Originally Posted by andy.hyde4
i know its not to do cm, i've been on stock for months now, i was saying i'm on stock so it is not firmware related.
surely the power button has nothing to do with it powering itself off?
Actually it probably does! Thought I'd jump in here - had the same problem with the device rebooting randomly or locking the screen (very rarely) - and then one day, bam, bootloop. Exact same symptoms.
It's probably a stuck power button : )
If you got your Nexus through Play (and it's within warranty), just ping them on the website, they'll RMA it and have you up and running remarkably painlessly. Not sure if it's a "known issue" yet but I'm glad to see I wasn't just crazy!