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I noticed that on my tv it does this too, but it all depends on the device that is connected to the tv. If there is no signal, it will dim.
Sorry, there was a problem. Please try again later.Is there an eco mode turned on? I've seen that happen on LG sets where eco mode dims the screen after a few moments if Eco is turned on. I think I might have seen a similar setting on my Samsung, but I'm not at home to check right now. So I'm just guessing, unfortunately, yet am hopeful this might be the solution.
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