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
Playboy Bally 1978 V4 VPX - YouTube
Playboy (Bally 1978)FS - VPForums.org
Playboy (Bally 1978).zip - VPForums.org
Supersonic Pinball by Bally Flyer / Brochure / Ad | eBay
More | Sale n°4188 | Lot n°242 | Artcurial
FLIPPER "PLAYBOY " Bally Manufacturing, USA, 1978 Des… | Drouot.com