HP 39GII Undocumented behaviour


First, sorry if this has been already reported. I just notice the following behaviour:

ON+ENTER (simultaneously pressed) locks the calculator. On my model with the last version of the firmware batteries must be removed.

ON+F1 (simultaneously pressed)seems to reset the memories.

Entering a negative exponent for 10^x makes the '10^' symbol disappears from the upper lines after pressing enter.

As a comment, if I like the calculator for all the functions it provides I find the display quite poor compared with competition.
Hope the Prime will correct that with a lighted screen.


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