marble madness 6502 error

163154

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Sep 6, 2011
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keswick, ontario, Canada
looking for some help in solving a 6502 error on a marble madness machine.
I have cleaned the connection between the two boards
recaped the Cart board
the machine will go into the diag screen for the switches and nothing else.
It will fail the sound processor test in the diag screen.
any advice?
 
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