Perhaps you are having issues viewing Netflix, iTunes or any other streaming content via your Apple TV device? First, the short answer regarding the fix (in most cases)... 1). Leave your Apple TV device ON. 2). Turn OFF your TV for 10 seconds. 3). Turn ON your TV. 4). Now attempt to view the content on your Apple TV (hopefully without error). Behind the answer... Depending on the content being streamed, there is an authentication process that takes place when you request content. The user is usually oblivious of the this, that is until something goes wrong. HDCP stands for (H)igh bandwidth (D)igital (C)ontent (P)rotection. Even if you are only mildly interested in the 'what' of HDCP, I highly recommend checking out this simple yet concise and exhaustive explanation on Wikipedia, which can be found here... High-bandwidth Digital Content Protection - An Overview More specific information regarding the HDCP issue and Apple TV can be f...