The Ming lights are fine. But working through a couple other small electrical gremlins. With the machine sitting in attract mode, if you trigger the switch for the saucer, the solenoid will engage. The other strange occurrence is the single drop target in the upper playfield, again while in attract mode, manually dropping the target has sometimes credited a game. Also once a game has been credited, sometimes hitting the right flipper will score 10000 points and create sound. I've traced wires under the playfield, but so far, have not found any that are crossed or touching or chafed. Not quite sure of a direction to troubleshoot in after looking at wires.