Hi all!
I have two keyboard problems with two of my HP-42S calcs.
1) On a USA built Rev A the LN key has become unresponsive. It works if I press it firmly but not with a light press (all other keys do).
2) On a Singapore built Rev B the STO key has a very annoying clicking sound. Sometimes the sound goes away if you press it two or three times, but it comes back if you have not pressed it for some time.
Is there anything I can try to fix these calcs? (Blowing them with compressed air? Cleaning them in a ultrasonic cleaner? Anything else?)
Best regards,
Erik Ehrling (Sweden)