Many such devices connect the LCD to it's controller board with a layered
elastomer (rubber, to ordinary folks) that alternates conductive and
non-conductive layers. This elastomer structure just presses against pads
on a PC board. I've verified this part by taking apart dead watches and
calculators.

What I haven't verified is the failure mechanism or what to do about it.
The story that I've heard is that the PC board gets dirty or corroded and
fails to make contact, or the elastomer looses it's stretch, or both. In
the first case you're supposed to clean the PC board (pencil erasers are
_supposed_ to work here), in the second you either get a new display or you
find a way to jam it tighter against it's PC board. This was treated in a
QST article some time back, but I can't remember the year, much less the
precise issue.

"Paul Erickson" wrote in message
...
I have a Fluke 27 where some of the segments of the display do not
darken properly. Is this a known problem, and is there some way to
fix it?

cheers, Paul - VA7NT - email: