@hnovitski your TV is running into issues with the Gate drivers. These IC’s are mounted on a flexible cable(s) which are bonded to the LCD panel. Their function is to activate each row of pixels. they are coming of the LCD driver board. That is the board where the flat ribbon cables from the T-con/Main Board connect to. Since there is no data or schematics readily available for this, it'll be very difficult to fix. Take a look at the thin ribbon cables (DO NOT TRY TO REMOVE) on the LCD panel and see if you find any corrosion, loose cables etc. Sometimes just pushing against the cables will make a difference.
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Of course check all the interconnect cables for any corrosion or tears. Make sure they are all seated properly etc.
@hnovitski your TV is running into issues with the Gate drivers. These IC’s are mounted on a flexible cable(s) which are bonded to the LCD panel. Their function is to activate each row of pixels. they are coming of the LCD driver board. That is the board where the flat ribbon cables from the T-con/Main Board connect to. Since there is no data or schematics readily available for this, it'll be very difficult to fix. Take a look at the thin ribbon cables (DO NOT TRY TO REMOVE) on the LCD panel and see if you find any corrosion, loose cables etc. Sometimes just pushing against the cables will make a difference.