HP 1900-XL160, 1900-XL162, 1900-XL165 manual Clearing Power-on Password

Page 75

Maintenance & Service Guide

Presario 1900 Series

Models: XL1, XL160, XL161, XL162, XL163, and XL165

Before You Begin

 

Specifications

 

Parts Catalog

 

 

 

 

 

Removal Sequence

 

Troubleshooting

 

Battery Operations

 

 

 

 

 

 

 

 

 

 

Product Description

 

Pin Assignments

 

Index

 

 

 

 

 

Troubleshooting

Clearing the

Power-on

Password

If the password is not known, clear it by performing the following steps:

1. Turn off the computer.

2. Disconnect the power cord.

3.

4.

5.

Remove the battery pack .

Remove the keyboard.

Disconnect the backlight cable from the connector on the system board .

6.Simultaneously make contact with the two pads located at R37 on the system boarding using a conductive piece of material (piece of wire or tool) or remove the RTC battery for 10 seconds, clearing the password.

7.Reassemble the computer.

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

Image 75
Contents Battery Operations IndexPin Assignments Before You Begin Table Of ContentsMaintenance & Service Guide Preface SymbolsSpecifications Specifications Devices System TimerSystem DMA System I/O Address System Memory CatalogDisplay Information TFT Display Hard DrivesCD ROM Drive DVD Drive Illustrated Parts Catalog Before You Begin Specifications Parts CatalogSystem Unit Illustrated Parts CatalogSystem Unit Boards Illustrated Parts CatalogSystem Unit Display Panel Assembly Documentation Software Mass Storage DevicesMiscellaneous Hardware Plastics Kit System Unit Documentation and Software Description Spare Part NumberQuickFind Part Number Suffix CD- ROM Product Description Model Compaq Discovery 1900 Series Portable ComputerModel XL160 XL161 Model XL162 XL163 & NewModels Features Models Features Controls Lights Models Features Controls Lights Status Panel Right Side Components Bottom Unit Left Side Top Wedge Components Right Side Wedge Components Product Description Port Replicator Connectors Components Power Management RearProduct Description Integrated 10/100BaseT Ethernet Port Replicator ConnectorsPort Replicator Components Full Off Main Power Off Mode Power Management SettingsHibernation Mode Rebooting After a LockupExternal VGA Monitor Connector Parallel ConnectorSerial Connector Keyboard/Mouse ConnectorSerial Number Removal and Replacement ProceduresElectrostatic Discharge Generating StaticTypical Electrostatic Voltages Removal and Replcement Procedures Plastic Parts Cables and ConnectorsCables Select the desired illustrationRemoving a Cable from Zif Connector Remove the wedge Preparing the Computer for DisassemblyElectrostatic Remove any PC CardsTo remove the battery pack, complete the following steps Removing the Battery PackRemoving Hard Drive Removal and Replacement ProceduresRemoving the Keyboard Return to Removal Replacement Procedures Removing the Memory Module Removing the Modem Removal and Replacement Procedures Removing the Heatspreader with Thermal Pad Removal and Replacement Procedures Remove the larger half of the heatspreader Free Removing the ProcessorWhich can be easily damaged, if not properly removed Prepare the computer for disassembly Remove the keyboard Removing Inch Display Panel AssemblyRemoving the 13.3 inch Display Panel Assembly Removal and Replacement Procedures Removal and Replacement Procedures Next Step Return to Removal Replacement Procedures Removing the Upper CPU Cover with Palmrest and TouchPad Remove two screws on the rear of the unit Replacement Procedures Removing the Hard Drive/Battery Charger Board Removing Converter Board Fan Assembly System Board Speaker DVD or CD Drive System Board Speaker Assembly DVD or CD Drive Removing the Fan AssemblyRemoving the System Board Speaker Assembly DVD or CD DriveNext Step Removing Display Panel Assembly Hinge Bracket Illustration not shown but is forthcoming DVD or CD Drive Removing the DVD or CD- ROM Drive Prepare the computer for disassembly Disassemble the wedgeRemoving the DVD or CD-ROM Drive Troubleshooting Preliminary Steps Run Compaq diagnosticsRunning Post Power-On Self-Test MessagesClearing Power-on Password System Memory Compaq DiagnosticsComputer Checkup Test View System Information InspectShipping Preparation Contacting Compaq SupportProcessor Test Error Codes Diagnostic Error CodesBefore Replacing Parts Troubleshooting Without DiagnosticsSolving Power Problems Solving PC Card ProblemsSolving CD/DVD Drive Problems Solving Minor ProblemsSolving Audio Problems Solving Battery Pack and Battery Gauge ProblemsMinimizing the Energy Required Increasing Battery Pack Operating TimeConditioning a Battery Pack Disposing of a Used Battery Pack
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