so freaking weird, even if you change only the cable between the display and the motherboard the phone knows and stops working properly. how do they even do that ? I assumed the cable doesn't have any logic or chips in it.
The video is kind of vague about it, but when they are talking about "replacing the cable" they mean replacing the whole thing. The display obviously includes lots of logic that, among other things, stores display's serial number. Same with the sensors mounted on the display.