I have 3 1st gen Atv's that streamed my videos perfectly to 3 different receivers and displays for over a year. I also have 2 2nd gen aTV's that have worked for over 2 months. Randomly, all 3 1st gens stopped displaying my videos (purchased content and rentals still work, but home movies only play sound). I tried rearranging all the Apple TVs, but still found that only gen 2 are working. They are all streaming from the same Mac with the same movies that have already worked for a few years. What Happened? Was there an update to the 1st Gens that glitched the HDCP HDMI handshakes or something? Anyone else having this problem?