Have you tried reflashing your BIOS chip using an ISA video card to get a basic display on boot-up?
I had to do this once when a BIOS flash went bad. I booted my BP6 with just the ISA video card and a floppy drive with a boot disk containing the suitable BIOS software.
NB The Award BIOS chip has a section reserved away from the flashable part that can support the most basic of components.