Fixed!  It was the sound amplifier.

I just bought a super Mario Bros that has no sound at all.  I've checked the volume control but that doesn't change anything.  The guy I bought it from said that he was playing it one day and then he heard a loud pop and it hasn't had any sound since.  Any suggestions on where the problem may be?

If yall are interested in this restore, you can check out the album here.  I've restored almost everything including painting on side art with a stencil.  Im aware that the colors are not perfect but im okay with that.

http://imgur.com/a/90GAB

Paint time!

The citristrip worked way faster but the same results.  I wasn't expecting to find vinyl under all the paint, I thought it would strip down to bare wood..

Like a magic eraser?   

When I bought gyruss it came with brand new stencils so it's tempting to redo it but I've also read gyrus is a pain to do.

Close to saving it but not close enough. I'm going to try citristrip on the other side, hoping that it eats it all a lot faster.

First attempt was with lift off but that wasn't strong enough to remove the thick black paint.  Goo off works great if removed at the perfect time as to not mess up the painted on art however getting that perfect timing is impossible.  I'll probably need to do stencils but it's still cool to see the original artwork appear even though it's in rough shape.

After further investigation I don't believe it can be latex because it's not rubbery and doesn't peal off.  It's like a hard shell that chips off.  I can use my nail but it still lifts some of the original paint.  Any suggestions ?

I just got a gyruss and the side art has been painted over with black paint.  It is my understanding that the original side art was painted on so obviously I can't use paint stripper however it seems like maybe it was painted over with latex paint because I found a small spot that seems to be falling off. Is my thought possible, and can latex paint be removed without damaging the original paint below?

My ms pacman arcade machine will randomly reset when I press player 1 or 2 after it's been on for awhile.  It will also lose sound randomly as well and won't come back until restarted.  Any idea what is going on?

I have already replaced the fuses.

Thanks!