This is a test of commonsense. Complete the next sentence:

How to fix a white screen on an ipod
Let your device turn itself off.
This means you shouldn't be seeing the apple logo on the screen, rather it should just be black. If you must, wait until the screen turns off.
If your device won't turn off, let the battery run dead. This may take a few hours, but if your phone is no longer responding to button use and won't turn off, it is the best option.