Having some issues on this williams lucky ace. 5 ball and 3 ball same issues. Ball count unit was dissasembled and cleaned moves good. Start up will sometimes give me one less ball. It will also sometimes subtract one ball during play. I think it happens during 50pt score motor movement but not sure. It will also randomly give a free ball not associated with special or highscore. This can happen during play or at ball drain Highscore freeball is another issue I'm having as it seems jones plug adjustment does nothing.
It will correctly give a free ball for lower right rollover when lit and for upper right rollover when lit.
The adding and subtracting of balls sure seems to be related, I went over score motor switches and all switch stacks for cold solder , solder splash and switches to close together and I did check all stacks for tightened screws in these circuits. I didnt find anything obvious.
This game also appears to be one of those factory games set up for aab only with no jones plug option for replay or novelty. I'm in Connecticut so that does make sense. Also the credit window had the silver tape covering it. Also found a weird factory mistake with 2 tilt adjust jones stickers instead of 1-9 liberal conservative.