iPhone 6 plus touch only work with original screen

I am serving a customer who has had trouble at another repair shop, the case is an iPhone 6 Plus. The technician switched the screen, had problems with the touch after a few minutes of the exchange, changed again by other models and continued the same problem.

It arrived in my store, I made a change too, gave the same problem, I know it is not the screen because the first screen I changed and gave problem, I sold to another client and it is working perfectly, It is in this iPhone in specific. I noticed that some screws from the board that protects the cables do not seem to be the originals, are they?

Oh and as I mentioned in the title, if I put the original screen again, everything works perfectly.

I've done system restore, but so far nothing.

UPDATE:

After i removed the metal shield that protect the cables, work for a while but still getting error.

And if i reset the phone (home + power for 10 sec) it comes to work again..

and loops error again haha