I have an HP41CV that was stored for about four years with battery left in it. I recently decided to resurrect it but find that I cannot breath any life into it. It was working when stored but is now as dead as an Auk.
I also have another 41 that works fine so I tried swapping bits back and forth to determine which part is faulty. It turns out that everything in it works except the keyboard/display unit.
In other words the problem isn't related to any of the usual things like crook battery contacts, poor contact between the printed circuit boards, etc. It would appear that something on the display/keyboard unit has died in its sleep. Either that or there is something that needs to be reset.
Any ideas will be greatly appreciated.
Cheers, Ron