This morning around 9:30 my wife turns on the tv in the den and receives no picture/signal from the 722k. Other video sources worked fine. Audio from the 722k to my stereo receiver was ok. All front panel lights on the receiver were normal. I did a front panel reset with negative results. I then changed out the HDMI cable and ran to a different port on the tv with no results. Only after I did a power reboot did I regain signal to the tv. I left everything on for about two hours and everything seemed normal. I then turned everything off. I turned everything back on about an hour ago and everything seems to be ok.