How To Replace the Backlight Of Your LCD/HD Screen At Home

Written By Sam on 28 November 2012
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LCD and other HD screens have a filtered light system which generates images on the screen. The light system is located in the back of the display. It’s important to know how to repair it if the ‘backlight’ stops working. You can repair it yourself, without having the need to call in a professional. Read on for more details.

To see if there’s a problem with the backlight of the screen, turn it on. Now stand at a 1 inch distance from the screen and look directly into it. Block out the light in the room by cupping your hands around the face. This is to get a clearer view of the LCD screen. Next, you should check if there’s a faint light visible in the screen. If it is, this means the backlight has gone out, and you should replace it with a new one.

Here are the steps you can follow to fix this problem at home:

1. Open the back

First of all, you would have to unscrew all the screws located on the back of the screen TV/monitor. The screws can be found around the borders of the back casing. The number of screws will vary depending on the type of screen you’re using.

You have to gently lift the back panel off the screen. To expose the internal components of the screen, remove any metal sheeting located underneath.

2. Remove the backlight

The backlight can be best described as a long, thin tube with light bulbs in the clear plastic casing. To remove the backlight from the screen, cut into the end of the plastic casing near the end where the lead connectors of the tube attach the plastic case. Make sure you do this in a proper ventilated area and with the help of a dremel tool.

3. Do some heating

Use a blow dryer to heat the area where the wires of the tube go into the plastic casing. Once the glue responsible for holding the wires is hot to a certain extent, pull the tube and wires. The tube shouldn’t be damaged as the presence of the mercury vapor can cause health risk. This step has to be performed in a proper ventilated area.

4. Place the new backlight

The last step involves unscrewing the reflector strip and remounting the new backlight (LED or ccfl). This is to be done in the same way as you removed the old backlight in the previous step. After that, the reflector strip has to be refastened to the screen. You can now secure the old screws back to their appropriate places.

Through these steps, you would be able to replace the backlight on your LCD or HD screen at home.

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