My housemate resurrected one of my old PCs I had about. Windows XP installed perfectly fine and boots. However, when we press Del to try and enter the Bios setup, it only loads up a blank screen with blinking underscore. I've taken the motherboard battery out. Removed all the HDDS and tried booting. Still doesn't get any further then the blank screen and blinking underscore. Should I try flash the Bios or is there something simple that I'm missing?