Ok so I have a 52 in. Samsung that is less than 2 years old and my xbox is about a year old. I've had no problems playing using an HDMI cable. Yesterday I had to unplug the HDMI cable along with the one for our Directv (long story). When I replugged them in the xbox one says no signal. I have used the same cable to plug in something else and it works. I have used an avg cable (the one with the 3 colored plugs) to plug in the xbox and that works too so i know it;s not the xbox. Is there something that resets in the xbox or something that I have to do to be able to use it with an HDMI cable? I can't play using the other cable, the picture quality is horrible. I have searched and searched online and it seems alot of people seem to have this problem but no solution. Please help.