|Some old Intel motherboards had a jumper for a 'bios recovery' option. When jumpered there it would boot from a floppy having a bios update and install it even though nothing ever showed up on the monitor.|
I think there were some other motherboard brands that had that capability but not many. You should probably check to see if by chance your motherboard has 'bios recovery'.
If not, is the bios chip in a DIP socket (most aren't anymore)? If so maybe you could just order another chip.
Otherwise, is it cheaper to send it all to Deutschland or just buy a new motherboard?
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