280-ZZZap! Sound Help

ComputerSpace

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Does anyone know what sound amp chip this game uses and where it is located, physically, on the boardset?

I'm going to take a stab on changing the sound amp IC and see if that brings it back.
TIA
Tom
 
LM377.
Is there a heat sink on a chip? If so, that's probably it.
Make sure it's got power, first (20V unreg.)
 
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