Compaq 1800T, 1825 specifications Preliminary Steps, Run Computer Checkup

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Maintenance & Service Guide

Presario 1800 Series

Models: 1825 and 1800T

Home Page Notice Preface Product Description Troubleshooting 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, IMPORTANT: the problem may be related to the external 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.

Return to Troubleshooting

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Contents Page Page Preface SymbolsProduct Description Follow the Preliminary Steps TroubleshootingIllustrated Parts Catalog Removal Sequence Removal and Replacement ProceduresSerial Number Location Specifications Connector Pin Assignments Disposing of a Used Battery Pack Battery Pack OperationsIncreasing Battery Pack Operating Time Conditioning a Battery PackModem Kbps Data/Fax with PCI Networking Models and FeaturesModels and Features Hard Drive CD or DVD DriveIntegrated Speakers Controls and LightsControls Lights Internet Zone Buttons Lights Internet Zone Buttons LightsFront Bezel Components Front Bezel ComponentsLeft Side Components Left Side Components with Diskette DriveLeft Side Components with LS120 Drive Right Side Components Right Side ComponentsBottom Unit Bottom of UnitBack Connectors Back ConnectorsPort Replicator Components Port Replicator ComponentsPort Replicator Connectors Port Replicator Back ConnectorsPower Management for Windows Run Computer Checkup Preliminary StepsClearing the Power-on Password Running Post Power-On Self Test PostComputer Checkup Test Compaq DiagnosticsShipping Preparation Contacting Compaq SupportDiagnostic Error Codes Before Replacing Parts Troubleshooting Without DiagnosticsSolving Minor Problems Solving TouchPad/Pointing Device Problems Solving PC Card ProblemsSolving Power Problems Solving Printer ProblemsSystem Unit System UnitDescription Part Number BoardsBoards Boards Display Assembly Display AssemblyDescription Spare Part Number Mass Storage DevicesMass Storage Devices Description Quantity Miscellaneous Cables KitMiscellaneous Cables Kit Miscellaneous Hardware Kit Miscellaneous Hardware KitMiscellaneous Plastics Kit Miscellaneous Plastics KitMiscellaneous Parts Miscellaneous PartsDocumentation and Software Documentation and SoftwareGenerating Static Electrostatic DischargeReturn to Removal & Replacement Procedures Service ConsiderationsPlastic Parts Cables and ConnectorsCables Select the desired illustrationBack to Cables and Connectors Ribbon cable position for the hard drive Ribbon cable position for the DVD or CD drive Ribbon cable position for the diskette drive Ribbon cable position for the LS120 drive Back to Cables and Connectors Cable position for the modem Cable position for the Network Interface Card Ribbon cable position for the keyboard Preparing the Computer for Disassembly Removing the Battery Pack Removal & Replacement ProceduresPalmrest Cover with TouchPad Removing the Palmrest Cover with TouchPadRemoving Palmrest Cover with TouchPad Removal & Replacement Procedures Keyboard Removing the KeyboardStatus Panel Removing Status Panel AssemblyRemoving the Status Panel Assembly Removal & Replacement Procedures Return to Removal Replacement Procedures Removing Internet Button Board Removal & Replacement Procedures Removing the Heatspreader Removing the Network Interface Card Removing the Modem Removing Hard Drive Removing the Hard Drive Mounting Brackets DisqPlay Module Removing the DisqPlay ModuleRemoving the Processor Replacing the Processor DVD or CD Drive Removing the DVD or CD DriveRemoval & Replacement Procedures Return to Removal Replacement Procedures Remove the status panel assembly Removing Display Panel AssemblyRemoving the Display Panel Assembly Return to Removal & Replacement Procedures Upper CPU Cover Removing Upper CPU CoverFan Assembly Removing Fan AssemblyRemoving the Fan Assembly Removing the Diskette or LS120 Drive Return to Removal & Replacement Procedures Removing Battery Charger Board Remove the Upper CPU cover Removing the Speaker AssemblyRemoval Removing the System BoardRemove ten standoffs from the system board Removal & Replacement Procedures Remove four screws from the system board Before replacing Removing Memory Module Memory ModuleRemoving the Memory Module

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