I have installed everything on my apple TV 2 (Black). All worked flawlessly. I set up xbmc and plex, all ran perfectly. I then took the unit upstairs to our main t.v. Now all I get is the flashing light and the silver apple logo. Brought the unit back down and tried to teather boot. Worked ok, took it back upstairs nothing. As soon as I unplug the unit, all seems to be lost. Can someone help??