I have an orginal star trek board that wasn't booting.

I took the ROMS out because the U2 looked terrible. I put in another ROM set from another game and the boad works fine now so it looks like the booting issue was the ROMS.

U1 and U6 look fine but the U2 is a nightmare chip which looks to have been repaired multiple times in the past, but now is missing 3 legs completely and has a number of other legs soldered on.

I don't think I can salvage it so was wondering if anyone has any old non working boards that may have a Star Trek 745-12 rom in it that I could have to keep this boad original rather than jumpering it and putting eproms in.

Thanks.
D644A0B5-637A-46DA-9127-B7F78BE09475 (resized).jpeg