Where to start: Demolition Derby with no sound

Bullwinkle

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I've gotten my demolition derby to a point where it plays, but has no sound and I'm wondering where to start...

What I've done:


  • tested cheapsqueak board in another cab..works
  • tested dual amp board in another cab..works
  • sound has worked in the past.
  • speakers work, tested in another cab

currently:

  • wiring harness to the front door is disconnected (I don't see how this would affect the sound, but please let me know if there is a correlation). It is disconnected because, when I plug it in, the game seems to be stuck at the test screen. Does it need to be plugged in to produce sound?
does anyone have a suggestion on where to start? I'd like to verify that there is some sound output happening from the boards but have no idea on how I can test this or where the "starting" point would be.

I've been looking for a new wiring harness for a 2p upright but have had no luck.

thanks in advance

-tom
 
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