I've been having the exact same issues with my Samsung TV (55", not sure of model number). At first, it only crashed when watching Hulu, but now its doing it with all of the apps, as well as restarting itself randomly. Recently (in the last few months), the sound randomly goes away and I have to reboot. I've tried Samsung support and got nowhere other than the same things others have reported. This is my main tv and I use it all the time. It's very frustrating and if I had the money, I'd go out and buy a different tv and trash this one. Not happy about this and it looks like everyone else is having the same problems, so Samsung should send out a recall or something to fix this!! Since software updates only worked for a while, it sounds more like a hardware issue to me.
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