Hi I recently just got a new tv its a Samsung flat screen its a little bit older cuz it was my sisters, she gave it to me after she got a new one for christmas, but anyway I hooked up my HDMI cord to the tv and the FiOS set top box. It worked great for the last 3 weeks now all the sudden it stopped working. I was litterally sitting watching tv and it just stoped working and its saying on the tv the its on a "Not Supported Mode". I checked all the cords in the back and there is nothing unplugged and everything is where it needs to be. Does anybody kno what I can do to fix this or what might be causing this problem??