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Maintenance and Service Guide Compaq Presario 4900, 5000, & 5100 Series Computers
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Removal & Replacement | Jumper & Switch Information | Specifications
Clearing CMOS
Power-On Self Test (POST)
Configuration
Diagnostic error codes
Troubleshooting without diagnostics
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| TROUBLESHOOTING Clearing CMOS If the power-on password is unknown, clearing CMOS will disable the password and allow the computer to be operated. The board shown is one used for the 5000/5100 Series computers. If you have a 4900 Series computer, click the link for the correct board and CMOS location.
CMOS jumper location |
1 | Complete the preparation for disassembly procedures.
2 | Remove the hood.
3 | Remove the fax/modem board.
4 | Open the system board bracket.
NOTE: | If your board is different from the one shown, click here to see two alternative boards used on 5000/5100 Series computers.
5 | To disable the password, move the jumper (J22) from pins 1-2 to pins 2-3 for 10 seconds, then return to pins 1-2.
6 | Replace the system board bracket and perform the desired troubleshooting.
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