Not sure, I've had it for over 2 years without any problems whatsoever, and I was downloading some arcade content which kept failing, so I turned it off and back on again except it wouldn't come back on again.
I know some people get lots of trouble, but I've always been fine, guess it was saving itself up
and its MFR: 2007-08-13 so 13th August 2007 I'm guessing. (2 Years, 2 Months, and 3 Days old)
I've got all the stuff to post it off just need to take it to the post office now, if they're not having ANOTHER one of their delightfully lazy strikes.