I just found a box with an old HP 41C in it. It powers on ok and everything works fine.
The problem though is that right half of the ENTER key is "loose", just hanging down.
My guess is that there is a spring for every key, and two for the ENTER key since its larger. The right
one of these springs seems broken.
Is it worth the trouble to try and dismantle the keyboard unit and try to fix the key ?