> -----Original Message-----
> 
> My keyswitch has been restored to service.  I carefully scraped (with my
> fingernail) the surface of the graphite pad to expose a new layer, and
> that seems to have worked.  Thanks to all for advice.

Just as a general question, since there was some good advice on this thread on 
restoring the normal keyswitches: I had a problem with the F8 key on my 'best' 
M100 (its only remaining problem was the F8 key).  I couldn't see any 
non-destructive way of taking the tiny F-key switches apart, so I ended up 
desoldering it and swapping it with the 'LABEL' keyswitch.  (I was going to 
steal a keyswitch from one of the parts machines, but their switches have a 
different click feel and I didn't want my best machine to have a different feel 
on the F8 compared to the other function keys.)

The switch undoubtedly has filth inside and/or the conductive pad needs 
cleaning, but without a way of getting the switch apart that knowledge doesn't 
help me.  The swap was a satisfactory solution for me because the key works 
intermittently (requires a firm press, and sometimes makes contact multiple 
times during a single press, which is annoying when trying to quit just one 
level out of something, like in UR-2 or Sardine).  It's fine as 'LABEL' because 
I don't often use that key, and there is very little consequence to multiple 
presses of 'LABEL' versus any of the other keys in that row - just keep hitting 
it until the toggling stops in the state you wanted. :)







        jim

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