ms. pacman hum

Wolfinator

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There has been a hum coming from the speaker on my ms. pac. I cleaned the fuses and holders with steel wool, as well as the edge connection at the top of the main board. with the volume moderately low, it isn't overly noticable. Just a slight hum now, but it goes up if I turn the volume up. Any other ideas? Or should I jus accept it?
 
The edge connector itself could be bad. Sometimes scrubbing isnt enough, might be time to replace the fuse blocks and edge connector. Are you using the filter PCB? If so, lose it.
 
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