I have a radio transceiver with an LCD which is having faded and missing segments. The interesting thing is, the segments are not behaving consistently -- that is the behavior of a segment can depend on the other segments. Unfortunately, I know I was the cause of this. The LCD is mounted on a board with an encoder, a microcontroller, and a few other things. The board is then glued into an aluminum housing, and the house housing is screwed into the radio chassis. I removed the housing, and then sprayed Deoxit D5S-6 through a hole onto the front side of the board with the encoder (and the LCD) on it. Unfortunately, that hole (a few mm in diameter) is really my only access unless I remove the silicone glue and hope that's all that's holding it in.
I'm sure the LCD is something custom. I suspect the radio itself is a circa 2000ish design, and this particular unit was probably manufactured in the mid to late 2000s. The display is backlit with the format:
xx
xx.x 1XX.XX
--- ---- ----
Where the "----" is a solid line and "x" is a 7-segment, that's smaller than "X". Soooo, total of 69 addressable segments?
Since I haven't been able to remove the board it's hard for me to find markings on the display or even how it's mounted (soldered versus zebra foam). The only thing I tried (in case not all the fluid had evaporated) was to stick it in a plastic bag, and then bury it in a sandbox, and then stick the sandbox in my oven at 75C for 12 hours. I figured this would gently raise the temperature up enough to dry accelerate evaporation without being hot enough to risk damaging anything. It might have improved things, but I can't really tell... The display goes through a self-check on power up and indicates on all segments, and they all work when in this mode.
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