Hi my f14 tom cat has lines on the top 2 displays does any one know why?
Try reseating the connectors.
Have you taken the ribbon cable of at any time?
How does the ribbon cable look?
Could have had a udn chip fail, they are nla and you have to canabilize another display for them. I would try reseating the connectors as has been suggested.
Those appear to be LED displays. Note the slanted lines on the lower displays. As others have suggested, check the cables.
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