hp41cv memory lost

[damaltor]

(02-09-2016 02:39 PM)ElectroDuende Wrote:  

(02-09-2016 11:06 AM)damaltor Wrote:  I removed the battery pack, and had none in there while building a new rechargeable pack. I left the calculator sitting over the weekend without power supply and without battery, and when i wanted to put the finished battery pack in i remember that i definitely pressed on a lot of keys before inserting the new pack. The calculator started without memory loss and all programs were still there.

As far as you don't press ON, it will keep your data for a long time.

I think i did - i wanted (!) to clear memory because i wanted to start with a fresh system, as i wanted to write a test program to test the quad mem module i got. So i thought to myself, i had the battery out now for 3 days, press a few keys to be sure the memory is cleared. Also i am pretty sure i pressed on, because i pressed the first two or three columns of keys from top to bottom.
Might be that my memory is wrong though, and i missed ON...