Been working on this puck bowler. United Cherokee. Checked all fuses, cleaned all steppers, cleaned and adjusted all switches. Here's the problem. Plug the game in, turn on the switch, game shows game over. Hit the credit button pins reset, score drums reset, player 1, frame 1 activate. Shoot the puck pins retract, shoot second shot pins retract, then reset, but score does not activate. Frame count does not advance. Some time I have to shoot three times before pins will reset. After maybe six shots the pins will not reset, and if they do the rollovers do not work. I am stumped.