I have a Shaq that doesn’t recognize the end of ball regularly. I’d say 9.9/10 ball 1 drains result in the game just sitting there not realizing the ball drained. Every now and then, hitting the flippers will cause ball two to turnover. All switches register in test. There doesn’t appear to be any notches in the trough causing hangups. Any suggestions? My next guess is that possibly one of the switches works in test but flakes in gameplay? Yet if I turn the game off and then back on again without touching anything, it knows one ball is in the outhole and three are in the trough. It will also feed balls out in multiball properly.
I’ve combed through the schematics and don’t have any leads. It’s available on Archive.org if you do an internet search for Shaq Attaq manual.