I just took a close peek at the connections. There are no zebra connections.
This has a small pc flex cable soldered to the PCB with the other end laid
against the printed traces on the glass. A silicon rubber block puts pressure
on the back of the cable which forces contact between the traces and the
cable.

Probably the block has shrunk with age and temperature and/or dirt came
between the connections. I'll dis/reassemble everything today and see what
works or doesn't...
--
DaveC

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