@pcruns that is NOT a T-con board issue. That is a panel issue. The very first thing you want to do is to check all your ribbon cables. Remove them and check the ends for corrosion. Clean the connectors with a few puffs of compressed air then reset the cables and see if that made a difference. If not then you will have to check the cables from the T-con board to the actual panel. Make sure those are OK. Ultimately this looks like an error on the LCD driver board which is (sort of) permanently attached to the LCD screen and cannot be readily replaced by a DIY’er.