look this video i recorded:
i repeat, its not strong, just fast =(
if i hold power up and power down it enter in recovery but i cant do nothing, because it in 1 second reboot again =/
Not that i remember, i Dropped it sometimes, but this problem started "without reason"
Its stock and i tried the fullwipe, but now its impossible sincr i cant stay in cwm more than 1 or 2 seconds
Maybe i have chance that google can fix it? I sent it to a store to see if was something about the powe button, they said no and they cant fix the problem since they dont know and have fix accessories for it