I have the MC-700 and the a5175 amp. My current issue is when I am watching cable and I switch from my HDMI input to a different input to watch my 4k apple TV or my 4K blue ray player and switch back to the cable HDMI input I have no picture. When I turn my TV and system off at night the next day when turning the system on I have no picture. The only way it will display a picture is if I disconnect the power to the cable box and reconnect it. When the box reboots the picture comes on. I currently have a Samsung 65 8 series and Xfinity 4k cable box. The MC-700 is updated with the current software and all HDMI cables are high speed and anynet+ on the Samsung is turned off and the CEC on the MC-700 is also off. Any help would be much appreciated.