This document pertains to all HP Notebook PCs.
If the BIOS on your notebook becomes corrupted, such as from a failed BIOS upgrade or damage from a virus, the computer might show any the following symptoms:
The computer displays the error message BIOS APPLICATION ERROR 501.
The computer stops at a black Screen and it will not enter any of the Boot Options, such as: the BIOS Setup Utility, Hardware Diagnostic Tools, System Recovery screens, etc.
The computer does not boot and the Caps Lock key blinks twice or the computer emits beep codes.
The computer turns on but does not boot into the Operating System and it does not show any activity at all.
If the computer shows any of the symptoms listed above and it won’t boot up, use this document to restore the BIOS.
Many HP notebook computers have an HP BIOS Restore tool that might be able to recover the BIOS from an earlier version and restore basic functionality. This tool might or might not work in the event of BIOS corruption depending on many factors, but is worth trying in the event the BIOS has become corrupted.