Early SS Bally/Stern LED Adapters – Comet Pinball, Inc.
PINBALL: Repairing Bally, Stern Pinball Games 1977-1985, part two
Alltek Universal Replacement MPU Bally/Stern
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
Bally - Alltek Ultimate Aux Lamp/LED Driver
Big Daddy - Boards
PINBALL: Repairing Bally, Stern Pinball Games 1977-1985, part two
MA-09-011-043 - LED flicker eliminator kit Bally aux lamp board AS-2518-43