I have a Stampede also that everything works but the Ball Count Stepper. It is not getting power to the coil. I manually move the plunger and it advances as it should. It does reset to the first ball after I restart the game after manually advancing the stepper. I have cleaned all the scoring motor switches and checked the gap but you still play the game forever on Ball #1. Any help would be appreciated, I am still a novice but learning.