information not

Information not available Information not available

Hard Drives

Information not available

Information not

Information not available

Information not

Configuration

available

available Cylinders Heads Sectors per track Bytes per sector

Seek Times (Typical, Including

Information not available

Information not

available settling in ms) Single track Average Full stroke

Transfer Rate

At interface

Information not available

Information not

available

DVD Drive

Dimensions Weight Rotational Speed Typical Transfer Rate

DVD Drive

Information not available Information not available Information not available Information not available

Sustained Data Transfer Rate

Access Time

Information not available

Average Random Access Time

Spin Up time Data Buffer Capacity

Information not available Information not available

CD Drive

Dimensions Weight Rotational Speed Typical Transfer Rate

24× CD Drive

Information not available Information not available Information not available Information not available

Sustained Data Transfer Rate

Access Time

Information not available

Average Random Access Time

Spin Up time Data Buffer Capacity

Information not available Information not available

Dimensions

Height Length Width

Weight Battery Pack Operating

Time Energy

Nominal Open Circuit Voltage Capacity Power

Environmental Requirements

Operating Temperature Non-operating Temperature

Battery Pack

Nickel Metal Hydride (NiMH) Lithium Ion (Li ion) *

0.8 in (20.3 mm)

5.7 in (145 mm)

3.1 in (78.7 mm)

0.8 in (20.3 mm)

5.7 in (145 mm)

3.1 in (78.7 mm)

1.01 Ib (458.1 g) 0.90 Ib (408.2 g) 2:30 hr 3:00 hr

9.6 V 3200mAH 40 W

32° F (0-50° C)

-20° C -60° C 5° C-45° C

14.4 V 2500mAH 40 W

32° F (0-50° C)

-20° C -60° C 5° C-45° C

Charging Temperature

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Connector Pin Assignments

This appendix provides connector pin assignment tables for Compaq Presario 1800 Series Portable Computers. For more information on connectors, refer to the section on Rear Connectors.

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

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

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

Not connected

Ground

Monitor Detect

DDC2B Data

Horizontal Sync

Vertical Sync

DDC2B Clock

Universal Serial Bus

Connector Pin Signal

1 Ground

2 D+

3 D-

4 Power

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 USB 0 - 49 MIDI Out 69 V. Sync 10 Joystick Data D 30 USB 0 + 50 +5V 70 Ground 11 Lp Select In 31 USB 1 - 51 +5V 71 H. Sync 12 Lp Paper End 32 USB 1+ 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.

Modem

Connector Pin Signal

Unused

Tip

Ring

Unused

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Battery Pack Operating Time

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

Increase battery pack operating time Conditioning a battery pack Disposal of a used battery pack

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

The power consumption requirements for PC Cards vary widely. Some cards drain

NOTE:

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.

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.

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.

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.

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.

The table below shows battery pack charge times by model.

Battery Charge Time

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

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. Battery packs should be handled 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 expose potentially harmful battery components.

Top of Page

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Models and Features

Controls and Lights

Left Side Components

Right Side Components

Bottom of Unit

Rear Connectors

Power Management for Windows 98

Display Processor

Hard Drive CD Drive Modem

Compaq Presario 1800 Series

Portable Computer Models

Model 1805

Model 1810

13. 3" TFT 13. 3" TFT Pentuim II/266

MMX

Pentuim II/300 MMX

3.2-GB or 4.0-GB 6.4-GB or 4.0-GB 24× MAX DVD Drive M++ 56.0 Kbps or

K-56.0 Kbps with ITU V.90

M++-56.0 Kbps or K-56.0 Kbps with ITU V.90

Maintenance & Service Guide

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Controls and Lights

Presario 1800 Series

Models: 1805 and 1810

Models and Features

Controls and Lights

Left Side Components

Right Side Components

Bottom of Unit

Rear Connectors

Power Management for Windows 98

Front of Unit

1. Display 9.DVD/CD Previous

Track

2. Power

(On/Off) Button

10. DVD/CD Next Track

DisqPlay

11. Keyboard

Switch

4.Volume

Control

12. Touch Pad

Down Button

5. Volume

Control Up Button

13. Left Touch Pad Button

6. Status

Panel

DVD/CD Play/Pause

DVD/CD Stop

14. Right Touch Pad Button

15. Integrated Speakers

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Left Side Components

Models and Features

Controls and Lights

Left Side Components

Right Side Components

Bottom of Unit

Rear Connectors

Power Management for Windows 98

Modem Jack

Diskette Drive Slot

Diskette Eject Button

Battery Pack

5. Left

Speaker Port

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Models and Features

Controls and Lights

Left Side Components

Right Side Components

Bottom of Unit

Rear Connectors

Power Management for Windows 98

Headphone Out

2.Line-In Jack

3. External

Microphone Jack

4. CD or DVD

Drive

5. CD or DVD

Eject Button

6. CD or DVD Manual Eject Hole

7. PCMCIA (Top Slot)

8.PCMCIA (Bottom Slot)

9.PCMCIA Eject Levers

10. Right Speaker Port

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Bottom of Unit

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Pin Assignments | Battery Pack Operations

Models and Features

Controls and Lights

Left Side Components

Right Side Components

Bottom of Unit

Rear Connectors

Power Management for Windows 98

1. Memory

Compartment

2. Feet

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Models and Features

Controls and Lights

Left Side Components

Right Side Components

Bottom of Unit

Rear Connectors

Power Management for Windows 98

1.Keyboard/Mouse

Port

2. Parallel Printer

Port

3. Port Replicator 8. AC Adapter

4. Fan Exhaust 9. Security Slot

5. Serial Port

6. External Monitor Port

7. USB

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Models and Features

Controls and Lights

Left Side Components

Right Side Components

Bottom of Unit

Rear Connectors

Power Management for Windows 98

This section is an overview of the Compaq Presario 1800 Series Portable Computer Port Replicator and covers the following topics:

System Overview Features Port Replicator Rear Connectors 80-Pin Connectors

System Overview

A manual docking mechanism on the Compaq Presario 1800 Series Portable Computer Port Replicator docks Compaq Presario 1800 Series Portable Computers. When the computer is docked, the 80-pin external options connector

handles the entire electrical interface (both power and signal connections) between the computer and the Port Replicator Rear.

Features

The Compaq Presario 1800 Series Portable Computer Port Replicator provides all the connectors supported by the Compaq Presario 1800 Series Portable Computers. They include:

External keyboard External mouse MIDI/game port External monitor Serial Parallel AC Adapter Dual USB ports (Not supported on all models.)

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Power Management for Windows 98

The following power management features are available for conserving AC power and extending battery operating time:

Power Management Settings Sleep

Hibernation Battery operating time Rebooting After a Lockup Servicing Your Computer - Full Off Mode

Depending on your patterns of computer use, you can set different levels of power management. These different power management levels can be activated based on the amount of time passed since the last system activity. System activity examples, include keyboard or mouse movement, CD (while under program control that monitors Sleep), and modem use.

You can select different conditions or power schemes through Power Management..The optional settings are Home/Office Desk, Portable/ Laptop and Always On. From the default settings, you can change the following settings.

the System goes to Sleep (Standby) mode the screen times out and goes blank the hard drive spins down

Each of these system components will go to sleep after the selected or default periods of inactivity. (The setting for hard drive must be less than or equal to the setting for System.)

