relatively new 50" UN50NU7100F 4K TV, and the left half of the screen is failing and fades to black. Not just cut off, but fades out. Right half of screen is OK. Fails the picture test, meaning that I still see the issue with the tes tpictures and resetting the TV also did not good. Hardware failure? Main board or Screen itdself? Is the screen something one can replace?
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