TCP50G25 on 8800 GTS 320 via DVI-HDMI

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First time I ever try this and it seems that my computer can't detect the TV...

 

[thetoof]

Tried:
VGA - works but the full resolution isn't available and there's a lot of noise
Booting the computer with only the TV plugged in - nothing happens
Plugging the TV after booting with a T230H - as if nothing was connected
Plugging both at the same time - same as before

Uptaded TV and GPU drivers.