I have a Bally Hi-Lo Ace that plays beautifully. The only issue I have is credits arent being issued when the high scores are hit. I checked the Jones switches in the head and the plugs are in the right places for the scoring. Does this have anything to do with the machine being set up to play just by pressing the play button on the front? Thanks!

Thanks for the reply. Yes it awards ball replays for specials and credits for matches. I will read thru the info from the link and check the items you suggested.

Thanks everyone for the info. I dont get on here as often as I would like. I will check out the items mentioned above to see if this helps or fixes the high school replays.

Does anyone ever experience a slow playing older EM machine? Seems like the bumpers, thumper bumpers, and everything just seems slow or weak. There's days when it plays awesome; and then on occasion just slow. Could be a power source issue?