what would cause sound effects to stop part way through? the background music wpuld continue but hitting targets, or super charger, none of those sounds were there. even when I started a new game the effects were gone.. then of course it went into endless multi ball. when I turn it off and on it was back to normal ,but there must be something brewing.. don't know if it makes a difference but since I have had the game, whenever you turn the power off there is a loud , almost like scratching an old vinyl record noise as it goes off..?