Bally Williams WPC CPU Board repair
AND IF THE DRIVER BOARD WAS FAULTY IT WOULD BE USELESS AND NOT ALLOW THE TEST TO CHECK THE WORKING CPU SIDE. Williams any system 7 pinball machine send in board repair service send in your complete (in original failed state) non working 7 cpu, driverboard, and power supply.
AND IF THE DRIVER BOARD WAS FAULTY IT WOULD BE USELESS AND NOT ALLOW THE TEST TO CHECK THE WORKING CPU SIDE. Williams any system 7 pinball machine send in board repair service send in your complete (in original failed state) non working 7 cpu, driverboard, and power supply.