I have a Blackout pinball machine that had the two fuses added for the bridge rectifiers AC side.
The added one for the lamp matrix blew (blue wires), but the associated bridge rectifier seems to test good. So what could have caused this?
Perhaps unrelated, but just to add... the sounds on the game start out strong and then soon fade to be barely audible. It looks the the sound card was redone with new capacitors a few years ago and had been working fine. Is this related at all?