Besides the sound problem, is the game playable?
Have you tried triggering (fingering) every switch and target in the game? maybe one of them is struck closed, hence it being in the 'let's flip mode' ??
OR at least try a switch-test in the menu option....
The worst thing is spending all day chasing a fault that doens't exist, simply 'coz a switch is stuck on (or switch diode shorted).
MM.
