After installing ATV Flash my ATV was running, albeit very sluggishly in terms of remote commands. Now after a few days the thing is a brick. Its boots up to the main screen but will not do anything after that. Ive tried several remotes and my iphone remote, both get no response from the ATV, its just frozen. My iphone remote does not show any movies listed on it as it normally would but my itunes still sees it once it boots up. Since the remote wont control it, how do I reset it to factory settings to start from scratch?