Posts: 1,788
Threads: 36
Joined: Aug 2007
Generally, once a key looses its snap... its all over. Nothing will get it back. The metal disk that forms the top of the key contact becomes fatigued. The key still works but the click... she be gone.
The HP41 keyboard is not designed to be repairable (at least not without causing more damage to the machine than you are trying to repair). Keys that double space or do not always give an entry when pressed are easily fixed by cleaning them out with a tiny wire brush (through the plated through hole beneath each key).
That said, sometimes the click problem can be caused by something spilled on the keyboard or a battery leakage problem. But this affects many keys at once.
Posts: 62
Threads: 11
Joined: Jan 1970
It's not a disaster. I thing the problem comes from a plastic pin under the key or a metal disc on the printed board. I often fixed that.