I dropped my samsung tablet and it won't turn on. It was in a case when I dropped it that covers all corners, back and front. There is no visible sign of damage on neither the tablet or the case. I have never dropped it from more than 10 cm high and I'm not even sure I've ever dropped it. It doesn't do anything to hold down the power button. Do you have any idea what might be wrong and what I can do to fix it?