[fustrun]

I don't know if i'm doing something wrong but i kept the thing plugged in on the USB for an hour and it turned on and charged but as soon as i plug it out it says bye bye and turns off . . it says locked when i plug it to the usb and turn it on but start just fine and i can press everything . . i'm abit buffled . . i tried restarting . . dosent help
Any idea what's wrong ?