HP41CV freezes after a couple of seconds - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: General Forum (/forum-4.html) +--- Thread: HP41CV freezes after a couple of seconds (/thread-8233.html)

HP41CV freezes after a couple of seconds - Adalin - 04-23-2017 09:13 PM Hello I have a HP41CV that shows some strange error, after I press ON the calculator boots and shows memory lost, then it works for a few seconds before the display freezes and it stops responding to keystrokes I need to remove the battery and short the terminals for it to boot again but it does the same after that. The CPU board is of this design, I borrowed the picture from an old thread here at the forum When I got the calculator it did not boot at all and it was drawing a lot of current. I suspected that the big capacitor was the problem and it was indeed shorted. I replaced both the silver capacitors and then the calculator at least booted, but now has the problem I wrote about in the beginning. has anyone had a freezing HP41 before? and what was/is the problem? My suspicion is that its a memory chip problem