3 colored vertical lines on the right side of tv

First of all lemme say it's a 60lm7200 not the one I had to pick from.

K now, there r 3 lines the purple and blueish line r side by side and then a yellow about 6 inches to their right.

I been researching and it looks like It can be a bad t-con board, but I dont want to open it up without ppl agreeing with me as it's my only TV, and my baby lol. I bought it in dec 12’ so it's by no way a new TV.

Oh and when it first boots up it only has the blue line then in a few min the others appear. “Rappjng" on the back does nothing at all.

I am hoping its nor the panel as I couldn’t afford another TV like this, t-con no problem but i want to open it up to make sure i get the right board.

Thoughts?