If you're on a network, it's recommended that you set System Standby to

IMPORTANT:

Never.

There are five categories of power management settings under the Control Panel. The default setting for each feature is listed below in the tables.

Tab: Power Schemes: Plugged in Running on

Batteries

Always on System

Never 15 minutes

Standby: Turn OFF Monitor Always on System

After 15 minutes After 10 minutes After 15 minutes After 10 minutes

Standby:

Tab: ALARMS::

Low Battery Alarm: 10% Critical Battery Alarm 0% Alarm Actions: X Display Message Notification

Text Action No Action

Tab: POWER METER: Default Tab: ADVANCED Default

Tab: POWER METER: Monitor Laptop Display (Maximum resolution according to unit display size)

Tab: Device Manager Default:

Disk Drives: CD ROM:

X DMA X DMA

You can select Sleep mode instead of turning off the computer when you have finished using it. This allows the computer to wake up faster than turning it completely off and saves power over the active (On) mode. Compaq Presario Notebook computers have two levels of sleep, Hibernation and Sleep.

Hibernation - by pushing the power button once your computer will perform a save to disk followed by a shut down of the computer into Off mode.

Sleep - is a low power mode, also referred to as Standby mode. While in Sleep mode, your computer will maintain system information and open files. Unsaved information will be lost if you turn off your system prior to system wake-up, or if you lose power while using the AC adapter.

CAUTION: While in Sleep mode, your computer will maintain system information and open

files. Unsaved information will be lost if you turn off your system prior to system wakeup, or if you lose power while using the AC adapter.

Hibernation helps conserve battery life and protects your data. Hibernation can be a routine power saving event, or can be the result of a low battery condition. As it enters Hibernation, your computer will display a progress screen, as it automatically saves the machine state before it shuts down and turns itself off. Your computer will automatically go into Hibernation, when the battery has little power left, or when the system (operating on battery power) has been in Sleep mode for more than an hour. You can also manually initiate Hibernation by pressing the power button once while the system is active. To restore the computer's previous state, simply press the power button once again. While waking up, the computer will display a progress screen.

The following table shows the conditions and indicators for getting in and out of the various power management modes, Sleep, Hibernation and Off.

Mode To Initiate To End Indicators

Sleep

Manual keys combination

Press any key Flashing green

Power LED

- Fn+F4

Time Out Default 15 minutes. If on Battery power (system will not go to Sleep if on AC power)

Hibernate Manual - Press

Power Button once

Time Out Default If low battery or after 1 hour of sleep

Press Power Button once

No Power LED, blank screen

(system will not Hibernate if on AC power)

Off Perform normal

Windows shutdown via the start button, or press and hold down the power button for 4 seconds

Press Power Button once

No Power LED, blank screen

If you need to install or replace components in your system, you must turn the computer off . Follow the instructions above for properly putting the computer into Off mode, unplug from the outlet and remove the battery (see battery section for instruction on removing battery).

Occasionally you may encounter a frozen keyboard or a locked screen. To reboot your computer (as if from a cold start) press and hold down the Power Button for at least four seconds, which will cause a manual shutdown. Then, restart it with a single press of the Power Button. If it still doesn't recover, press the Power Button and hold it for four seconds to shut it down, then, remove the battery or unplug the AC power for at least 30 seconds. Reinsert the battery or reconnect AC power and press the Power Button once to reboot.

Battery operating time is affected by variables, such as the following:

Power conservation settings

Hardware configuration

Software applications

Installed options

Display brightness

Hard drive usage

Power button

Changes in operating temperature

Type and number of installed PC Cards

For more information on increasing battery pack operating time, conditioning the battery pack, and disposing of a used battery pack, refer to the

Battery Pack Operations.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

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 Checkup.

3. Turn off the computer and its external devices.

4. 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 problem may be related to the external

IMPORTANT:

device or its cable. Verify this by running POST with and without the external device connected.

5. Install loopback plugs in the serial and parallel connectors if you would like to test these ports.

6. Ensure the hard drive is installed in the computer.

7. 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.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Power-On Self Test (POST)

To run POST, complete the following steps:

Turn off the computer, then turn on the computer.

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" in the tables 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 functioning

NOTE:

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

Power-On Self-Test Messages

102-System Board Failure

Probable Cause Recommended Action

DMA, timers, etc. Replace the system board.

162-System Options Not Set

Probable Cause Recommended Action

Configuration incorrect Run Computer Setup. CMOS reflects that an invalid

Run Computer Setup.

configuration has been set. RAM failure 1. Replace the memory modules.

2. Replace the system board.

Memory test data error 1. Replace the memory modules.

2. Replace the system board.

XX000YZZ RAM failure Replace the system board.

XX000YZZ 201-Memory Error

Probable Cause Recommended Action

301-Keyboard Error

Probable Cause Recommended Action Keyboard failure 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

Probable Cause Recommended Action Keyboard or system board error 1. Replace the keyboard.

2. Replace the TouchPad or mouse.

3. Replace the system board.

601-Diskette Controller Error

Probable Cause Recommended Action Mismatch in drive type or failure in the

1. Run Computer Checkup (TEST).

diskette controller

2. Check and/or replace cables.

3. Replace the system board.

605-Diskette Drive Error

Probable Cause Recommended Action Mismatch in drive type Run Computer Setup.

1780-Primary Hard Drive 0 Failure

Probable Cause Recommended Action Disk 0 failed to respond 1. Run Computer Checkup (TEST).

2. Replace the hard drive.

Hard drive format error 1. Run Computer Checkup (TEST).

2. Replace the hard drive.

1782-Hard Drive Controller

Probable Cause Recommended Action Hard drive controller failure 1. Run Computer Setup.

2. Replace the hard drive.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

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 for

30 seconds. The password, together with other Setup attributes, will be cleared.

6. Reassemble the computer.

7. Turn on the computer to verify that the power-on password has been cleared. If it has not been cleared, repeat Steps 1 through

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Compaq Diagnostics

Compaq Diagnostics is installed on the hard drive of the computer. Run the Diagnostics utilities when you want to view or test system information and if you have installed or connected devices. If you run Compaq Diagnostics from a diskette, ensure that it is version 10.11 or later.

The Diagnostics menu includes the following utilities:

Computer Checkup (TEST) View System Information (INSPECT) Prepare Computer for a Compaq Service Call (RemotePaq)

If you have a problem you cannot solve, run the Diagnostics utilities before you call for support. Run Computer Checkup and select to save the device list to a file and to print or to save the log of errors. Run the View System Information (INSPECT) utility and select to print or to save that information. Have the files or the printed information available when you call for support.

Computer Checkup (TEST) determines whether the various computer components and devices are recognized by the system and are functioning properly. You can display, print, or save the information generated by Computer Checkup.

