The Magic Screen games between Sea Island and Bounty have a design flaw that will sometimes cause a coil to remain locked on during payout.
The timer unit steps up in certain circumstances during payout and will shut off the motors. This causes a coil that is normally engaged during payout to remain on and fry. Fixing this problem is thankfully pretty easy! I would recommend that everyone make this modification on their screen games to prevent heartbreak when you're not looking.