Servicing a Star Wars I get random outhole switch activations. The flippers die and ball drains like on a tilt. No indication of slam tilt or anything. This is driving me up the wall because I cant seem to recreate the conditions. Its just random as far as I can tell. Has anyone had a similar issue? Also, why are some switches wired as normally closed while the manual indicates all switches normally open. Does it matter? Can the software cope with either?