I have been repairing EM pinballs for years, but this has me flummoxed. After the reset sequence is completed, everything zeroed, the bonus unit starts adding bonus steps until it maxes out. My first thought is one of the six advance bonus playfield switches are stuck closed. Nope. Not the wires connected to those switches either. I have the manual and schematic. I am not seeing where the problem is. Any thoughts on this, expert or beginner, would be much appreciated. Thanks.