Chosen Solution
I have a similar issue with an LG42lb TV, uploaded a small vid of the issue here - https://www.youtube.com/watch?v=HTbIxL5I… What was the fix? If any?
johncol0110 this looks like a failed backlight array. You need to disassemble your TV/display panel and replace the LED backlight strips. Pretty much the same way as https://www.youtube.com/watch?v=T2FboV-1…|on here]