5C bad drop no touch/copy screens do not work

Hello,

Apologies if this has been answered before but I couldn't find anything that quite matched my problem.

Got in a 5C to recover the data after a bad drop, touchscreen didn't function and there were very faint white vertical lines through the LCD. I tried a new screen, and was presented with a dark blue image (as if not connected correctly). I reseated etc and tried two more screens all of which had the same problem. These screens work on other phones. The original screen still has the same issue if plugged back in. Taking a known good genuine screen from another 5C presents the same problem as the original screen. To summarise : copy screens don't work and genuine screens have no touch on this phone.

I've tried disconnecting the battery and all the obvious solutions. I peeled off the black tape and have examined every component around the connectors and everything appears to be okay. Phone is not water/liquid damaged in any way.

Thanks in advance,

Sam