If your laptop's LCD screen is not displaying a picture, odds are you have a bad inverter board. The inverter board is your screen's most important component, second only to the screen itself. The inverter transfers power from the motherboard to the screen. Without a working inverter board, your laptop's screen will appear very dim, or it will display nothing at all. The good news is that you can replace the inverter yourself. The bad news is that you must both dismantle the display panel and remove the LCD screen.
Shut down your laptop. Disconnect all cables and/or external devices from the laptop. Remove the battery pack from its compartment on the bottom side of your laptop casing. It is never a good idea to work on any electrical device while it's still connected to a power source.
Open the display panel all the way. If possible, place the screen in the 180-degree position. Use a small, flat-head screwdriver to remove the rubber screw covers from the display panel's front cover. The front cover is the main plastic piece that conceals and protects the front side of the screen.
Remove all Phillips screws revealed by the rubber screw covers. Remove the front cover from the display assembly. You may have to use a small, flat-head screwdriver or guitar pick to pry the front cover from the display assembly.
Remove all Phillips screws from each side of the LCD screen. These screws fasten the screen to the metal framing inside the display panel. Grasp the top edge of the screen, tilt it forward, and then disconnect all video ribbon cables from the back side of the screen.
Locate the inverter board on the LCD screen. The inverter board will either be located on the back side of the screen or inside the front bottom edge of the screen. Remove all materials that fasten the inverter board to the screen. This is commonly a few Phillips screws or some adhesive tape.
Disconnect the cables from each end of the inverter board, then remove the inverter from the laptop and set it aside.
Repeat this procedure in reverse to install the new inverter board.
- Photo Credit laptop image by Jorge Figueiredo from Fotolia.com