[damien c]

What I found with my Panasonic TV is that, I could connect it to any of the HDMI input's via a DVI - HDMI cable and I would get a picture but, to get sound I had to connect it to HDMI 1 and then use a cable that had a 3.5mm jack on one end and then 2 phono (Red + White) connection's on the other end, then in the sound setting's I had to change it from Digital to Analogue.

Then when I changed to my new graphic's card using the same DVI - HDMI lead, connected to HDMI 2 I got sound through my HDMI 2 connection no more messing around but, I just have to disable my speaker's for it to work.

Use the HDMI on the pc and not the sound card, put it in to HDMI 1 and if you have a lead like mentioned above 3.5mm to 2 phono connection, which has to be connected to the Red and White connection's for the Component video input.

I will post some pic's later when I get home showing where to connect thing's to.

With you saying that you have connected via VGA and it work's then I would assume that the HDMI on the sound card, is not the default display output.