Pacman sound issue?

supercharged

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Oct 18, 2010
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Portland, Oregon
I have a pacman that plays just fine but if it is left on for several hours; it will loose it's sound.

turn it off and back on and it comes back.

I will occassionally see it get a scrambled screen that goes to a grid and resets. never does it during a game however.

Can't seem to figure out what it is.

Any ideas?
 
Last edited:
most likely the LM377 / 1877N is getting hot and shutting down. It is in the upper right corner of the board usually with a large gull wing heat sink on it. check to see if the heat sink is still there, if not replace the chip and heat sink.
 
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