1) For this: Anyone else having issues?
No, this is a rare issue. I can't remember seeing this on the forums.
It's very interesting that pressing n and power button brings it back.
What happens if
a) You press power button just once quickly. A tap instead of hold it.
b) You hold power button for 20 seconds.
2) For your headset it sounds like the jack is a bit loose. Do you plug it in all the way? If you do, and if on touching/hitting it sound still goes off then the connection might be loose.