In this guide I will disassemble a laptop LCD screen in order to remove and replace the backlight lamp (CCFL).
Replacing the backlight lamp is not an easy task even for experienced technicians. If you do something wrong you will permanently damage the LCD screen and have to buy a new one. Proceed on your own risk and do not blame me. :)

Some recommendations before you start:
1. Work in a clean room. You don’t want dust and lint inside your LCD screen.
2. Make notes, so you know how to assemble your screen back.
3. Take pictures.
4. Before you remove something, take a closer look at the part and memorize how it is assembled.
5. When you are assembling the screen, remove dust and lint with compressed air. Do not use cloth.

The backlight lamp (CCFL) is located inside the LCD screen, so we are going to take it apart. In this article I’m not going to explain how to remove LCD from a laptop, it’s been covered before.

LCD screen with bad backlight lamp

Remove sticky tape and foil from the back of the screen and glue it somewhere so you can reuse it later, when you assemble the screen.

Remove tape

Removing tape from the backlight cables.

Release backlight lamp cables

On my screen the green circuit board was glued to the plastic frame with a double sided tape. Carefully unglue the circuit board. Be very careful, do not flex or bend the circuit board.

LCD circuit board

The circuit board has been unglued.

Remove circuit board

Place the LCD screen on the side and start removing the metal frame witch secures the LCD to the plastic frame. There will be many latches on all sides of the frame, you can unlock them with a small screwdriver.

Open latches

Continue separating the metal frame from the plastic base.

Separate LCD frame

On the following picture you can see that frame, LCD with the circuit board and screen base have been separated. Be careful, do not touch internal components with your fingers. Handle all internal components by the sides.

Remove LCD

Place the metal frame and LCD with the circuit board aside. You’ll need them only when you assemble everything back together.

LCD

There will be a few transparent layers inside. Carefully remove them from the screen base. Do not separate the layers, just put them aside together.

Transparent layers inside screen

Keep everything organized, so you have no trouble assembling the screen.

Set aside

Start removing the metal cover from the backlight lamp (CCFL).

Remove backlight cover

The backlight cover has been removed.

Backlight lamp cover

The backlight lamp (CCFL) cables are routed through small plastic hooks.

Backlight lamp cables

Unroute the backlight lamp cables.

Release backlight cables

Now probably the hardest part in this disassembly process – removing the backlight lamp and reflector. The backlight lamp is secured inside the reflector so you have to remove both and then separate them.
Before you remove the backlight lamp and reflector take a closer look how it’s assembled and mounted to the screen base. Fitting the backlight and reflector back in place could be a very challenging task.

Remove backlight lamp reflector

The reflector is glued to the screen base with a double sided tape.

Backlight reflector

After the reflector has been unattached from the screen base, you can start removing the backlight lamp. As you see on the picture, I marked the left side of the reflector with a red dot so I know where the red cable goes when I assemble everything back together.

Remove backlight lamp

The backlight lamp (CCFL) has been removed from the reflector.

Backlight CCFL lamp

In order to access the backlight lamp leads you’ll have to remove the rubber caps from both side of the lamp. I’m not sure if you can touch the backlight lamp with your fingers, so I would use rubber gloves.

Remove cover

Cabled on both sides of the backlight lamp are soldered to the backlight leads. In order to access the leads you’ll have to remove the black insulator on both side of the lamp.
Unsolder both cables from the old backlight lamp and solder them to a new one.

Cable soldered to backlight lamp

You can test the new backlight lamp (CCFL) before you install it back into the screen. Connect the backlight lamp into the inverter board and turn on the laptop. The backlight lamp should light up.
From my experience, on some laptops the backlight lamp will not light up until the video cable is connected to the LCD screen. In this case you’ll have to assemble the LCD screen and then test it.

Test backlight lamp

Support this site.

 

270 Comments

Pages: « 2711 10 9 8 7 6 5 4 3 [2] 1 » Show All

  1. 20
    Haluk testereci Says:

    Since Toshiba claimed they can just change whole LCD instead of backlight bulb and asking US$ 702, you see right US$ 702 for LCD panel…SO i have nothing to loose other than try above replacement which gave me courage to do so..Thank you very much for nice detailed work and demo done above…with my best regards

  2. 19
    loop Says:

    Very comprehensive guide… I’m thinking about changing my ccfl too, although it hasn’t conked out yet, but it has become rather dim over time.
    Thx to this guide I might give it a try.

  3. 18
    jason Says:

    i recently replace my backlight, but in the process i dirty up the optical layer that spread the backlight, can i clean it, if i can how.. and if i can’t where can i get a new optical layer.

  4. 17
    Aparna Says:

    Can you tell me, where to look for the CCFL backlight. Apparently no one in Bangalore, kolkata, India stores these backlights.

  5. 16
    Mohd Nayeem Says:

    Excllent Guide to Replace the FLOROSENT LAMP.

    Thanx a lot……..

  6. 15
    d santonia Says:

    thank you! the warranty on my son’s computer ran out in nov.
    using your directions he replaced the backlight lamp.

  7. 14
    Computer Repair Guy Says:

    Very helpful website. A good resource for end users and no doubt some professionals as well.

  8. 13
    cj2600 Says:

    Seramar,
    I think for test purposes you can use any working backlight lamp.
    I have only two working backlights with different connectors for the inverter board and I use these backlights all the time. I’ve been using my lamps with many different laptops (with different LCD sizes) and never had any problem.

  9. 12
    Seramar Says:

    Forgive me if you mentioned this elsewhere or another reader already asked but when testing the backlight as you do on this post and troubleshooting-laptop-with-backlight-failure must you use the backlight specific to the model you are working on or can you use any backlight? We have plenty of working, spare backlights available at the shop where I work but not necessarily all of the models we use regularly.

    Thanks :)

  10. 11
    cj2600 Says:

    Nathan,

    the lines are rather severe, and it sometimes brighens up to a white screen

    sounds like a problem wiht the LCD screen.
    You’ll find more tips for troubleshooting bad images on LCD in this post:
    Laptop has bad video on the LCD screen. What is wrong?
    By the way, did you test the laptop with an external monitor? Video on the external monitor is fine?

Pages: « 2711 10 9 8 7 6 5 4 3 [2] 1 » Show All

Leave a Reply