Chosen Solution
Its either a cable issue, board issue or software (you are not running any beta software are you?) However its almost definitely not software but hardware is the issue. Usually I would say to open it up and see whats wrong inside but repairability wise the pro is 2/10 and the screen breaks easily upon removal. I doubt its even a visible issue that you could see by taking the screen off anyway. New pro screens are also pretty expensive. It more likely than not is a logic board issue. Try sending it to Ross man Repair Group in NYC, they are the best in micro-soldering/diagnostics so no matter the situation they should be able to fix it. They are relatively cheap as well. I think this should just be marked as unsolvable on here and sent to professionals.
