I have a 4g nano and when i plug it into my computer it is recognized and everything seems fine, but, the screen is blank. The backlight will come on but no picture, no menu, nada. Just a white screen. I can load music and everything but it doesn't change anything. I tried to reset the ipod, and i tried to refresh it. Nothing made a difference. Any help would be appreciated, if all else fails it's still under warrenty.