I have an HDMI cable going from the amp to my TV, and the amp has a combination of AV, component and HDMI inputs. I am trying to connect the Wii via the AV cable, however, when I change the input on the amp, I only get sound, no picture. The amp is supposed to upscale any signal (though I'm not bothered by this at all) so I assume it'd be able to output the video signal via HDMI? Anyone familiar with this amp? I've tried Googling, and the official Yamaha document only covers connecting the Wii with a component cable.