Question about Fujitsu LifeBook S-4572 Notebook

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No Screen Backlight for Fujitsu Lifebook S04572

LCD screen has lost backlighting and brightness. Are any parts available (inverter, entire screen module, etal) and at what price? Would love to continue using this workhorse despite its 6+ years age. One of the threads suggests that replacing the inverter (which I assume provides the power for the light source) is very difficult, not worth the effort, and recommends entire screen replacement. This is a 12.1' screen.

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D505 replacement screen has not solved the backlight problem


The drive voltage from the motherboard to the input of the inverter board is missing which in turn drives the backlight, trouble is you will need a service manual to track the problem. Try www.dell.com for customer support and the technical department, they may be able to provide answers.

Jul 01, 2012 | Dell Latitude D505 Notebook

3 Answers

When i starts my laptop, i can see black screen. in bright light, i can read littlebit but now clearly. can you please tel me whats wrong? what i need to do?


If I had your laptop model I could point you to the exact part. It is a bad LCD inverter. It is a small tube shaped circuit board located under the LCD screen behind the screen bezel. One end connects to the LCD data cable, and the other end has a 2 pin connector that goes to the LCD backlight bulb. The part is usually about $10-15 and is relatively easy to replace yourself. Remove the screws on the bottom of the screen bezel and carefully pull the bezel out toward you. You will see the inverter there. Unplug both ends, replace with the new one and re-assemble. cheifhoho.jpg

Apr 08, 2011 | Computers & Internet

1 Answer

Screen is to dark. cannot see letters very well.


Suggest you press the Fn key And the key to increase brightness, first. (Should be a key that has a sun icon on it)

Barring this does not increase the visibility of your LCD screen, the I suggest the Backlight is bad, or the Inverter.

The Backlight is a type of CCFL tube (Cold Cathode Fluorescent Lamp) mounted to the LCD screen. The LCD screen needs the light given off of the Backlight.

Replacing the Backlight is a daunting task, and if done wrong, will cause possible damage to the LCD screen.

The LCD screen itself has a thin metal frame holding the components of the LCD screen together. This frame must usually be opened on the side that has the backlight, to access the backlight. The components that make up an LCD screen are fragile, and can easily be damaged.

The Inverter supplies power to the LCD screen, as well as the Backlight.
Inverters do go bad, but commonly it's the Backlight to go first.

This shows a typical Backlight replacement. It IS not an advertisement to attempt this yourself, but a reference tool for information.

http://www.laptoprepair101.com/laptop/2007/12/09/replace-laptop-backlight-ccfl-lamp/

Nov 16, 2009 | Itronix GoBook III Notebook

2 Answers

I have a Fujitsu Siemens Lifebook s7020 with no backlight. The display is showing everything but it's hard to see because there's no backlight. Everything is also fine with an external screen. I have a...


The Inverter board must be tested and eventually replaced. The inverter is the small board located at the base of display. This is connected to one side to the backlight lamp, to which supplies AC high voltage, and on the other side to motherboard, where receives DC voltage.

Inverter contacts to otherboard and to lamp must be tested , using a multimeter to read volts. The inverter is an AC board, and for safety reason the test must be done by a trained repairer.
If the inverter is OK check the contacts to motherboard and wiring harness to motherboard..

Also ensure that light is not just dimmer because energy save mode is on, or because the laptop is running on batteries.

Sep 07, 2009 | Fujitsu Siemens LifeBook S7020 Notebook

1 Answer

Lifebook S7020 No backlight


Take the laptop to your nearest computer repair shop to have the inverter replaced.

It is situated underneath the LCD panel and converts DC electricity to AC to power the backlight of the LCD.

This shouldnt cost much to replace - around £40/£50

Aug 06, 2009 | Fujitsu Siemens Computers & Internet

1 Answer

My notebook (Fujitsu Lifebook S6000 series) screen back light just died. How do I fix it and what type of backlight do I need to get?


You most likely have a defective screen - a defective inverter or a CCFL lamp or simply the video cable needs reseating. After reseating the video cable and the problem is still there then :- To determine if you have a LCD screen or video card problem, read this and follow the instructions. Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case. The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills. Check out www.lcdparts.net for parts, repair service and DIY info.

Jun 04, 2009 | Intel S6240 Notebook

1 Answer

Display of the Laptop is not coming at all


You could have a defective screen - a defective inverter or a CCFL lamp.
To determine if you have a LCD screen or video card problem, read this and follow the instructions.

Defective CCFL backlight, it may have the following symptom:
  • Screen flashs on red/pink and off.
  • Picture stays on in red and slowly be come normal.
  • Picture flickering with dim display or appear black.
  • Picture flickering on and off.
All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp

Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight.

Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out www.lcdparts.net for parts, repair service and DIY info.

May 15, 2009 | Fujitsu Siemens Lifebook C2230 Notebook

1 Answer

Wont completley load up just ends up to a blackscreen


You could have a defective screen - a defective inverter or a CCFL lamp.
To determine if you have a LCD screen problem, read this and follow the instructions.

Defective CCFL backlight, it may have the following symptom:
  • Screen flashs on red/pink and off.
  • Picture stays on in red and slowly be come normal.
  • Picture flickering with dim display.
  • Picture flickering on and off.
All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp

Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight.

Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out www.lcdparts.net for parts, repair service and DIY info.

Apr 22, 2009 | Fujitsu LifeBook A3040 Notebook

2 Answers

Display problem dell c600


I've also had that, The FN and brightness I've not determined, as I changed LCD panels, however, components in the LCD screen can be swapped out, cable and inverter and backlight (<-very hard to do!!) and the ATI graphics board is mounted to the mainboard, for the C600 they are affordable

Dec 20, 2008 | Dell Latitude C600 Lcd LCD Display

1 Answer

ACER ASPIRE LCD TROUBLE!!


If the screen appears dark with only a faint image or picture and the brightness can't be adjusted then it is likely that the screen backlight is not on - the backlight is like a very thin flourescent tube that runs along the bottom of the screen and provides the illumination. The backlight tube may be faulty or the small electronic inverter unit that powers the backlight tube may have failed. Occasionally the backlight is off because the little switch that is used to detect the screen lid being closed is broken or stuck in. If your backlight is faulty, some engineers will replace it - but it is more common that the entire screen is changed. If it is the inverter they can usually be replaced from ebay.

Mar 15, 2008 | Acer Aspire 1304LC PC Notebook

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