Compaq 305 specifications Clearing the Power-on Password

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Presario 305 Model

Before You Begin		Specifications		Parts Catalog


Removal Sequence		Troubleshooting		Battery Operations

				Index
Product Description		Pin Assignments		Index

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 removing the RTC battery (located on the system board) as follows:

1. Turn off the computer.

2. Disconnect the AC

Adapter.

3. Remove the Multi- media Expansion Unit.

4. Remove the battery pack.

5. Disconnect and remove the RTC battery.

6. Wait for five minutes.

7. Reconnect the RTC battery.

8. Reconnect the AC Adapter. Do not reinstall the battery pack yet.

9. Turn on the computer to verify that the power-on password has been cleared. If it has not been cleared, repeat all steps above.

Remember to set the date and

Note: time the next time the

computer is turned on.

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Contents Index Before You BeginMaintenance and Service Guide Preface SymbolsProduct Description Models and Features Models and FeaturesUpper Unit Components Upper Unit ComponentsFront Components Front ComponentsLeft Side Components Left Side ComponentsRight Side Components Right Side ComponentsBottom Unit Bottom of UnitRear Connectors Rear ConnectorsMulti- media Expansion Unit Multi-media Expansion BasePower Management Settings Power Management for WindowsBattery Pack Removing the Battery PackBack to step Multi-media Expansion Unit Removing the Multi-media Expansion unitSerial Number Location Serial Number LocationPreparing for Disassembly Preparing for DisassemblyRelative Humidity Event 10% 40% 55% Removal and Replacement ProceduresGenerating Static Removal Sequence Tool and Software Requirements Plastic Parts Cables and ConnectorsZIF Connectors Display Panel Cable Location Inverter Cable Location Audio Cable Location Touchpad Cable Location Fan Cable Location Light Board Cable Location Speaker Cable Location Battery Cable Location Hard Drive Removing the Hard DriveTo replace the hard drive, reverse the removal procedures Modem Card Removing the Modem CardRemoving the Modem Card RTC Battery Removing the RTC BatteryKeyboard Removing the KeyboardZIF connector Memory Board Removing the Memory BoardSwitch Cover Removing the Switch CoverPosition the computer so the front faces forward Display Panel Removing the Display PanelTo replace display panel, reverse the removal procedures Deck Removing the DeckRemove seven screws T8 from the underside of the unit Insertion Force Connector Back to step Voltage Converter Board Removing the Voltage Converter BoardBack to step Modem Connector Board Removing the Modem Connector BoardPC Card Removing the PC CardPC Card Assembly Removing the PC Card AssemblySystem Board Removing the System BoardBefore You Begin Specifications Back to step Troubleshooting Preliminary Steps Use AC power when running POST, ComputerRunning Post Power-On Self Test PostClearing the Power-on Password View System Information Inspect Compaq DiagnosticsComputer Setup Computer Checkup TestShipping Preparation Contacting Compaq SupportProcedures Diagnostic Error CodesDiagnostic Error Codes USB Troubleshooting Without DiagnosticsProbable Cause Solving Minor ProblemsProblem Display Problems Problem Cause Solutions Global Settings tab, the enableInfrared Problems Battery Pack Operating Time Connector Pin Signal Connector Pin AssignmentsIllustrated Parts Catalog System Components Description Part Number System UnitExternal Cables Description Part Miscellaneous Plastics KitScrew Kit Description Miscellaneous PartsSuffix Month Documentation and SoftwarePhysical and Environmental SpecificationsSystem I/O Address Diskette Drive