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500-277c bios power on password

Microsoft Windows 8.1 (64-bit)

I have a 500-277c Desktop with the error message Enter Power-on password. I have tried everything on the web; changing the jumpers and leaving the battery out for a long period of time. Please help. Thank you. Tim

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HP Recommended

500-277c bios power on password


Sometimes, when you enter a wrong password 3 times your laptop will display a hash code, with this hash code it may be possible to generate a bios master password for your machine.

HP have prepared rather lengthy documents,
and there are videos to watch, to cover, seemingly, all BIOS eventualities.

BIOS Problems LAPtops.

BIOS Problems DESKtops.

BIOS CheckSum error

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