HP 1230 manual Clearing the Power-on Password

Page 21

Maintenance & Service Guide

Presario 1200 Series

Models: 1230 and 1232

Home Page Notice Preface Product Description Troubleshooting 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. The RTC battery is located on the system board.

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 Palmrest Cover with Touch Pad.

5. Remove the heatspreader.

6. Remove the keyboard.

7. The dip switch contains four bits. Set the third bit to ON for 30 seconds and return it to OFF position.

8. Reassemble the computer.

9. Turn on the computer to verify that the power-on password has been cleared. If it has not been cleared, repeat Steps 1 through 10.

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Contents Maintenance & Service Guide Maintenance & Service Guide Preface SymbolsCompaq Presario Product DescriptionFollow the Preliminary Steps Run the Power-OnSelf-Test Post TroubleshootingIllustrated Parts Catalog Serial Number Location Removal and Replacement ProceduresSpecifications Connector Pin Assignments Battery Pack Operating Time Models and Features ProcessorHard Drive Front of Unit Controls and LightsLeft Side Components Right Side Components Bottom of Unit Rear Connectors Power Management for Windows Operations Run Computer Checkup Preliminary StepsRunning Post Power-On Self Test PostClearing the Power-on Password Compaq Diagnostics Computer Checkup TestView System Information Inspect Shipping Preparation Contacting Compaq SupportProcedures Diagnostic Error CodesBefore Replacing Parts Troubleshooting Without DiagnosticsSolving Minor Problems Solving Power Problems Solving PC Card ProblemsSolving Printer Problems Solving Touch Pad/Pointing Device ProblemsDescription Spare Part Number System UnitDescription Spare Part Number BoardsHPA Mass Storage Devices Miscellaneous Cables Kit Miscellaneous Cables Kit Spare Part Number 330946-001Description Quantity Modem Cables Spare Part Number DescriptionMiscellaneous Hardware and Plastics Kit Spare Part Number Miscellaneous Hardware and Plastics KitDescription Spare Part Number Miscellaneous PartsQuickFind Part Number Suffix Month Documentation and SoftwareGenerating Static Electrostatic DischargeService Considerations Cables Cables and ConnectorsSelect the desired illustration Plastic PartsZIF Connectors Ribbon cable position for the 2.1-GB or 3.2 hard Drive Ribbon cable position for the CD drive Ribbon cable position for the diskette drive Back to Cables and Connectors Preparing the Computer for Disassembly Removing the Battery Pack Return to Removal Replacement Procedures Removing the Palmrest Cover with Touch Pad Prepare the computer for disassemblyMaintenance & Service Guide Removing the Heatspreader Removing the Keyboard Return to Removal Replacement Procedures Removing the Processor To replace the processor complete the following steps Removing the 3.2-GB or 2.1-GB Hard Drives Maintenance & Service Guide Reverse the previous procedures Removing the CD Drive Maintenance & Service Guide Presario 1200 Series Models 1230 Return to Removal Replacement Procedures Removing the Battery Charger Board Removing the Modem To replace the modem, reverse the previous procedures Removing the Display Panel Assembly Maintenance & Service Guide Maintenance & Service Guide Maintenance & Service Guide Return to Removal Replacement Procedures Removing the Upper CPU Cover Removing the Speaker Assembly Removing the Diskette Drive Return to Removal Replacement Procedures Removing the Fan Assembly Maintenance & Service Guide Removing the System Board Remove three standoffs from the system board Maintenance & Service Guide Remove three screws from the system board Return to Removal & Replacement Procedures Removing the Memory Module Return to Removal Replacement Procedures
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