HP Pavilion a1020n, desktop. I need to get into Bios to change AGP to PCI video, but, I don't have a picture. I need step by step, keyboard instructions, because I can't see anything. HELP

On board and AGP are different.

AGP is actually a separate card.

So I'm almost certain if you put a PCI video card in the machine it would work and give you a picture.
Same from AGP card if you chose that Instead.

( I would go with the AGP because it is faster ;D )

It would be very basic colors and things until you installed the CD though.