Follow these steps to run Computer Checkup:

1. Plug the computer into an external power source. (A low battery condition could interrupt the program.)

2. Turn on the external devices that you want to test. Connect the printer if you want to print a log of error messages.

3. Insert the Compaq Diagnostics diskette in drive A.

4. Turn on or restart the computer. The computer starts from drive A, and the Diagnostics Welcome screen appears.

5. Press Enter to continue. The Diagnostics menu appears.

6. Select Computer Checkup from the Diagnostics menu. A Test Option menu appears.

7. Select View the Device List from the Test Option menu. A list of the installed Compaq devices appears.

8. If the list of installed devices is correct, select OK. The Test Option menu appears.

If the list is incorrect, ensure that any new devices are installed

NOTE:

properly.

9. Select one of the following from the Test Option menu:

Quick Check Diagnostics. Runs a quick, general test on each device with

a minimal number of prompts. If errors occur, they display when the testing is complete. You cannot print or save the error messages.

Automatic Diagnostics. Runs unattended, maximum testing of each

device with minimal prompts. You can choose how many times to run the tests, to stop on errors, or to print or save a log of errors.

Prompted Diagnostics. Allows maximum control over testing the devices.

You can choose attended or unattended testing, decide to stop on errors, or choose to print or save a log of errors.

10. Follow the instructions on the screen as the devices are tested. When testing is complete, the Test Option menu appears.

11. Exit the Test Option menu.

12. Exit the Diagnostics menu.

The View System Information (INSPECT) utility provides information about the computer and installed or connected devices. You can display, print, or save the information.

Follow these steps to run View System Information (INSPECT) from the Compaq Diagnostics diskette:

1. Turn on the external devices that you want to test. Connect the printer if you want to print the information.

2. Insert the Compaq Diagnostics diskette in drive A.

3. Turn on or restart the computer. The computer starts from drive A, and the Diagnostics Welcome screen appears.

4. Press Enter to continue. The Diagnostics menu appears.

5. Select View System Information (INSPECT) from the Diagnostics menu.

6. Select the item you want to view from the following list:

System Memory ROM Audio Keyboard Operating system System ports System files System storage Windows files Graphics

7. Follow the instructions on the screen to cycle through the screens, to return to the list and choose another item, or to print the information.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

ontacting Compaq Support

Obtain the following information before contacting Compaq Reseller Support:

Product name Product serial number Purchase date Conditions under which the problem occurred Any error messages that have occurred Hardware configuration Type of printer connected Hardware/software being used Printed result of Computer Checkup (TEST) Printed copies of and files, if possible

To ship the computer, complete the following steps:

1. Back up the critical hard drive files. Ensure that backup tapes/diskette are not exposed to electrical or magnetic fields while stored in transit.

2. Turn off the computer and external devices.

3. Disconnect the external devices from their power sources, then from the computer.

Ensure that there is no diskette in the diskette drive and that

IMPORTANT:

there are no PC Cards in the PC slots.

4. Close the display and all exterior doors of the computer.

5. Pack the computer with sufficient packing material to protect it. Use the original packing box or similar packaging.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Diagnostic Error Codes

Diagnostic error codes occur if the system recognizes a problem while running the Compaq Diagnostic program. These error codes help identify possibly defective subassemblies.

The following tables list error codes, a description of the error condition, and the action required to resolve the error condition.

IMPORTANT:

For the removal and replacement of a particular subassembly, see

Procedures.

Select error codes by number or type:

101 through 114 Processor Test 200 through 215 Memory Test 300 through 304 Keyboard Test 401 through 403 Parallel Printer Test 600 through 699 Diskette Drive Test 1101 Serial Test 1701 through 1736 Hard Drive Test 501 through 516 Video Test

Retest the system after completing each step. If the problem has been resolved, do not proceed with the remaining steps.

Removal and Replacement

2402 through 2456 2458 through 2480 3206 Audio Test 8601 through 8602 Touch Pad Pointing Device Test 3301 through 6623 CD/DVD Test

Processor Test Error Codes Error

Code Description Recommended Action

101-xx CPU test failed Replace the processor and retest. 102-xx Coprocessor or Weitek Error 1. Run the Configuration and Diagnostics

Utilities.

2. Replace the processor board and retest. 103-xx DMA page registers test failed Replace the system board and retest. 104-xx Interrupt controller master test failed 105-xx Port 61 error 106-xx Keyboard controller self-test failed 107-xx CMOS RAM test failed 108-xx CMOS interrupt test failed 109-xx CMOS clock test failed 110-xx Programmable timer load data test

failed 113-xx Protected mode test failed 114-01 Speaker test failed 1. Check system configuration.

2. Verify cable connections to speaker.

3. Replace the system board and retest.

Memory Test Error Codes

200-xx Memory machine ID test failed 1. Flash the system ROM and retest. 202-xx Memory system ROM checksum failed 203-xx Write/Read test failed 1. Remove the memory module and retest. 204-xx Address test failed 211-xx Random pattern test failed

2. Replace the system board and retest.

2. Install a new memory module and retest.

214-xx Noise test failed 215-xx Random address test failed

Keyboard Test Error Codes

300-xx Failed ID Test 1. Check the keyboard connection. If

disconnected, turn off the computer and

301-xx Failed Selftest/Interface Test 302-xx Failed Individual Key Test 304-xx Failed Keyboard Repeat Test

Parallel Printer Test Error Codes

401-xx Printer failed or not connected 1. Connect the printer.

402-xx Failed Port Test

403-xx Printer pattern test failed

Diskette Drive Test

connect the keyboard.

2. Replace the keyboard and retest.

3. Replace the system board and retest.

2. Check power to the printer.

3. Install the loop-back connector and retest.

4. Check port and IRQ configuration.

5. Replace the system board and retest.

600-xx 601-xx Diskette format failed

602-xx Diskette read test failed 603-xx 604-xx Diskette random read test failed

605-xx Diskette ID media failed 606-xx Diskette speed test failed 609-xx Diskette reset controller test failed 610-xx Diskette change line test failed 697-xx Diskette type error 698-xx Diskette drive speed not within limits

699-xx

Diskette ID drive types test

failed

Diskette write, read, compare test

failed

Diskette drive/media ID error 1. Replace media.

1. Replace the diskette media and retest.

2. Check and/or replace the diskette power and signal cables and retest.

3. Replace the diskette drive and retest.

4. Replace the system board and retest.

2. Run the Configuration and Diagnostics Utilities.

Serial Test Error Codes

1101-xx

1701-xx Hard drive format test failed 1. Run the Configuration and Diagnostics 1702-xx Hard drive read test failed

1703-xx 1704-xx Hard drive random seek test failed

1705-xx Hard drive controller test failed 1706-xx Hard drive ready test failed 1707-xx Hard drive recalibration test failed 1708-xx Hard drive format bad track test failed 1709-xx Hard drive reset controller test failed 1710-xx Hard drive park head test failed

Serial port test failed 1. Check port configuration

2. Replace the system board and retest.

Hard Drive Test Error Codes

Utilities and verify drive type.

2. Verify that all secondary drives have

Hard drive write/read/compare test

failed

secondary drive capability.

