No sound +12 vdc power supply is bad
Bad connection to the board.
JAMMA Harness connected improperly Miscellaneous
Try another +12 vdc power supply.
Check for +12 vdc power on the board.
Check for +5 vdc power on the board.
Check the volume setting in the OPERATORS ADJUSTABLE section of the Operator Mode.
Check the speaker connection.
Identify Pin 1 on the JAMMA connector and on the PCB. If installed incorrectly, damage to the PCB may have occurred.
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