Press On and <-
My 41CX started to freak out a few years ago. Can't remember what triggered it now. I press On and nothing happens. I press On and <- and the summation+ symbol is displayed along with BAT. I press a key and it changes to NULL (and BAT). The batteries are fresh and no BAT annunciator on my 41C with that same battery pack.
I tried what I could, but gave up. Sent it in to fixthatcalc.com and awaiting repair. Hopefully its fixable. If not, I'll cry. Bought it in college about 20 years ago and had served me very well up until the day it broke (2001-2002).
I picked up the 41C a couple of years ago, to try to take the place of the 41CX. Not the same as the CX, altho it came with a card reader, quad memory, advantage pac, and time module. The 41C still works. Best of all, got it free. Friend was moving across country and didn't need it anymore. Was digging around his full garage full of "junk" and saw the carrying case. At first glance, I nearly had a heartattack and ran over to it. Opened it up and saw what was better than a bar of gold. A couple other friends were rummaging around and they just stared at me. Good, no competition.
Just bought up a 35s (arrived Wed, 8/15). Compared to my 41C/CX and 15C, that thing is fast. (yeah, I've read the other threads on the 35s... good & bad). So far, I'm happy with it and will take that with me to work. Afraid of my lone 41C getting lost/stolen. I esp like the dec-hex-oct-bin conversions. 41C has the bin/hex in the adv pac.
Would be kinda nice if HP made a modern version of the 41C, with goodies from today while keeping the original flavor. Designed, engineered, and built by HP, not farmed out. Wish HP would bring all of that back in house.