Got an issue with my game. I pinpointed the problem to three coils not firing. The switches associated with those coils are working and recognizes the ball. The three coils not firing are the ball trough, sarcophagus, and vuk North Pole. The Geneva and the ice cave work fine. Just those three. Could it be a bad diode? Loose or broken wire? Or even a blown fuse? Any help is appreciated! Thanks.