White screen of death problem...

So my iPod Nano 6th Gen got white screen of death a while ago.(the screen is white and can't do anything). I heard about putting it in disk mode and restoring it ...and i have to say it worked for a brief period of about 2 minutes. i managed to restore it and it worked until i turned the screen off...after which it went back to being broken. iTunes is recognizing it and all but ...white is all i can see... what should i do ..?