williams sys3-6 displays disappeared

firepowerplayer

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I was working on a United shuffel bowler. It has williams system 3-6. not sure. The dispalys were working till we slid the playfield a little bit more into the cabinet, so the bolts would line up. I had replaced the glass on the 2 non workers, and had no problem till that happened. Now it will not coin up, and no displays. The 2 led's on the board are not lit. I traced the + and - 100VDC to the master display. Now waht? I have a logic probe and a voltmeter.
 
The dispalys were working till we slid the playfield a little bit more into the cabinet, so the bolts would line up.
could be a simple problem, I had a similar problem with a data east, worked fine when the backbox door was open, when the door closed the last 1/2 inch the displays went off. Turned out when I closed the door it pushed against a weak connector in the harness. Wiggle each plug in your harness between the backbox and cabinet and see if the display comes back on.
 
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