I couldn't resist a recent M100 on ebay listed as "not working". The main issue was a dead contrast pot, which I have temporarily worked around and ordered a hacky replacement.
The polarizing film is also very bubbly and no amount of smoothing made it stay flat on the LCD. Is there a known replacement for the film? Most importantly, I noticed about a half dozen non-functional keys. After disassembly I discovered corrosion on their diodes. Upon closer "inspection", said diodes disintegrated. So my second question is: Is there a particular diode I should replace them with? I have tons of 1N4148s, which look like a match (and electrically drop about the same voltage), but I can't find a spec for those diodes on the m100 schematics. Thanks -David
