Hi:
The only suggestion I can offer would be to clear the CMOS, which should reset the BIOS to its default settings.
Since you didn't provide any information regarding your model PC, you can look it up at the link below and find out how to do that.
https://h22207.www2.hp.com/us-en
The procedure to clear the CMOS is normally found under the Motherboard specs section.
The other thing that may reset the BIOS would be to remove the CMOS coin cell battery.
Make sure to shut down and unplug the PC before working inside of it.