MPU 100/200 battery board for Bally/Stern games – No Quarters Arcade
Bally/Stern Replacement MPU • Ministry of Pinball
AlltekSystems
CKBLY-MPU - Connector rebuild kit for wiring harness and board headers on all Bally and SEI Stern boards
Big Daddy - Boards
Ultimate MPU, Solenoid, LED/Lamp Driver & Test card | AlltekSystems
Early SS Bally/Stern LED Adapters – Comet Pinball, Inc.
PINBALL: Repairing Bally, Stern Pinball Games 1977-1985, part two
PINBALL: Repairing Bally, Stern Pinball Games 1977-1985, part one
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
Ultimate MPU Pinball Replacement w/ Test Card | AlltekSystems