No Backlight and No Image But Has Power

TV Model: PS59D8000

The TV turns on then it turns off after a short while. If I unplug the black cable to the tcon board as shown in the image below, it turns on and stays on.

I have unplugged every other board and it does not stop it from turning off. Nor does it make the backlights work.

I am curious to whether the tcon board is what sends the signal to allow power to the backlight? I know it processes the image, but does it determine whether the backlights receive power? If so, I believe it could be the tcon board, but I am new to this. I also replaced the powerboard with a brand new one, which changed nothing.

Here is the entire TV backpanel:

Any help is very much appreciated :)

Part numbers:

Powerboard: BN44-00447A

Main: BN94-04680C

Tcon: LJ41-09448A