Every weekend I reset my HR24 to clear it's mind so to speak. Yesterday I decided that while it was doing that I would switch over to the wi-fi on the TV and watch some 4k You Tube videos. I did that. When I switched the source back to DTV is showed DTV on HDMI 1 on the TV screen and then went black. I tried changing the channel to make it redo the HDMI handshake. No change. I then tried turning the whole system off , TV and DVR, and turning them back on. Nothing. /Tried it again and left them off a little bit longer this time. Nothing. With the TV and the HR24 both on, I got up, went to the TV and unplugged the HDMI and plugged it back in. Yeah, back to normal. I will not do that again.