Bally Star Trek display problem

wildwest3163

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the displays on my Star Trek are working intermittenly. Sometimes player 1, 3, and 4 will be on and 2 will be off, sometimes 2, 3, 4 will be on and 1 will be off, sometimes 2 of them will be off, sometimes all of them. Game has new MPU and driver, and I remember the game did the same thing before I replaced the driver (driver was replaced for other reasons) MPU plugs were repinned when I replaced the MPU. What could be causing this malady, its starting to annoy me. Im as soon as I get my parts order in Im planning on repinning the display connectors, but I dont see why that would make a difference.
 
Classic cold solder joints on each display board's connector header pins. Resolder them.

Dead on the money Ken. Looked at them under a good light and saw the fine cracks. Replaced the glass in one with burnt segments, swapped out one entire display, and reflowed the soldier on all four. Now all displays are nice and bright.
 
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