it can be a false contact in the flexible ones, I leave you a video, nothing is understood but on the end it looks like it is diagnosed and how it resolves
https://www.youtube.com/watch?v=OjcqxtYFsgE&t=2s
but try this practice
I will indicate a practice, always very carefully and fiddles with the unplugged TV
try disconnecting one of the two flexes that go from the t-con to the display and test if you have an image in the middle of the screen, if this does not happen connect it (eye, well connected) and disconnect the other and try again, if you see image in the middle of the screen is the bad display, I can indicate a practice to solve it in the best case