Mysteriously lost sound yesterday on my Mystic while trying to get it ready for MGC. I get nothing out of the speaker - no static, nothing. Got a different board, plugged it in, got the power on sound, then nothing after starting a game (wrong game ROM in). No power up sound anymore, either. Then something happened with that board, and now I get power up and test sounds out of it. Afraid to start a game or swap ROMs. Is there a way to drain the caps on here or something to reset the board? All the voltages seem fine, including changing voltages for the "with sound" if I push the test button.