I have a 92' Data East pin that I am having a problem with. When I turn the game on the display says 1 BALL MISSING, even though all three balls are clearly in the game. I have to continuely turn the game on and off or continue to hit the start button until the game finally starts. The game will play fine for a while than it will not read that all three balls have not returned to the shoot and I will have to reboot the game. Does anyone have an idea what may be wrong.