Hello, I am embarrassed to post this but I cannot seem to get into set-up menu on new Denon AVR-X3400H. I have the receiver connected via HDMI (ARC) on both the receiver output and the correct HDMI (Arc) input. It's a fairly new 60 inch Samsung Smart TV and good quality HDMI. I sometimes see it 'Flash' into the Denon setup menu and then it no longer sees a signal on the TV. Do you think I may be dealing with a Samsung issue or a Denon issue? Any ideas? Thank you! Ross