If this does not work there is one other thing you can try to do. Hook your ipod touch up to your computer that you use itunes on. Itunes will detect a problem with your ipod. You can try a restore of your ipod from your computer.
If this does not work its time to return or send your ipod back to apple so they can repair it. I talked on the phone with a apple technical support agent and this is what he had me do. So to save you a 45 minute phone call try this out.
If you have had problem with your ipod touch or phone with the screen turning white. I will show you how to fix it.With a system reboot
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