A laptops screen can break for any number of reasons:
Physical Damage: It doesn’t take much to shatter the glass panel inside an LCD. If there are obvious cracks and sections of the screen that are unreadable then the LCD screen must be replaced.
Flickering Screen: Flickering can occur when the wire that connects the motherboard to the LCD becomes frayed/severed. This can be caused by poor wire placement within the hinge of the laptop. If you have to position the laptop screen “just right” to get an image, it is most likely the display wire. It’s possible for the labor charge to be more on a wire replacement because it could require the base of the laptop to be disassembled as well to replace it.
Very Dim Screen: If the LCD starts to get very dim or just seems to stop working, it could be a broken backlight or the inverter which powers the backlight. If you are still able to see the computer working properly if you examine it closely with a flashlight it is mostly likely a lighting issue. A broken backlight usually means the entire LCD needs to be replaced.