3. Replace the hard drive and retest.

4. Replace the system board and retest.

1715-xx Hard drive head select test failed 1716-xx 1717-xx Hard drive ECC* test failed

1719-xx Hard drive power mode test failed 1724-xx Network preparation test failed 1736-xx Drive monitoring test failed * ECC = Error Correction Code

501-xx Video controller test failed The following apply to error codes 501-xx 502-xx Video memory test failed 503-xx Video attribute test failed 504-xx Video character set test failed

505-xx

Hard drive conditional format test

failed

Video Test Error Codes

Video 80 × 25 mode 9 × 14 character

cell test failed

through 516-xx:

1. Disconnect external monitor and test with internal LCD display.

2. Replace the display assembly and retest.

3. Replace the system board and retest.

506-xx 507-xx Video 40 × 25 mode test failed 508-xx

509-xx 510-xx Video 640 × 200 mode test failed

511-xx Video screen memory page test failed 512-xx Video gray scale test failed 514-xx Video white screen test failed 516-xx Video noise pattern test failed 2402-xx Video memory test failed The following steps apply to error codes 2403-xx Video attribute test failed 2404-xx Video character set test failed

2405-xx

2406-xx

Video 80 × 25 mode 8 × 8 character

cell test failed

Video 320 × 200 mode color set 0

test failed

Video 320 × 200 mode color set 1

test failed

Video 80 × 25 mode 9 × 14 character

cell test failed

Video 80 × 25 mode 8 × 8 character

cell test failed

2402-xx through 2456-xx:

1. Run the Configuration and Diagnostics Utilities.

2. Replace the display assembly and retest.

3. Replace the system board and retest.

2408-xx

2409-xx 2410-xx Video 640 × 200 mode test failed

2411-xx Video screen memory page test failed 2412-xx Video gray scale test failed 2414-xx Video white screen test failed

2416-xx Video noise pattern test failed

2418-xx ECG/VGC memory test failed

2419-xx ECG/VGC ROM checksum test failed 1. Run the Configuration and Diagnostics

2421-xx ECG/VGC 640 × 200 graphics mode

2422-xx ECG/VGC 640 × 350 16 color set test

Video 320 × 200 mode color set 0

test failed

Video 320 × 200 mode color set 1

test failed

failed

Utilities.

2. Disconnect external monitor and test with internal LCD display.

3. Replace the display assembly and retest.

4. Replace the system board and retest.

2423-xx ECG/VGC 640 × 350 64 color set test

failed 2424-xx ECG/VGC monochrome text mode test

failed 2425-xx ECG/VGC monochrome graphics mode

test failed 2431-xx 640 × 480 graphics test failure

2432-xx 320 × 200 graphics (256 color mode)

test failure 2448-xx Advanced VGA Controller test failed

2451-xx 132-column Advanced VGA test failed

2456-xx Advanced VGA 256 Color

test failed 2458-xx Advanced VGA BitBLT test The following step applies to error codes

2458-xx through 2480-xx:

2468-xx Advanced VGA DAC test

2477-xx Advanced VGA data path test

2478-xx Advanced VGA BitBLT test

2480-xx Advanced VGA LineDraw test

Audio Test Error Codes

3206-xx Audio System Internal Error Replace the system board and retest.

TouchPad/Pointing Device Interface Test Error Codes

Replace the system board and retest.

8601-xx Mouse test failed 1. Replace the TouchPad and retest.

2. Replace the system board and retest.

8602-xx Interface test failed

CD/DVD Drive Test Error Codes

3301-xx CD/DVD drive read test failed 1. Replace the CD/DVD and retest.

2. Verify that the speakers are connected.

3305-xx CD/DVD drive seek test failed

6600-xx ID test failed

6605-xx Read test failed

6608-xx Controller test failed

3. Verify that drivers are loaded and properly installed.

4. Replace the CD/DVD drive and retest.

5. Replace the system board and retest.

6623-xx Random read test failed

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

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/DVD 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.

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 file. Verify that all required changes have been made to the file. Verify that all printer drivers have been installed for each application.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

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.

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.

Some common causes and solutions for battery pack problems are listed in the following table. The "Solving Power Problems" section in this chapter may also be applicable.

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.

Computer is beeping and battery LED icon is blinking.

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.

Battery charge is low. Immediately save any open file(s). Then

do any 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.

Computer battery LED icon (front on the unit) blinks to indicate low battery condition, but computer does not beep.

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

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

Problem Probable Cause Solution(s)

Battery charge does not last as long as expected.

Volume is turned down too low. Adjust the volume.

Battery pack is already charged. No action is necessary.

Battery pack was exposed to temperature extremes.

Battery pack is at end of its life. Replace battery pack. RTC battery is dead. Replace the RTC battery.

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

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

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.

Battery pack is warm to the touch after charging.

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

Battery has partially self-discharged. Recharge the battery. Discharge the

battery completely and then recharge it.

Power management is disabled. Set a power management level in

Computer Setup.

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.

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

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

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.

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

Solving CD/DVD Drive Problems

Problem Probable Cause Solution(s)

CD/DVD drive cannot read a compact disc or digital versatile disc.

Compact disc or digital versatile disc is upside down or is improperly inserted in the CD/DVD drive.

CD is CD Plus or Pregap/Track 0 type. Cannot read these type CDs in 24x.

Open the CD/DVD loading tray, lay the compact disc or digital versatile disc in it (label side up), then close the tray.

Remove the CD.

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

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

Check the drive letter in the path statement.

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

Diskette drive cannot read a diskette.

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.

Cannot boot from diskette. Bootable diskette is not in

drive A.

FORMAT A: Use the type of diskette

required by the drive.

another diskette. Reformat bad floppy.

the Compaq Diagnostics diskette.

Format the diskette. At the system prompt, enter

FORMAT A: Put the bootable diskette in

drive A.

Diskette Boot has incorrect setting in Computer Setup.

Run Computer Setup and set diskette as first to boot.

This section lists some common causes and solutions for computer display and external monitor problems.

You can perform a monitor self-test on an external VGA color or monochrome monitor by disconnecting the monitor from the computer. To do so, complete the following steps:

1. Turn off the monitor.

2. Turn off the computer.

3. Disconnect the monitor signal cable from the computer.

4. Turn on the monitor and allow it to warm up for one minute.

The display should be white. A narrow black border may also appear on the left and right sides of the display. Either of these displays indicates that the monitor is working properly.

Solving Display Problems

Problem Probable Cause Solution(s)

Screen is dim. Control for brightness (if

applicable) is not set properly.

Adjust the Brightness of the display by using Fn + F7 (¯ ) or Fn + F8 (- ).

Computer screen is in direct

Tilt display or move computer.

light.

Screen is blank. Screen save was initiated by

Power Management due to

Press any key or touch the Touch Pad.

lack of user activity. Display has overheated. If computer is in direct sunlight,

move it and allow it to cool off.

Display is blank and the Suspend icon is flashing.

Internal display is blank and the screen on an external monitor

System is in Suspend mode. Press any key or touch the

Touch Pad.

Display function was switched to the external monitor.

Use Fn + F2 to switch between LCD or CRT.

displays information.

Problem Probable Cause Solution(s)

Internal display flashes or has garbled characters when computer is connected to external monitor.

The light tubes on the edge of the display panel do not light up at all and Power-On Self-Test (POST) completes when the unit is powered up.**

Using 1024 × 768 or

Restart the computer. higher resolution on external monitor and have toggled back to internal display, which supports up to 800 × 600.

