Repairing Problem Keys

From Wee-Meng Lee:

Unresponsive keys can be caused by some mild corrosion or dirt in the keys. I get it all the time and being in Singapore it takes too much trouble to send a key to me from the Club100 in the U.S. .

Try taking the key apart and cleaning the copper contacts first. You don't need to do unsolder or open up the M100 case:

• Pull out the key cap, by "levering" it out with two teaspoons.
• Use a jeweller's flat screw driver and pry open the latches at the sides to remove the top.
• Remove the inverted rubber cup.
• Check that there's still some black carbon attached to it; if not, you can try sticking some rolled up aluminum foil in it and in the mean time ask Rick for a key.
• Clean the copper contacts at the bottom of the key by using the eraser at the end of a pencil and rubbing gently until it's shiny.
• Put back the rubber cup, turn on the unit and press the cup down. With any luck, the H would work again.
• Reassemble the rest of the key.