Please Help Diagnosing Sharp TV Fault

I have a sharp LC-70L836E displaying green black and blue boxes. I am trying to figure out if it's a tcon/mainboard related issue or if its the display panel itself so that I don't waste time and money repairing it as parts are difficult to find. I'm no expert but am a diy man through and through, have repaired everything from smartphones to fridge freezers.

Any comments at all are greatly appreciated! :)

I have a video of the fault in action