the thruth is, the company want you to trash the tv and buy another ..... the way with specialized stuff, is to remove carefully the ribbon, change the board, and find a way to resolder / conductive glue / heat gun
personally never done that.
For me when this happen for this kind of setup, i simply trash the tv, i try to repair the ones who has a separate and unpluggable t-con from the lcd panel, but its not an garantee you will succeed, some panels have the controller chip in / on the yellow flexible pcb, even changing the t-con board, the problem could be in the lcd panel ...
Had this problem on one 52 inch tv, the t-con costed me 10$ usd, but i had bought 2 good board for 20$, aaaand the problem was in the lcd panel
Maybe some members heres have some tricks