I got a PS4 at launch and it was fine for a few weeks but then it started randomly switching itself on (whilst shut down) and also (even worse!) switching itself off when in the middle of playing a game. This lasted for a few days, but then the problem went away and I assumed that maybe a software update had fixed it, as there were plenty of others having the same problem when I looked online. I didn't have any problems whatsoever for the next couple of months until 2 days ago when it just ejected the game disc (again whilst shut down) and since then I've had the same issue of randomly switching on or off. I've had it unplugged from the mains overnight to prevent it coming on and earlier today I put it on to play Outlast. After 2 mins of playing it promptly beeped and shut down again as if somebody had pressed the power button on the console. This got me thinking, could it be these overly sensitive buttons being affected by dust or static? I wiped over the slightly dusty PS4 with a dust cloth, turned it back on, then played Outlast with no problems for an hour until I had to turn it off for dinner. It is too early to say whether this 'magic dusting' is a fix or just coincidence, but it might be worth a try for anybody else having this problem.