I was trying to adjust switch for the jet bumper on my Black Knight and forgot to turn it off first. Now I figured I shorted something because the jet bumper coil keeps locking on. It doesn't lock on when the machine starts up, only when a game is started or test mode is entered. I've checked and So far I've replaced the diode on the coil, IC6,7,8,9 and Q4,6 and I'm still getting the same issue. Anyone have a recommendation on what to try next?