LG 65UJ6300-UA - Screen Dim Towards Top

LG 65UJ6300-UA - Screen Dim Towards Top

I have an LG 65UJ6300-UA (software version 06.00.04) and the screen gets dimmer as it goes towards the top. I am pretty handy and can probably replace most parts, but I don’t know what to replace or what to test (I tried LG, but they weren’t helpful). Any advice would be greatly appreciated.

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