low audio problem on game pcb

What game is it?

That amp chip should probably have a heat sink on it but I've seen them without them.

Check your power supply voltages, I think the negative voltages usually provide for audio, maybe one is missing or bad?

jeff
 
hey jeff the game is mutant night, very weird game...this pcb is a bootleg but I want to fix it because I have never seen an original one.

I removed the heat sink because I replaced the amp and the voltages are ok, maybe is the 4558 but I don't have a replacement now...
I will try replacing the pot soon.
 
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