It was working, packed pin up and took to an expo... set pin up, dead segments in display at the 10th and 16th positions. I've swapped out the ribbon cable with a known good one, no change. Visual inspection of circuit board, no issues found (cracked solder joints, burnt spots).

Right now I suspect a single point of failure, but I don't know what drives any given position on the display and in looking at the factory wiring diagram, I can't really make out what I feel is a common location for both upper and lower rows that might cause this.

Any suggestions?
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Whirlwind in case it matters.
EDIT... Earthshaker.. it is Earthshaker that has this issue.

Ugh... yeah, Earthshaker, I swapped out the ribbon cable from the Whirlwind, no change.
There are no IDC connectors, I did crimp trifurcon terminals... however, I'll admit I did not replace the headers on the display, but did everywhere else. Wiggle testing and unplugging/plugging the display up hasn't helped.

I can go ahead and reflow the headers on the score display, no harm in trying that out. I've not tried swapping out the display to the Whirlwind yet, can give that a go unless they are some how oddly different.

FIXED!

Desoldered headers and then resoldered. Plugged back up, all good now. I went over the header with a strong magnifying glass a few times, never saw any visual issues. And nothing had been unplugged during transport... pin do what pin do...

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These are the original headers on here. If it gives me any more issues I will replace them at that time.