Any chance of saving? I have an old Bally fireball home edition. I hired a guy to repair and tune up. He said the computer was shot and needed to be replaced.
Troubleshooting Early Bally and Stern Pinball Machines -
Bally AS-2518-22 Solenoid Driver PCB 105C Cap Kit - Arcade Parts and Repair
Bally/Stern Solenoid Driver Board AS2518-16 • Ministry of Pinball