Improper backlight or display cable connections

Defective inverter board. Replace the display assembly. Defective display cable. Replace the display assembly. Defective display panel. Replace the display assembly. Defective system board. Replace the system board.

Replace the display assembly.

The light tubes on the edge of the display panel do not light up at all and Power-On Self-Test (POST) does not complete when the unit is powered up.**

Backlight (brightness) cannot be adjusted with

Fn + F7 (¯ ) or Fn + F8 (- ).***

** This problem indicates that the backlight or its power circuitry has failed. Since you cannot observe the POST result on

the display panel when the backlight is not functioning, connect the unit to an external monitor before powering the unit up. If an external monitor is not available, verify that POST completes by opening and closing the display, listening for the single or double beep, and watching for the LEDs turn on at the front of the computer.

Defective system board. Replace the system board.

Improper display cable connections.

Defective inverter board. Replace the display assembly. Defective display cable. Replace the display assembly. Defective system board. Replace the system board. Defective inverter board. Replace the display assembly. Defective display cable. Replace the display assembly. Defective system board. Replace the system board.

1. Reseat the display cable to the

system board.

2. Replace the display assembly.

Problem Probable Cause Solution(s)

This display panel has a continuous pattern across it (e.g., a "jailbars" pattern), has a single color on it, or has garbled graphics across the entire panel. This failure is for patterns across the entire panel (not just on one section).

Improper display cable connections

Reseat the display cable to the following until the problem is solved:

1. System board

2. Display assembly

Defective display cable. Replace the display assembly.

Defective inverter board. Replace the display assembly.

Defective system board. Replace the system board.

To perform a "self-test" on an external VGA color monitor, complete the following steps: The screen should be

NOTE:

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

white. A narrow black border may also appear on the left and right sides of the display. Either of these displays indicates that the monitor is working properly.

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 has bad sectors or has

Hard drive does not work. Hard drive is not seated properly. Turn off and unplug the computer,

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

failed.

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

Run Computer Checkup.

remove the battery pack, and remove and then reinstall the hard drive.

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

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.

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.

Device is not seated properly. Turn off the computer and

reinsert the device.

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.

Num Lock function is not enabled.

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.

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

External numeric keypad is connected to the computer.

Disconnect the external numeric keypad from the computer.

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 Power-On SelfTest (POST) is incorrect.

Optional memory expansion card is installed incorrectly, is incompatible with

Ensure that the optional memory expansion card is installed correctly.

the computer, or is defective.

"Out of Memory" message is

System ran out of

Check the application displayed on the screen or insufficient memory error occurs during operation.

Solving Minor Problems (continued)

memory for the application.

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

documentation for memory

requirements.

Install additional memory.

Remove from memory any

TSR applications that you do

not need.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

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

Solving PC Card Problems

Problem Probable Cause Solution(s)

When turned on, the computer does not beep when a PC Card is inserted.

Card is not inserted properly.

PC Card beeps are disabled.

Speaker is turned off or volume is turned down.

PC Card drivers are not installed.

Ensure the card is inserted in the correct orientation.

Double-click the PC Card icon in the Control Panel, click the Global Settings tab, the enable PC Card sound effects.

Press volume buttons to turn the speaker on, then increase the volume.

Double click the Add New Hardware icon in the Control Panel for installation instructions.

PC Card modem, fax, or network card does not work.

Card or card driver is not supported.

Card is not fully inserted into the slot or is not inserted properly.

Telephone cord is not plugged in all the way.

Necessary drivers are not

If PC Card or drivers are not compatible with Windows, install drivers and use the PC Card in MS-DOS mode.

Contact your Compaq authorized service provider for a list of PC Cards tested successfully in Compaq PC Card platforms.

Ensure the card is inserted in the correct orientation.

Check and secure telephone connection.

Install drivers.

PC Card modem or fax card does not work.

Modem network PC Card does not work.

Memory or storage card does not work.

installed (turned on). You are trying to access the

card using the wrong COM

See COM port.

Specifications to verify

port. The card conflicts with a

serial device.

See

Specifications to verify

address.

The card is not supported. Use supported cards only.

Network driver is not installed or is

Install driver.

not set up properly. Telephone cord is not properly

connected. SRAM and flash memory cards

Verify telephone connection.

Install driver. require the memory card driver to be loaded (turned on).

Flash memory cards require the Microsoft FlashFile System to be loaded.

Hard drives on flash mass storage cards require the PC Card ATA driver to be loaded.

You are trying to access the hard drive card using the wrong drive letter.

Double-click My

Computer to verify

the drive letter

assigned to the card.

The card is not supported.

Contact your Compaq authorized service provider for a list of PC Cards tested successfully in Compaq PC Card platforms.

Also see "Solving Battery and Battery Gauge Problems" in this section.

Solving Power Problems

Problem Probable Cause Solution(s)

Computer won't turn on and

Computer is not connected to

Insert battery or connect

battery pack is not inserted.

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

a power source.

Power cords to the external power source are unplugged.

an external power source.

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

Power adapter is defective. Replace AC Adapter and

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

due to a critical low-battery condition.

Replace the battery pack

with a fully charged

battery pack 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.

If you experience problems printing, run a printer self-test. Refer to the documentation provided with your printer for instructions. If the self-test fails, it is a printer-specific problem. Also refer to the printing section of your application documentation.

Solving Printer Problems

Problem Probable Cause Solution(s) Printer will not turn on. The signal cable may not be

Ensure that the signal connected properly, or the printer is unplugged.

Printer will not print. Printer is not turned on or is

off line. The device drivers for your

application are not installed.

Printer that is set up for a network is not connected to the network.

cable is properly

connected and that the

power cord is connected to

the electrical outlet.

Turn the printer on and set

it to on line.

Refer to the printer

documentation to install

the correct printer driver.

Connect the printer to the

network.

Printer cable is too long, unshielded, or defective.

Paper tray is empty. Fill the paper tray with

Printer prints garbled information. Correct printer drivers

are not installed.

Cable is not connected properly.

Cable is defective. Replace the printer cable

Replace the cable.

paper and set the printer

to online.

Refer to the printer

documentation to install

the correct printer driver.

Ensure that the printer

signal cable is properly

connected to the

computer.

and retest.

Some common causes and solutions for Touch Pad/pointing device problems are listed in the following table.

Solving Touch Pad/Pointing Device Problems

Problem Cause Solution(s) Touch Pad or mouse does not work. Incorrect or no device driver

is installed.

The device driver is not installed in Windows.

Install the device driver and add to the AUTOEXEC.BAT file or CONFIG.SYS file.

Install the Touch Pad/mouse driver in

External mouse does not work. Mouse is not securely

connected or is connected to an incorrect external connector.

Touch Pad or mouse does not work

Mouse is not enabled. Enter MOUSE at the even though the device is enabled in Windows.

Cable not properly seated in

Windows. Ensure that the mouse is

securely connected to the appropriate external connector.

system prompt to activate the mouse device driver.

Add a line in the AUTOEXEC.BAT file to automatically activate the mouse device driver each time computer is turned on or restarted.

Reseat cable.

Cursor skips or moves abnormally when using the Touch Pad.

Touch Pad board.

