ازاى تغيير back light lamp فى شاشات الاب توب

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.

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.

Removing tape from the backlight 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.

The circuit board has been unglued.

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.

Continue separating the metal frame from the plastic base.

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.

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

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.

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

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

The backlight cover has been removed.

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

Unroute the backlight lamp 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.


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

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.

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

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.

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.

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.

Read more: [ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]