NBA Jam TE sound issue

tomtime

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I have a TE boardset that has something going on with the speech. Sometimes it works, sometimes it doesnt. I went through the rom tests and everything is good. Any ideas?
 
could be a failing cable or connection somewhere but since it's intermittent it's gonna be tricky to replicate/track down.

I'd try another ribbon cable first and volume pot if you can, visually inspect the caps for leakage/popped tops (it could be that a cap is failing but only after a certain point).

of course do the usual pull the chips and clean the legs, and check your voltages as well.

let us know how you make out.
 
Could be flaky -5v line, it does the same thing with some variants of the mortal kombat boardset, which uses the same hardware.
 
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