I just got this receiver yesterday and it sounds GREAT but for some reason whenever I try and play a PC Game through hdmi setup I get no sound. The weird thing is when I hook it up through Optical on my pc it plays??? The manual say not to have both hdmi and optical hookup from the same source but thats the only way I can get sound to play for my pc games.
Perhaps there's some DirectX setting or something that is changing things on you? Unfortunately it's been a while since I was big into the details of PC gaming systems so I don't have a lot else to offer.