Thanks folks for the suggestions....
OK, so all I have is a hum in the speaker that gets louder if I try to adjust the sound POT on the door... no voice, no background. As I said, I'm a total rookie and don't have any previous experience, but I sure am learning a lot as I go. I have managed to get everything working on the game except sound..... I'm still looking and welcome any help...
Here's where I am on the sound:
- I did the simply obvious stuff like adjust the pots, check the flashes etc... I get the 5 flashes, and the game plays fine.
- I replaced all capacitors on S&T
- I replaced POTS on S&T board
- I checked the ground loops and have continuity
- I measured voltages on the S&T and all seem to be fine. I was able to test TP2 at +4.7V, TP3 at +14V, and TP4 at -4.7V.... Is TP3 High? does that matter? (I read it should be +11.5V).
- I replaced the screws holding the board to the frame.
- I removed and reinserted, jiggled, and twisted the J1 and J2 connectors.
- I connected an external stereo speaker and still got the same hum.
So I am assuming I have a good board? and a good speaker. the hum gets louder as I adjust the door POT.
People tell me I am overworking it and that it might be as simple as a ground problem, but other than checking for continuity, I don't know how to check it.
Help... the hum is driving me nuts!