Chosen Solution

I changed my screen on iphone 6 plus, because it cracked once. Updated to IOS 10 (like 4 months ago) since then continuously get error 9, 14, and 2009 tried to fix at store , they swapped ic flash power but still iphone crashes may the error be related to (probably non genuine) screen replacement? Can’t update or restore at all… Update (06/12/2017) Hi ben, thanks for the more detailed answer… so what to do , should i attempt to fix it myself, and loosen up the screws? thanks…

It’s probably long screw damage from putting too long screws or overtightening the screw holes on the board. The screw holes in particular are the 3 out of the 5 lower screw holes for the metal cover that goes over the screen connectors on the logic board. This is hard to spot without a microscope in the screw holes.

Board issue, you need to find someone with board repair skills.