Bright white light on corner of TV

Bright white light on corner of TV

Have a Samsung UN50F5500AFXZC Tv . Started yesterday with a constant bright light in the bottom left corner and was very hot. Today no picture. When it turns on the Samsung screen comes up, then I get white bands on one side then the other and then the screen goes completely dark grey (no picture) but have audio. Is it fixable or time to toss, hate to do that as it is only 3 years old.

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