I bought this TV based on great reviews from CNET and other sites in February 2010. A few months ago it started turning off by itself. I read online that this is a problem for other models, but haven't yet seen that this applies to the UN55B8500. The "fix" is to turn it off, wait, and then turn it off. I've tried this and you basically have to wait for hours, which is great when you're trying to watch a movie with your on a Friday night on your $3,000, less than 2 year old TV. I called Samsung. While they acknowledged this as a problem on other models, and have supposedly issued a fix, they haven't yet acknowledged this as a problem on the UN55B8500. I said "it's the same problem, why can't I get the fix?" I guess because it hasn't become a big enough issue for Samsung to deal with. I think there may even be a class action lawsuit out there. I'm doing more research but wondering if other people have this problem, if they've reported the problem to Samsung and whether they've got any ideas for fixes short of paying hundreds of dollars to have a service tech come out. Needless to say, I will NOT be buying a Samsung TV ever again. They've lost me as a customer for good.