Hi, thanks for any help you can give me!!! New owner of a bally all star deluxe bowler. I have two questions on how it works. Game plays great but will not give me a strike or spare. If I knock down all the pins on the first ball, it will still give me a second ball with nothing to shoot at. After the second ball with nothing to shoot at, it will score me 10 pins like they all went down but no strike. Same if it takes me two balls to get all the pins down. No strike or spare awarded, but scores me ten pins. Same for both players. Both steppers for strikes and spares work fine. Thanks for any help you can give me!!! Brian.

I don't have the schematic yet. Thanks for the idea. It does change to ball two, so I was assuming that back trip was working. I'll check tonight. Thanks