My TVs HDMI source is Xfinity ,, I feed it to my sr373 Onkyo receiver then to Sony Bravia ,,,TV looks and sounds great through the 373. At times,, I don’t want to turn on the 373, but there is no sound from the TVs speakers. I thought this would be an automatic thing, or that when powered down, the Onkyo would pass the audio through. Is there a way to pass all the HDMI info. through the 373 without powering it up? Is this even possible??