Backlight it is an illumination from inside of your screen

Screen refurbishing means separating the cracked/smashed glass from the display and digitizer and replacing this glass with a new piece on top of the old display.

It is a glass replacement service, your screen must work. There shouldn’t be touch/ backlight issues or died pixels

Screen refurbishing is a glass replacement service only, your display must work. Screen Replacement means full new screen replacement.