I'm very sorry for any inconvenience this may have caused you. This sounds like it may need servicing. Here's the thread where you can get details on setting that up: http://forums.cnet.com/7723-13973_102-542437/service-issues-click-here-for-help/
The TV had been serving me well until yesterday while watching CBS the screen went off. I could still hear the audio on my receiver. A power cycle did not help.
Unplugged it for couple of hours but it still showed nothing. Not even the source information that pops up when changing sources or channels. But the TV responds to remote when I try to change the channels, power it on, change sources etc I can hear the audio changing.
No improvement overnight. Today while inspecting the back I noticed there was a green LED flashing. Does that mean anything? Not sure if it was there before but I probably would have noticed it.
The TV is 3 years old but expected a $2k TV to last a bit longer. Any comments / suggestions appreciated.