Is there a mixer pot for the music/sound? Sometimes they gum up and you just gotta wiggle them a little back and forth to get the wiper contacts to make a connection again.
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Quoted from dapperdan24:Would an issue with the pot affect only the music fx and not the sound fx?
Often times a balance pot is wired with the wiper as the output and the opposite lugs are the inputs from Speech/Music. I've come across a number of games (SS Bally games do this, as do SS Williams) where the trimmer pot is wired this way and gets gummed up and just has to be cleaned so the contacts can complete the signal path.
But in this case, listen to ndz. There is no trimmer pot on this game, as it is a set value via resistor, so you'll have to do some audio signal probing to get anywhere.
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