Hello everyone and please bear with me this is my first post and first machine. I have tried putting this off by reading a lot of posts but I need your help. Speaking of help if just a few more people in the world could be just half as helpful as everyone on this site, the world would be a lot better off. Anyway I have a ’79 or’80 Silverball Mania and a ’67 Williams “The Bootles”. I haven’t turned on the Bootles machine and spending my time on the SM. My goal was to get all the lights working and switches working and leaving the “patina” let’s say and trying to sell it but I can’t because it’s too erratic. It boots up about 3 out of 5 times. I either get the full (7) flashes on the MPU or just (2). When it works it works I only have (2) bulbs left to replace and (1) display is out but it has what I believe you call “hacks” in it. Please see attached pictures and yes with all that stuff it still works but I can’t live with that. My main question on this post is with the erratic behavior should I replace the rectifier board first or MPU? I have the manual and I have tried recording the readings on all (7) test points on the MPU but I’m not exactly sure what the reading for each should be. Sorry for such a lengthy post and I hope I got some of the terminology down.
P.S. I don’t want to come off as putting a band aid on this unit, I’m just not sure how far to take the machine. I have a way of just going over the top with things when it comes to refurbishing them.