I have a similar setup (samsung un75f6300 and V675), and I have my hdmi cable hooked up from my hdmi out on the Yamaha to the hdmi 2 (labeled ARC) on the TV. Originally it wouldn't work, so I tried new cables and that was the problem. I also have an optical from the TV to the AV4 optical on the Yamaha. Works like a charm. When I turn on my TV, my receiver automatically turns on as well. You might need to adjust your settings on the receiver by turning on the tv to hdmi 2 with the receiver on to turn on the ARC and hdmi settings. Hope this helps