Chosen Solution
Blue and red vertival lines on Samsung 4k 50" I am looking to fix a UN50HU6900F. The previous owner didn’t want to take the time to figure it out. The vertical lines are near the middle of the screen, running from the full height of the screen. Other wise TV seems to preform perfectly.
@i8infi8ini8ity could be a panel failure as well as a T-con board error. I’d start with the T-con board. For that you will have to remove the back of your set and check the board as well as the cables that are going to it. Make sure they are fully seated etc, Post some images of your boards so we can see what you see and possibly help you further. Use this guide Adding images to an existing question for that.
