PINBALL: Repair Bally 6803 Pinball Games 1985-1989.
Alltek Ultimate Lamp/LED Driver Board Bally/Stern
Ultimate MPU Pinball Replacement w/ Test Card | AlltekSystems
Big Daddy - Boards
Here's a follow up image from my first post on this Bally 1978 Playboy machine. I've opened the backbox and the mpu looks like this (mainly corrosion on bottom). The light blinks