Defective Touch Pad board. Replace Touch Pad board.

Defective system board. Replace system board.

Device driver is not correctly

installed in Windows.

The Touch Pad needs to be

cleaned.

Install the appropriate device driver in Windows.

Clean the Touch Pad with a cloth dampened with alcohol or an ammoniabased glass cleaner. Wipe up liquid with a dry cloth.

United States 330981-001

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

System Unit

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Pin Assignments | Battery Pack Operations

System Unit Boards Display

Assembly Mass Storage

Devices Miscellaneous

Cable Kit Cables Miscellaneous

Hardware and Plastics Kit

Miscellaneous Parts

Documentation and Software

Description Spare Part

Number

1. Status Panel 293737-001

2. Palmrest Cover 332226-001

3. Keyboards

4. Upper CPU Cover with Power Switch Connector (Top Plastics)

5. Speaker Assembly w/Cable

6. Battery Pack, Li ion

7. CPU Base Assembly Enclosure,(Bottom Plastics)

293739-001

293883-001

330936-001

331156-001

Boards

Pentuim II/233 347556-001

Modem, 56.0 Kbps Data/Fax w/o 

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

System Unit Boards Display

Assembly Mass Storage

Devices Miscellaneous

Cable Kit Cables Miscellaneous

Hardware and Plastics Kit

Miscellaneous Parts

Documentation and Software

Description Spare Part

Number

1. Heatspreader 331164-001

2. Processors

3. Audio Board 331010-001

4. LCD Interface Board TFT w/header

5. Modems

293156-001

6. Fan w/Cable 332228-001

7. Voltage Converter 331019-001

8. System Board, w/o processor

System Board, w/o processor

9. Memory Module 16-MB 32-MB 64-MB

331009-001

347731-001

293726-001 293727-001 332208-001

System Unit Boards Display

Assembly Mass Storage

Devices Miscellaneous

Cable Kit Cables Miscellaneous

Hardware and Plastics Kit

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Description Spare Part

Display Assembly w/Cable,

13.3 inch TFT

Number

331012-001

Miscellaneous Parts

Documentation and Software

Maintenance & Service Guide

Hard Drive w/Mounting Bracket, 

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Mass Storage Devices

System Unit

Presario 1800 Series

Models: 1805 and 1810

Boards Display

Assembly Mass Storage

Devices Miscellaneous

Cable Kit Cables Miscellaneous

Hardware and Plastics Kit

Miscellaneous Parts

Documentation and Software

Description Spare Part

Number

1. Diskette Drive w/Cable, 1.44 MB,

3.5 inch

2. Hard Drives

3. 24× MAX CD Drive

3. DVD Drive 347549-001

331165-001

330967-001

Maintenance & Service Guide

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Miscellaneous Cables Kit

Presario 1800 Series

Models: 1805 and 1810

System Unit Boards Display

Assembly Mass Storage

Devices Miscellaneous

Cable Kit Cables Miscellaneous

Hardware and Plastics Kit

Miscellaneous Parts

Description Quantity

1a. Cable, Diskette Drive 1

1b. Cable, Hard Drive 1

1c. Cable, CD/DVD Drive 1

1d. Cable, TouchPad SW Board 1

1e. Cable, Fax/Modem 1

Documentation and Software

United States/ French Canada 293831-001 

Asia Pacific 137256-001 

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

System Unit Boards Display

Assembly Mass Storage

Devices Miscellaneous

Cable Kit Cables

Miscellaneous Hardware and Plastics Kit

Miscellaneous Parts

Power Cords

Description Spare Part Number

Power Cord

Modem Cables

Description Spare Part Number

1. Modem

Documentation and Software

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Miscellaneous Hardware and Plastics Kit

System Unit Boards Display

Assembly

Description Quantity

Mass Storage Devices

Miscellaneous Cable Kit

Cables Miscellaneous

Hardware and Plastics Kit

Miscellaneous Parts

Documentation and Software

1. Door, Battery Pack 1 each

2. Cover, Memory Module 1 each

3. Door, PCMCIA 2 each

4. Hinge (Clutch) Cover, Left 1 each

5. Hinge (Clutch) Cover, Right 1 each

6. Rubber Foot 10 each

7. Stand Foot (plastic) 10 each

8. Hard Drive Mounting Bracket 1 each

9. Stiffener Bracket 1 each

Maintenance & Service Guide

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Miscellaneous Parts

System Unit

Presario 1800 Series

Models: 1805 and 1810

Boards Display

Assembly Mass Storage

Devices Miscellaneous

Cable Kit Cables

Miscellaneous Hardware and Plastics Kit

Miscellaneous Parts

Documentation and Software

Description Spare Part

Number

1. AC Adapter 298239-001

2. Port Replicator

Clock Battery (Not Shown)

Miscellaneous Screw Kit (Not Shown)

Logo Kit (Not Shown)

Return Kit (Not Shown)

PCMCIA Bracket (Not Shown)

293857-001

117099-001

293760-001

203727-001

293799-001

331166-001

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Documentation and Software

System Unit Boards Display

Assembly Mass Storage

Devices Miscellaneous

Cable Kit Cables

Miscellaneous Hardware and Plastics Kit

Miscellaneous Parts

Description Spare Part Number

Quick Restore CD

Quick Reference Guide QuickFind for Windows, North America, Latin America, Asia

Pacific QuickFind for Windows, Europe, Middle East, Africa

*QuickFind is updated monthly. To complete the QuickFind part number, add the suffix from the table below for the desired month. If you do not specify the 3-digit

Documentation and Software

suffix, the default is the current month in which the order is placed.

QuickFind Part Number Suffix

Suffix Month Suffix Month

-001 January -007 July

-002 February -008 August

-003 March -009 September

-004 April -010 October

-005 May -011 November

-006 June -012 December

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Electrostatic Discharge

A sudden discharge of static electricity from a finger or other conductor can destroy static-sensitive devices or microcircuitry. Often the spark is neither felt nor heard, but damage occurs. An electronic device exposed to electrostatic discharge (ESD) may not be affected at all and will work perfectly throughout a normal cycle. Although, it may function normally for a while, then degrade in the internal layers, reducing its life expectancy.

Networks built into many integrated circuits provide some protection, but in many cases, the discharge contains enough power to alter device parameters or melt silicon junctions.

Generating Static

The table shows how different activities generate static electricity and at different electrostatic voltage levels.

Typical Electrostatic Voltages

Event 10% 40% 55%

Walking across carpet 35,000 V 15,000 V 7,500 V Walking across vinyl floor 12,000 V 5,000 V 3,000 V Motions of bench worker 6,000 V 800 V 400 V Removing DIPS from plastic tubes 2,000 V 700 V 400 V Removing DIPS from vinyl trays 11,500 V 4,000 V 2,000 V Removing DIPS from Styrofoam 14,500 V 5,000 V 3,500 V Removing bubble pack from PCBs 26,000 V 20,000 V 7,000 V Packing PCBs in foam-lined box 21,000 V 11,000 V 5,000 V NOTE: 700 volts can degrade a

product.

Relative Humidity

Return to Removal & Replacement Procedures

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Listed below are some of the considerations that you should keep in mind during the disassembly and assembly of the computer.

