I purchased a Bally Hi-Low Ace machine yesterday that had incredibly well preserved art work on the back glass and playing fields. That is were the adventure started; ball would not launch, ball counter not working. I cleaned/serviced the associated mechanisms and got the machine playing fairly well. Two hick-ups; the upper roll over switch for the "Ace" symbol gives me the points but does not turn light out on top and illuminate on the bottom of the field. Resultantly, I can never take the game to the next level. In addition the relay marked; "alternator" intermittently buzzes. I'm guessing the problems are related. I put the playing field up and zeroed a game/cleared the field. I then went to each of the playing card roll over/target playing field switches and tripped them manually. They all gave the points and went out/illuminated in lower playing field with the exception of the "Ace". It gives the points but does go out and transfer to lower part of playing field. Machine came with circuit diagram. Can anyone share their expertise and shed some light on what/where I should focus on to resolve these issues? Thanks!