This is the interior of the TV, with the top facing you (bottom side of the picture). You see the power supply board in the center, and the main board. The T-Con board is hidden by a metal cover.

To get to it, we will have to remove all screws on the parts that cover it. Luckily, the screws are marked with an arrow symbol.

Remove the wall mount bar by loosening the two screws.

Remove the metal part on the top which also is blocking access to the T-Con board.

Remove the T-Con board connectors.

Remove the 5 screws holding the T-Con boards and it's metal cover.

Now you can carefully shift away the metal cover of the T-Con board below the other metal bar.

Two flat ribbon cables are connected from the display to the T-Con board. They can be removed by carefully unlocking the socket (take some plastic lever or your fingernail and turn up the black hinge).