To service the computer, you need the following:

Compaq screwdriver kit (Spare Part No. 161946-001) Torx T-9 screwdriver 5mm nut drivers (for screwlocks and standoffs) Small, standard screwdriver Small, Phillips screwdriver Plastic shroud Diagnostics software

The screws used in the computer are not interchangeable. If an incorrect screw is used during the reassembly process, it can damage the unit. Compaq strongly recommends that all screws removed during disassembly be kept with the part that was removed, then returned to their proper locations.

IMPORTANT:

placed away from the work area to prevent damage.

Return to Removal & Replacement Procedures

As each subassembly is removed from the computer, it should be

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Most cables used throughout the unit are ribbon cables. Cables must be handled with extreme care to avoid damage. Apply only the tension required to seat or unseat the cables during insertion or removal from the connector. Handle cables by the connector whenever possible. In all cases, avoid bending, twisting, or tearing the cables, and ensure that the cables are routed in such a way that they cannot be caught or snagged by parts being removed or replaced.

Use the following precautions when handling cables to avoid damage to the cable or computer:

Always handle cables by their connectors. Avoid bending, twisting, or pulling on the cables. Apply minimum required force when seating or unseating the cables from their

connectors.

Place the cables in such a manner that they cannot be caught or snagged by parts being

removed or replaced.

Handle flex cables with extreme care; they can tear easily.

CAUTION: When serving these computers, ensure that cables are placed in their proper location during the reassembly process. Improper cable placement can cause severe damage to the unit.

Removing a Cable from a ZIF Connector.

The ribbon cable position for the

3.2-GB, 4.0-GB, and 6.4-GB hard drive.

CD or DVD drive.

diskette drive.

The cable position for the

speaker assembly.

Plastic parts can be damaged by the use of excessive force during disassembly and reassembly. When handling the plastic parts, use care. Apply pressure only at the points designated in the maintenance instructions.

Return to Removal & Replacement Procedures

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

The computer uses a zero insertion force (ZIF) connector for the keyboard cable to the system board. To remove a cable from a ZIF connector, lift both corners of the ZIF connector and slide simultaneously with constant light force.

Back to

CAUTION: A ZIF connector and its attached cable can be easily damaged. Handle only the connector slide when removing or replacing a cable. Never pull or twist on the cable while it is connected.

CAUTION: When servicing this computer, ensure that cables are placed in their proper location during the reassembly process. Improper cable placement can damage the computer.

Cables and Connectors.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

The ribbon cable position for the 3.2-GB, 4.0-GB, or

6.4-GB hard drive.

Back to Cables and Connectors.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

The ribbon cable position for the CD drive.

Back to Cables and Connectors.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

The ribbon cable position for the diskette drive.

Back to Cables and Connectors.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

The cable position for the speaker assembly.

Back to Cables and Connectors.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Preparing the Computer for Disassembly

Electrostatic Discharge

Service Considerations

Cables and Connectors

Preparing the Computer for Disassembly

Battery Pack Palmrest

Cover with Touch Pad

Keyboard

Before beginning removal and replacement procedures, complete the following procedures:

1. Disconnect AC power and any external devices.

2. Remove the battery pack.

3. Remove any PC Cards.

The battery pack should be removed before

IMPORTANT:

performing any internal maintenance on the computer.

WARNING: Metal objects can damage the battery pack

Heatspreader Modem Processor Status Panel Interface

Board Hard Drives Battery

Charger Board CD or DVD

Drive Display Panel

Assembly

as well as the battery contacts in the battery compartment. To prevent damage, do not allow metal objects to touch the battery contacts. Place only the battery pack for the Compaq Presario 1800 Series Portable Computers into the battery compartment. Do not force the battery pack into the bay if insertion does not occur easily.

CAUTION: Do not crush, puncture, or incinerate the

battery pack. 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.

Upper CPU Cover

Speaker Assembly

Diskette Drive Fan Assembly Audio Board System Board Memory

Module

NOTE:

The Compaq Presario 1800 Series Portable Computers have several screws of various sizes which are not interchangeable. Care must be taken during reassembly to ensure that the correct screws are used in their correct location. During removal please keep respective screws with their associate sub-assembly.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Removing the Keyboard

Electrostatic Discharge

Service Considerations

Cables and Connectors

Preparing the Computer for Disassembly

Battery Pack Palmrest

Cover with Touch Pad

Keyboard Heatspreader Modem

To remove the keyboard, complete the following steps:

Prepare the

computer for disassembly.

2. Remove the

palmrest cover with touch pad.

3. Gently lift up the front of the keyboard and disconnect the flex cable from the ZIF connector on the system board.

Processor Status Panel Interface

Board Hard Drives Battery

Charger Board CD or DVD

Drive Display Panel

Assembly Upper CPU

Cover

NOTE:

To remove a cable from a ZIF connector, lift both corners of the ZIF connector and slide simultaneously with constant light force. Then remove the cable. Refer to the section on

Speaker Assembly

Diskette Drive Fan Assembly Audio Board System Board Memory

Module

Cables and Connectors for

more information on removing a cable from the ZIF connector.

Next Step

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Removing the Heatspreader

Electrostatic Discharge

Service Considerations

Cables and Connectors

Preparing the Computer for Disassembly

Battery Pack Palmrest

Cover with Touch Pad

Keyboard

To remove the heatspreader, complete the following steps:

Prepare

the computer for disassembly.

2. Remove the palmrest

cover with touch pad.

Heatspreader Modem Processor Status Panel Interface

Board Hard Drives Battery

Charger Board CD or DVD

Drive Display Panel

Assembly Upper CPU

3. Remove the keyboard.

4. Remove three screws from the heatspreader and lift out of the chassis.

To replace the heatspeader, reverse the previous procedures.

Cover Speaker

Assembly Diskette Drive Fan Assembly Audio Board System Board Memory

Module

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Removing the Modem

Electrostatic Discharge

Service Considerations

Cables and Connectors

Preparing the Computer for Disassembly

Battery Pack Palmrest

Cover with Touch Pad

Keyboard

To remove the modem and shield, complete the following steps:

1. Prepare

computer

the

for disassembly.

2. Remove

the palmrest

cover with touch pad.

Heatspreader Modem Processor Status Panel Interface

Board Hard Drives Battery

Charger Board CD or DVD

Drive Display Panel

Assembly Upper CPU

Cover Speaker

3. Remove

the keyboard.

4. Remove

the

heatspreader.

5. Remove

two screws securing the shield and modem, lift off the shield, and pull the modem off the connector on the system board.

Assembly Diskette Drive Fan Assembly Audio Board System Board Memory

Module

Next Step

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

6. Disconnect the modem cable from the modem.

To replace the modem, reverse the previous procedures.

Return to Removal & Replacement Procedures

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Removing the Processor

Electrostatic Discharge

Service Considerations

Cables and Connectors

Preparing the Computer for Disassembly

Battery Pack Palmrest

Cover with Touch Pad

Keyboard

To remove the processor, complete the following steps:

Prepare

the computer for disassembly.

2. Remove the palmrest

cover with touch pad.

