I see this has been posted a long time back. I had the same problem with a friend of mine's HP nx8220. He forgot the BIOS password. What I did is I removed the AC adapter, removed the laptop battery, removed the RTC battery, hold the power button for 2 minutes, leave it for about an hour and hold the power button for 2 minutes again. Reason being is your motherboard still has reserved power. So you need to drain all the power out of that laptop. Worked perfectly after that. And of course, insert RTC battery and laptop battery.
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If you forget the power-on password, the computer must be reset at an HP-certified repair center. Please contact HP to schedule a repair. The Drive Lock password cannot be reset. If you lose or forget the Drive Lock password, the hard drive must be replaced. Please contact HP to order a new hard drive. These services are not covered by the warranty.
Removing the RTC battery and leaving it uninstalled for 5 or more minutes causes all passwords and CMOS settings to be cleared. BIOS
password can be removed by temporarily disconnecting/ removing the RTC/
CMOS (Coin-cell) battery from the motherboard. Disconnect the coin-cell battery from the system board and it will reset the BIOS to its default setting and the password would be gone. Please Refer to Page 77 of the REPAIR MANUAL HP 6720S. If you can't do it yourself, you may seek help from local laptop service professional.
GoodLuck! Dont forget to appreciate the solution if I could have been of any help! CreativeTECH
need to reset bios password. download a bios password eraser, or see if there is a reset under one of the panels on bottom of pc. usually not but i have seen them. you can pull the onboard battery for a day but usually cant get to it. best bet is check who makes your bios and get a bootable cracker
The Power on Password is set from the BIOS configuration. Ask that person who borrowed your Compaq for the password. Once you have this password, you can enter the BIOS configuration and remove/disable this password.
Depending how old you Compaq is, removing the BIOS battery and main battery for 15+ mins may remove this password and restore the BIOS to the factory default (insert both batteries again) and configure the BIOS Date and Time etc.
BUT if the the password is stored on an EEPROM chip then removing will not fix this problem. There are no backdoor passwords available.
Are you wanting to clear thr BIOS password? IF so the only way to do it on a laptop is to pull the CMOS battery out. Then boot the computer up to BIOS and it should be cleared, then just reinstall the battery.