I have 2 722k receivers with MT2 OTA modules. They both do the same thing and if you remove the OTA module the problem goes away. Dish has replaced the receivers and the modules with no change. The problem: At a random time frame the receivers will stop responding to remote commands, or when you go to turn it on you get audio but the display still has the bouncing dish logo on the screen. You can change channels and the audio changes to the right channel, but the picture is only the Dish logo. This occurs over the HDMI connection and also on the TV2 output on channel 60. Has anybody got any idea at all of what is going on? Dish suggested dropping down to a 722 instead of the 722k but I want the OTA on my second TV which I'd lose with the 722.