Is the touch screen not working correctly? i.e. being slow to respond, erratic or completely unresponsive Or has it got a Cracked Screen in this case it will look like a shattered window.
This part of the phone is also know as the Lens.
This repair is to replace both the outer touchscreen and the inner LCD screen. This is where the external screen is cracked or is no longer touch sensitive and/or the inner LCD screen is blank, white or looks like black ink is seeping.
Usually appears as a crack with bleeding black ink or as a white screen, Please see the more the information button for a picture of a phone with a faulty LCD.