I've got no sound on my buck Rogers. When I purchased the machine it was very quiet but all sounds seemed to work. Over the next week the sound faded to nothing and I hardly turned it on except to work on it and test the game. I'm not sure how to test the board any other way.

All sound dip switches are set to on.
I have installed a rotten dog power board.
I've performed all ground modifications per pinrepair .
I've replaced all caps on sound board with new caps from big daddy.

I've still got no sound at all. The test button does nothing.

(Solution: new sound board)

My questions are now

1. Can I put the older 3 tone chime sound board from close encounters in its place?
2. Can I replace me sound board with chimes?
3. Is it possible that a replacement gottlieb system 1 sound board could be made?
4. Does anybody know how to test the sound board?

Good fuse. Swapped the speaker. And volume pot works. There is a hum when turned up but no tones

I will check and get back with what I find thanks

The traces are all fine. I was trying to avoid the all in 1 board unless absolutely necessary. I will try to find a u7 and see if that fixes the problem. If it doesn't then I'll have to go with the all in 1.

I wish somebody would make a new board replacement

Is it possible?

If the test button on the sound board doesn't produce any sound is it safe to say I need a new sound board? I finally found a replacement

I did not try to replace u7 but I found some chips online I'll give it a shot. I've already tried recapping it and I didn't want to keep replacing parts on the sound board until I know the sound board is my problem for sure. Once I get the new sound board and it works I can go through the old one and make it work. If it doesn't work I know I have a problem somewhere else. I need to eliminate variables before replacing parts.

I replaced the soundboard with a pascal and it didn't work. Then I swapped the speaker again I it finally worked! The original speaker worked but then after I recapped it, it must have just blown it out. Hope this helps someone, I will start replacing parts on the old board to see if I can find the offending component.