50g Random Turn ON

[HPfreak]

Hello all,
I haven't seen any posts on this, so please forgive me if this a repeat.

My HP50g will randomly turn itself on. I have no alarms set. The only reason I know it does it is because when my 50g turns itself off (no key presses) for 3 minutes it gives a set of tones telling me it has shut itself off. No one has been near it, and like I said earlier, no alarms are set.

I was just curious if anyone else has had a similar experience.

I wrote an event log as part of my StartOff routine that I check fairly often and yes, my calculator will do it when no one is around.
Am I missing/overlooking something?

Thank you for any input!