Calculator restarts randomly

[fakuivan]

I've had this happen a few times already, where the calculator would enter some sort of demo mode where, essentially a video plays showing off it's features, although this only lasts 2 seconds at most. I wouldn't have much problem with it except for the fact that it reverts the calculator to the state it was before the last shutdown, essentially deleting the history and variable changes for that session. I use this calculator for exams, it scares me to think that this could happen in the middle of an exam, making me loose 15-20 minutes of calculations.

Is there some combination of keys to activate this mode? I was not able to find a pattern between the several times this happened. Has anyone had this happen before?