Some keys stopped working

[MullenJohn]

Hi, My HP Prime G1 bought on 8/29/2017 does not work when pressing the following keys on the keypad: 5, 6, (multiply key), Apps.

Also cannot get it out of CAS mode.

Has something like this happened to you?

Any recommendations on a fix?

I have reset it using the small hole on the backside of the calculator?

Thank you - Cheers!