NEW: HP 15C Collectors Edition

[VoyagerBender]

(10-17-2023 05:35 PM)ctrclckws Wrote:  

(10-17-2023 04:24 PM)VoyagerBender Wrote:  Is there anything else to do in addition to the reset hole? How could I fix such a problem?

After you saw the PR ERROR, would the calculator turn off and on again?

Next level,

Get the PR ERROR as before, then take the batteries out.
Leave them out for a minute or so then re-insert them.

When you turn it on, you'll probably get PR ERROR again.
Turn it off and on again, hopefully, back to normal.

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.