NEW: HP 15C Collectors Edition

[rprosperi]

(10-17-2023 06:05 PM)VoyagerBender Wrote:  [snip]
Thanks for your answer .

Unfortunately, it does not work. When I try to turn it on (before trying to solve the problem), the display remains "inactive", whatever the key I am pressing (after having pressed the key "on"). I will test your solution again in few minutes (or tomorrow).

I just have the impression that there is no "built-in programmes" anymore in the calculator, as if the calculator was just an "empty keyboard". If anyone has another solution, I would be interested in.

Please try installing brand new batteries before concluding the h/w is defective. It may have ended up in some crazy mode and eaten through the batteries, and now after getting "PR ERROR" (which btw is not really an error, it simply means that power was lost and reset) there is not enough power to complete a full startup. It's worth a try...