They do have proper tools proper guidance menu and map too to fix LCD for each brand. If they remove any wire unknowingly then also they fix using the guidance menu.
they don't. LCD has liquid inside, and it is almost impossible to fix. It can be fixed, but it is so much more expensive than making them at the factory. They always just replace it with a new or refurbished screen.
They don't fix them, they replace them. Once a LCD screen has been cracked or otherwise damaged, it would cost more to fix than it would to replace the screen.
