I've been watching my new pc on my tv via vga but now I'd like to use hdmi. Why won't the pc output to the hdmi port? Do I need to enable something? The picture is still coming out of the vga output but I can't find a way of telling the pc to switch ports. I've trolled through control panel and even through media centre's setup but nothing seems to work. I have resolution set to the lowest setting and I've checked all my drivers are up to date (it's a brand new computer).