I'm very sorry for any inconvenience this may have caused you. Unfortunately, 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/
Regards,
HD Tech
Tv clicked off and would not turn back on last week. Main board and Y sustain board replaced.
Now we have sound but no picture. Have been looking all over the internet for a possible solution. Any ideas?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic