I can't remember exactly which of these is Yamaha, which Denon, but -- Yamaha can pass through last chosen HDMI Yamaha can select HDMI even though the Yamaha is off One or the other or both can be set to pass one particular HDMI when the power is off.
It was cool seeing the HDMI be switched when the Yamaha was off. I keep getting customers who want to be able to watch TV and DVDs with the system off or on, so this is great.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw