HP12C turns off when I press n i pv pmt or fv

[Zak49]

This is a new calculator purchased off of Amazon. I've tried resetting the calculator many times.  This sometimes works for a day or two, sometimes does not help at all. But the problem always comes back.  

Any ideas if there is a setting wrong or something else I can fix? Or did I just get a defective device from the company?

Thanks!

[andy11]

First of all change the batteries for new ones.

[Maké]

Hi!, @Zak49:

Welcome, to Forum !.

See, this link ... http://support.hp.com/us-en/document/bpia5202

In specially ... 

If the calculator continued with problems, after resetting, or it didn't correct the error, then remove the batteries for 24 hours.

 NOTE:

The batteries must be removed for at least 24 hours to drain the capacitor completely.

After letting the calculator sit without batteries for at least 24 hours, replace with fresh batteries.

If the calculator continues, to malfunction, it may need, to be sent, in, for repair and/or change.