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HP Compaq 8200 elite won't boot up keyboard will not work

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HP Compaq 8200 elite
Microsoft Windows 10 (64-bit)

INACCESSIBLE BOOT DEVICE Computer won't boot from disk - can't enter bios

keyboard will not work
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Did you recently do a BIOS update?

Or, did you recently enter BIOS SETUP, and change some values, or did you click "load BIOS defaults" ?


can't enter bios

If you disconnect the "power" and "data" cables from the disk-drive, and then try to power-on your computer, can you now enter BIOS SETUP mode?

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