Blank Laptop Screen - Does a Dark LCD Screen Indicate a Faulty Backlight? If your laptop screen is not completely dark or black - i.e., you can still see the desktop faintly - then it could be an inverter failure or a defective backlight.
In most cases, it's a failing backlight rather than a failed inverter.
If you see intermittent bright images on your screen with pinkish tones then it's definitely the backlight. You can replace it cheaply for $6-12 with parts from Ebay or other LCD repair stores.
Make sure you get a backlight with the connector attached
to it so that you can plug it into the inverter board.
Source Website http://LCDMonitorRepair.annics.com
When a laptop screen goes blank, one of the problem areas is a faulty backlight. To what extend does this affect the screen display, varies...