Q: My Ipod nano 6th generation screen went white and wont turn. what do I do?

Did you try this?

Display shows a white screen

• Try putting the iPod into disk mode:
  • Reset the device (press the Sleep and Volume Down buttons simultaneously until the display turns black—about eight seconds).
  • When the display turns black, hold down the Volume Down and Volume Up buttons simultaneously until the device enters Disk mode.
• While the device is in disk mode, sync it to iTunes and try to restore.

copied from iPod nano (6th generation): Hardware troubleshooting