I have been having the same problem, I tried the above solution with memory card but wasn't able to get that to work, upon more research I found a post that said to remove the back cover, and unplug and replug the circuit boards, and anything that has a plug, and blow the dust out of the connections. Very easy as the post said, nothing that can really go wrong, the tV was useless. Low and behold, upon re installing the back and plugging in the set, for the first time in a month the set is working. Low tech, solution even I could do. Sorry for the neighborhood fix-it guy, he would have charged me 50 bucks just to diagnose it and Whatever part he thought I needed. I love the internet. Thanks to those that forged the road before us.