So I'm getting a weird column ground short on my MM, it's column 6 (left ramp enter, left ramp exit, right ramp enter, right ramp exit, left loop low, left loop high, right loop low, right loop high).
I go into switch edge test and hold down any one of that columns switches and get the ground short message, however this happens intermittently. If I hold down one of the switches, but slowly lift/move the playfield the switch will go from the ground short message to registering ok. It also happens vice-versa, the switch will registrar ok, then I move/lift the playfield and will get a ground short. Slight shaking of the machine sometimes produces the same results.
I reseated the connector in the head, moved around the loom under the playfield and checked the connections to the micro switches. I have the gold mirror blades, is it possible that something is grounding out at that point? Doesn't look like it on visual check. I'm open to an ideas, as I'm not sure where else to look. Thanks for any help.