The sound on my HOTD is not working. After replacing the pot, fuse, and sound board, I'm left with sound ROMs as my next guess to fix this beast. Can someone here burn and sell me the ROMs?
it's been 100 years since I've done anything with HOTD, but I did a Virtua Cop recently and it's got a separate amp board where the volume pot runs to. just follow the blue-green-brown wires and you'll find the amp. probably worth noting, that thing had a lot of cracked solder. the stuff's old, it needs some TLC now.
Doubt if its ROM issue. Verify no bent pins on stack connector between pcbs. Most sound issues are on CPU Bd. Do you have another ROM Bd Model 2C to verify?