Bally-Stern LDB - Pinball Electronics from barakandl
ULTLDB - From the makers of the ULTIMATE Bally/Stern MPU board and ULTIMATE Bally/S...
Williams/Bally WPC89 MPU Board #MPU089: The Pinball Wizard - Pinball Machine Parts and Repair
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
Action Pinball - XFT1 - Flash Gordon (Bally) Xenon Flash Tube (Substitute - SEE NOTE)