Jeff - thanks for the suggestions. I popped the plastic key off the numeric 9 key, then removed the rubber cap to expose the two metal half-circles.
I figure the metal stud in the rubber cap completes the circuit when pressed, connecting the two half circles. I then used a steel flat head screwdriver to "complete the circuit". No dice. No change. Can you suggest what my next step would be? I'm happy to attempt cleaning that area of the PCB, but don't know how to proceed. Thanks. Tom M. On Sat, Jul 5, 2025 at 9:58 AM <[email protected]> wrote: > Could be the individual keys, could be corrosion on the PCB. Looking at > the schematic shows none of them have a common row/column in matrix so it > is probably a problem with individual keys. > > > > Easiest thing to try is pressing easy key firmly about 50 times. If you > are lucky this will bring it back to life. The T102 keys are harder to pop > apart and repair than the M100. After 50% of the time it seems like the > break (the ones with plastic retainer clip are the most likely to break.) > > > > Jeff Birt > > > > *From:* M100 <[email protected]> *On Behalf Of *Thomas > Morehouse > *Sent:* Saturday, July 5, 2025 7:42 AM > *To:* [email protected] > *Subject:* SPAM-LOW: [M100] 102 failing keys > > > > My spare M102 works fine - except for three keys not functioning. Numeric > 9, alpha O, alpha L. > > > > No response on screen whether lower case, shifted upper case, or NUM. > > > > The three keys are in a diagonal row. > > > > How should I go about tracing the problem, and repairing? > > > > Thanks. > > Tom M. > > Eastford CT > > >
