i got a problem with my iPad..
just now i lend it to my friend to use it..
and the screen seems to be locked..
and i cant unlock it...
but the screen can be rotated..
and then, i force shut down my ipad, charging it..
after then, i switch it on, its seems dont loading..
just with whitescreen..
the whitescreen have been already for 25 minutes...
how should i do??