Thanks to all who responded, now that my news provider seems
to be working again I was able to read and search properly and
I have the answer, clean thoroughly with rubbing alcohol and
reassemble.

Possible warning.

I have never cleaned the zebra strip on malfunctioning LCDs. But I have
cleaned the board contacts, and the units were restored.

I would start by cleaning just the board contacts, and seeing what happens.

If you do wind up cleaning the zebra strip, do it by rolling the swab over
the strip, rather than rubbing it.