I have a new desktopcomputer with an Nvidia GTX 560 graphic card that I today tried to connect to my TV, an LCD 42 "LG42JH4020. Bought HDMI cable and connected.
The image that is transmitted to the TV is a "frozen" image of the desktop background (= HDMI cable works?). It can not be manipulated more than that. Tried with different drivers
(285, 290, 295) which does not affect the result.
(On my erlier computer there where never any problem to transfer the image to the TV, thought that was with the VGA-port.
I have tried via the 3 HDMI ports available on your TV