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 an example of one used; your board may differ slightly--see Note below.

CMOS jumper location

1 Complete the preparation for disassembly. 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 links to see alternative boards for  other models or 5070, 5184, and 5185 models. 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.