I just got a Demolition Man machine where the sound doesn't work. All I get is a single popping sound when I turn it on. The error that shows up is sound board interface error.

The voltages coming into the board are 4.9vdc and 12.7vac. I have reseated the connectors and the roms which did nothing.

I tried to find something online to help troubleshoot these boards and couldn't find anything relevant to my problem. I don't want to just start shotgunning this with components.

Hopefully someone can give me some guidance on what to look at.

I bought it knowing the sound didn't work. No, I don't have any other WPC games. I also forgot to mention that the only thing that doesn't work on the machine is the sound.

I reseated all of the cables and checked solder joints. I found 2 traces that were broken. All other connections looked good. One broken trace was going to Y1 and the other was between pin 55 of U1 and R12. I put jumpers in to make the connections. Still no improvement.