UPDATE: Apple Workaround for iTunes HD content displaying white screen using Apple TV
Edited by Joe Aimonetti
Some people are reporting issues while trying to play HD content purchased from the iTunes Store on their Apple TVs. Although in many cases similar to this, the easiest suspect is the content itself. MacFixIt user Mark Lilienthal has discovered that the Apple TV has restrictions regarding how it's setup and how it displays HD content:UPDATE: If you are experiencing this issue (with HD content or otherwise), try these steps from a recently modified Apple KB Article:
1. With your television still on, restart the Apple TV by disconnecting the power cable from … Read more