Black spots on tv and getting double image..

Black spots on tv and getting double image..

I have a 70" 3 yr old vizio tv. Turned it on one day and had big black spots in the corners and a double horizontal picture. Not sure if I should keep it or try repairing it, I just don't know what the problem could be. Someone told me my LED screen may be bad and you can't buy replacements, is that correct?

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