-you download this:
http://www.techpowerup.com/downloads/1061/mirrors.php

-put it on a bootable usb stick (to make a bootable USB stick google "hp drive key boot utility"

-then boot from the usb drive

-type: atiflash -p 0 (newbios)

if the SSIDs don't match then type atiflash -p -f 0 (newbios)