Just got a Diner pinball that upon power up blinks "Pinball Missing" on the display. I think I have tracked the problem to a small black micro switch but not really sure as it seems ok.
Pictured below is my trough switches.
When I meter continuity in the switches they are all silent until I activate the switch. That is all except the small black micro switch at the top. It meters active and when I press the switch it goes silent.
I clipped the diode and it meters .55 in one direction and 00 in the other.
Thought maybe the diode is installed backwards but have no way to tell.
Any help or ideas about how to fix this are much appreciated.