No cameras or face ID after screen replacement on iPhone X

Hi All,

I replaced the screen on the iPhone X and now the cameras (front and rear) and face ID don’t work. The camera app is black when I open it. It shows the white button and last photo taken.

I don’t see any damage to the flex cable or connector on the board.

I’ve tried multiple other cables with the same result.

I reset the settings and updated it through iTunes.

I put the original flex back on the original screen and same result. I am not sure if face ID or the cameras were working before the repair. I normally check what is working and what isn’t, but I forgot to this time.

Do I need the device that copies the information from the old screen? Is that something that is just required now? If so, is there a solid option/place for that?

Any suggestions are greatly appreciated!

Thanks