okay, small problem.
Finally connected my PC to the new TV via HDMI. (Distance 2-3m)
Everything works great! I can play WoW on it and everything... but it has no sound.
My current setup is as follows:
2x 22" screens plugged in via DVI to Nvidia 560Ti
1x 47" screen plugged in via HDMI to motherboard
I have used this setup previously and even as my default while at uni. (sure it was a 22" screen but everything else was the same) I updated my drivers for the "Intel 3000 graphics" via Windows Update but no luck.
Displays work fine. Sound on any device other than the TV works fine.
All hardware other than the TV is the same as a previously working setup.