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)FS - VPForums.org
HUGH HEFNER PLAYBOY PINBALL MACHINE
Playboy Pinball Bally Promotion Original Vintage Poster - Etsy
Sold at Auction: FLIPPER "PLAYBOY" No reserve Bally Manufacturing, U.S.A., 1978
Sold at Auction: FLIPPER "PLAYBOY" No reserve Bally Manufacturing, U.S.A., 1978