Hello
I recently bought a near mint HP-41CX. The former owner had it tuned for high speed, but after about 8 years in his drawer, the thing only works sometimes. When I try turning it on, the display sometimes shows "12:00:00 AM", as if it has just been performing a reset. Nudging the case a little, I sometimes can retain the calculator alive in a couple of minutes. How can I put it back to its original speed and woring state? How do I open it? I noticed that the rubber feet has been replaces with some kind of unoriginal pisces of foam-rubber, so I guess that I can find the screws under theese... Is there a web-page dedicated to HP-41 hardware, as in the case of the HP-48 opening?
Thank you from a newly started HP calculator collector, with only 6 HP's yet in stock!
Johnny!