Heatspreader Modem Processor Status Panel Interface

Board Hard Drives Battery

Charger Board CD or DVD

Drive Display Panel

Assembly Upper CPU

3. Remove the keyboard.

4. Remove the

heatspreader.

5. Remove the modem.

6. Remove two screws securing the processor bracket.

Next Step

Cover Speaker

Assembly Diskette Drive Fan Assembly Audio Board System Board Memory

Module

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

7. Insert a small blade screw driver under the right side on the processor and lift the processor from the chassis slot.

8. Lift the processor out of the processor chassis slot.

To replace the processor complete the following steps:

1. Insert the processor into the chassis slot on the system board and push down into the slot.

2. Replace the processor bracket.

Return to Removal & Replacement Procedures

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Removing the Status Panel

Electrostatic Discharge

Service Considerations

Cables and Connectors

Preparing the Computer for Disassembly

Battery Pack Palmrest

Cover with Touch Pad

Keyboard

To remove the status panel, complete the following steps:

Prepare

the computer for disassembly.

2. Remove

the palmrest

cover with touch pad.

Heatspreader Modem Processor Status Panel Interface

Board Hard Drives Battery

Charger Board CD or DVD

Drive Display Panel

Assembly Upper CPU

Cover Speaker

3. Remove

the

keyboard.

4. Move the

lever (located below the CD Play button on the status panel) to the right to release the status panel cover.

5. Support

the front bottom corners of

Assembly Diskette Drive Fan Assembly Audio Board System Board Memory

Module

the status panel with the thumb and forefinger. Lift up the status panel off the chassis.

Next Step

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Interface Board with Header

Electrostatic Discharge

Service Considerations

Cables and Connectors

Preparing the Computer for Disassembly

Battery Pack Palmrest

Cover with Touch Pad

To remove the interface board with header, complete the following steps:

1. Prepare

the computer for disassembly.

2. Remove

the palmrest cover with

Keyboard Heatspreader Modem Processor Status Panel Interface

Board Hard Drives Battery

Charger Board CD or DVD

Drive

touch pad.

3. Remove

the keyboard.

4. Remove

the status panel.

5. Remove

the two screws from the interface board.

Display Panel Assembly

Upper CPU Cover

Speaker Assembly

Diskette Drive Fan Assembly

Audio Board

System Board Memory

Module

Next Step

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

6. Slightly lift the interface board, disconnect the ZIF connector, and backlight power cable from the interface board.

Next Step

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

7. Lift the interface board up with the header attached from the system board. .

When removing the interface board with the header attached occassionally the header will remain attached to the system

IMPORTANT:

board. If this occurs when removing the interface board with the header attached, separate the header from the connector on the system board.

To replace the interface board, reverse the previous procedures.

When replacing interface board, ensure both

NOTE:

connectors on the board are properly seated.

Next Step

The following illustration and table indicates the locations of the connectors on the interface board.

Interface Board Components

Designator Connector

1. JP1 Backlight Switch

2. JP3 Display Interface ZIF

3. JP4 Inverter/Backlight LIF Connector

4. None Interface Header

Return to Removal & Replacement Procedures

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Removing the 3.2-GB, 4.0-GB, or 6.4-GB Hard Drive

Electrostatic Discharge

Service Considerations

Cables and Connectors

Preparing the Computer for Disassembly

Battery Pack Palmrest

Cover with Touch Pad

To remove the hard drive with the hard drive bracket attached, complete the following steps:

1. Prepare the

computer for disassembly.

Keyboard Heatspreader Modem Processor Status Panel Interface

Board Hard Drives Battery

Charger Board CD or DVD

Drive Display Panel

2. Remove the palmrest

cover with touch pad.

3. Remove four screws from the hard drive mounting bracket and lift up the hard drive.

Next Step

Assembly Upper CPU

Cover Speaker

Assembly Diskette Drive Fan Assembly Audio Board System Board Memory

Module

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

5. Disconnect the hard drive data cable from the hard drive and remove from the chassis.

Next Step

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

To remove the hard drive mounting bracket, complete the following step:

Remove four screws from the hard drive mounting bracket.

To replace the hard drive and hard drive mounting

bracket, reverse the

previous procedures.

Return to Removal & Replacement Procedures

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Removing the Battery Charger Board

To remove the battery charger board, complete the following

Electrostatic Discharge

Service Considerations

Cables and Connectors

Preparing the Computer for Disassembly

Battery Pack Palmrest

Cover with

steps:

1. Prepare the

computer for disassembly.

2. Remove the

palmrest cover with touch pad.

3. Remove the

keyboard.

4. Remove the

hard drive.

Touch Pad Keyboard Heatspreader Modem Processor Status Panel Interface

Board Hard Drives Battery

Charger Board CD or DVD

Drive Display Panel

Assembly

5. Remove the

stiffener bracket.

6. Remove screw from the battery charger board, unplug the board from the connector on the system board, and lift out of the chassis.

To replace the battery charger board, reverse

Upper CPU Cover

Speaker Assembly

Diskette Drive Fan Assembly Audio Board System Board Memory

Module

the previous procedures.

When replacing the battery charger board, ensure

NOTE:

the pins are aligned with the connector on the system board.

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Removing the CD or DVD Drive

Electrostatic Discharge

Service Considerations

Cables and Connectors

Preparing the Computer for Disassembly

Battery Pack Palmrest

Cover with Touch Pad

Keyboard

To remove the CD or DVD drive, complete the following steps:

1. Prepare

computer

the

for disassembly.

2. Remove

the palmrest

cover with touch pad.

Heatspreader Modem Processor Status Panel Interface

Board Hard Drives Battery

Charger Board CD or DVD

Drive Display Panel

Assembly

3. Remove

the keyboard.

4 Remove the

heatspreader.

4. Remove

the hard

drive.

5. Remove

the stiffener

bracket.

Upper CPU Cover

Speaker Assembly

Diskette Drive Fan Assembly Audio Board System Board Memory

Module

6. Remove

the battery

charger board.

7. Remove

two screws located at the back CD or DVD drive.

Next Step

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

8. Disconnect the CD or DVD drive cable from the system board.

To replace the CD or DVD drive, reverse the previous procedures.

Return to Removal & Replacement Procedures

Maintenance & Service Guide

Presario 1800 Series

Models: 1805 and 1810

Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications

Pin Assignments | Battery Pack Operations

Removing the Display Panel Assembly

Electrostatic Discharge

Service Considerations

Cables and Connectors

Preparing the Computer for Disassembly

Battery Pack Palmrest

Cover with Touch Pad

Keyboard

To remove the display panel assembly, complete the following steps:

Prepare the

computer for disassembly.

2. Remove the

palmrest cover with touch pad.

3. Remove the

keyboard.

Heatspreader Modem Processor Status Panel Interface

Board Hard Drives Battery

Charger Board CD or DVD

Drive Display Panel

Assembly Upper CPU

4. Remove the

heatspreader.

5. Remove the status

panel.

6. Remove the

interface board.

7. Grasp the hinge

covers, pull out and lift the covers off the chassis.

Carefully remove the

Cover Speaker

Assembly Diskette Drive Fan Assembly Audio Board System Board Memory

Module

IMPORTANT:

display panel assembly hinge covers.

Next Step

Compaq 1805 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual