RRRRRRrrrrrrrr! My Microsoft Comfort Curve 2000 keyboard is back from the dead, for now at least. After reading on the net numerous reports of key issues, and hating hating hating the replacement spare I was using, I figured I had nothing to lose by trying to fix my malfunctioning keyboard. So I opened it up with relative ease to see what I could do.
The internal circuits are essentially painted conductor on thin plastic film. I noticed a number of dark areas probably due to oxidation. So I cleaned these areas with a cotton swab dipped in alcohol, drying the swabbed areas with the dry end of the swab. I paid special attention to the area of the bad R key. I then reassembled the keyboard and am happily typing this post with it, R’s and all!^___^