@lektroflow yes, the cables are different so swapping is not a good idea. This sounds like the buffer board to the side where the screen still shows lines etc. has failed. See if you can get some pictures of those boards and if they interconnect. Your TV may have two or even four of those boards. We'd have to see if we can maybe find the issue on those boards. These boards are considered part of the LCD display by the way they are connecting (special bonding procedure) and are not replaceable. Check for the bonding of each CoF (which are the "plastic" ribbon cables that connect the boards to the LCD). See if you find corrosion, tears etc. You will only have to focus on the side with the anomalies (left half :-)