I am helping a friend try to find someone to service his currently non-working (not adding credits with coin drop, no display lights) big ball bowler in central Pennsylvania (near Lock Haven). This is one of those games likely from the 60s that was modded in the 80s or so with Bally and Stern boards. It was working until recently. I don't know much more about it other than the MPU is obviously a Bally AS 2518-133 and there is no documentation about the related board circuitry. I know the Alltek makes a replacement board, but I wonder if it would really work in a big ball bowler and whether the Bally MPU has dip switch settings that would match.
Servicing this myself is beyond my skills. Any leads or general advice is appreciated. A few pix follow.