HP 41 not working

[d b]

Jose; There's a positive fix for your drawer of treasures.
In the early 2000s I found a few tiny springs that wanted to be just a little tighter than the 41's post o.d. I could barely get them on by rotating them so they would open up as I pushed them on. Rounding off the top of the post a bit helped. A couple of them also got a drop of thin glue to seep into the now-closed cracks, but I had no failures on any I did this to. Keep your eyes open. They're cheap if you can find them.
They should have came that way stock.