LCD screen failure can be caused by any number of things. A bad inverter board is one of the most common causes. All laptop screens have an inverter board installed into the screen. It sends power from the motherboard to the screen's backlight. The backlight is a small bulb inside the LCD screen that allows you to view video and graphics. The inverter board and backlight work hand-in-hand. If your inverter board stops working, your laptop screen will appear dim or eventually go black.
1.Shut down your laptop using the operating system. Unplug the AC power cable from its socket on the laptop. Disconnect and/or remove all cables and external devices. Remove the battery pack from the bottom of your laptop. Most battery packs are secured to their compartments by one or two release levers.
2.Open the display panel as far as you can. Remove the rubber screw seals from the front cover of the display assembly. Remove all screws securing the front cover in place. Separate the front cover from the display panel with your finger tips. Some laptop models may require that you use a guitar pick or thin flat-head screwdriver. Remove the front cover from the display assembly.
3.Remove the Phillips-head screws from each side of the LCD screen. These screws secure the screen to the metal screen inside the display panel's casing. Grasp the top of the LCD screen and tilt it downward so the back side of the screen is accessible.
4.Disconnect all ribbon cables from the back side of the screen. Peel away any tape securing the cables in place. Lift the screen out of the display panel.
5 Remove the inverter board from the LCD screen and disconnect any cables attached to it. Most inverters are secured to the screen by adhesive tape or a few screws. It will be located inside the bottom edge of the display panel on the front or back of the LCD screen.
6.Place the new inverter inside the empty compartment inside the bottom edge on the front or back of the screen. Replace the inverter's securing tape or screws. Reconnect the power cables to the new inverter.
7.Place the screen back inside the display panel. Align the screw holes on each side of the screen with the screw holes on the screen's metal framing. Replace the screen's retaining screws. Replace the display assembly's front cover and its retaining screws. Replace the rubber screw seals.
8.Replace the battery pack. Reconnect all cables and devices. Turn on your laptop to see if the new inverter board works.
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