I have a Williams pharaoh that has had the sound go out, then come back, then go out. I thought it was tied to the pot inside the backbox. Now it seems pretty random. The sound will be there, then later it won't be there. The game plays great. When the sound is on it sounds great. When the sound is on the pots increase and decrease the volume (including the one in the cabinet). I'm not sure where to start to figure out what might be the issue.

does anyone have any suggestions?

I'll check that tonight.

I tried to push on the components on the sound board. The sound came back on with the next game. I'm thinking you are right that it is a loose solder connection. That is probably why it came on and off when i fiddled with the pot on the board. I probably moved the board enough to reconnect the loose connection. If it goes off again, i'll pull the board and reheat the connections.

thanks for the tip!

I wish I could help with this one. My sound never went back off and I sold my machine before I ever got a chance to look into it again.