I got my SM-P601 two weeks ago, and it's been working perfectly until last night. At first it started out as a delay in the screen powering up after sleep, when I press the power button, you can hear that it has woken up but you don't see the screen until after about 2 seconds. After a while, the screen no longer powers up, you can hear all that sound when you wake it up, when you unlock it, and even launch games, you can hear all of it, and even the touchscreen is working, but you can see nothing, just plain black screen. I tried a factory reset using the button combination method and I think it worked (can't really tell), but nothing has changed.