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Backlight out on one side - Philips Televison & Video

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The back-light inverter board to that side should be replaced.

Posted on Jan 17, 2013

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Posted on Jan 02, 2017

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No back light


Hello
If sound output is OK, and there is no picture, the fault is with backlight section itself. Check its backlight CCFL lamps, and backlight inverter board for fault. This is the picture of the backlight inverter board to your TV. It can ble located at the left side of the display panel. There is norepair to this bard other than repalce it with same type and number. Before replace it, check whether proper voltage comes to it from the main power regulator board.2_16_2012_4_51_14_am.jpg

Feb 15, 2012 | Westinghouse Electric VR4085DF TV

1 Answer

You can hold a flashlite to see the screen, i was told it might be the light bar or inverter can you plz tell me what the problem is before i spend to much money


Ok if you can see the image when you show a flashlight to it means that the backlight is not working, it could be a simple problem as the backlight power cable loose inside or in worst case the backlight completely damaged. Best to take it to a service center and they will be able to tell you what happened. Hopefully it's just a loose cable.As LCDs do not produce light themselves they need illumination (ambient light or a special light source) to produce a visible image. Backlights illuminate the LCD from the side or back of the display panel.Backlights are used in small displays to increase readability in low light conditions.You can search for info on Backlight to learn more about it.

Jan 25, 2011 | Computers & Internet

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My screen on my laptop just went all black with a very faint image. what is wrong there, how do i fix it, and what made this happen?


A) What is wrong?;
Your Backlight has gone bad, or the Inverter.

B) How do I fix it?
Replace the Backlight bulb, or the Inverter

C) Backlight bulb's, and Inverters, like everything have a 'lifespan'
This one is at the end of it's. (Stating the Backlight or the Inverter

From here all I can give you is Generic information, since I do not have the laptop manufacturer name, and Model Number. This is on the bottom of the laptop.

1) An LCD screen cannot produce enough light by itself. A Backlight bulb, (Or more than one), is used to emit enough light.

2) A laptop cannot produce enough power to power the LCD screen, and is also used for power to the Backlight.

I'll have to discuss the way the Display Assembly is put together, and name parts in order to explain the following of how to repair. Again, generic information.

1a) The plastic top of the laptop is the Top Cover. There are different names used by different manufacturers.

1b) Looking at the LCD screen with the laptop open, there is a plastic frame that goes around the edges of the LCD screen, and is in Front.
This is the Display Bezel

1c) The LCD screen is behind the Display Bezel. The LCD screen is a composite of layers. The outside layer that faces you is a protective screen.
Around these layers composing the LCD screen, is a metal frame.
One side, (Or both sides) of the metal frame is removed to access the Backlight bulb.

1d) The Backlight bulb is a CCFL.
Cold Cathode Fluorescent Lamp.
Very similar to the fluorescent lamps, (Bulbs) uses in residential, and commercial applications, but on a MUCH smaller scale.

Now to show you generic laptop info on replacing the Backlight bulb for them.

A) http://www.insidemylaptop.com/category/backlight/

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

If I had the laptop manufacturer name, and Model Number, I could try to give you a link to the Service Manual for the laptop. (Free. Usually from the laptop manufacturer)
This way you would have Exact info on how to disassemble your laptop's Display Assembly.
Post in a Comment.

Oct 13, 2010 | Computers & Internet

1 Answer

Casio F91W-1 Wrist Watch- backlight color


You can change the backlight on a casio wristwatch by holding the Light button, but only if it has an LED light in the side of the screen such as yours does. There is Light Blue, Red, Pink, Blue, Green LEDs in the side of the screen and you can change between them. There is also an option that flashes between all the LEDs when you press the button.

May 06, 2010 | Casio F91W-1 Wrist Watch

1 Answer

Acer aspirw 5100 brightness


1.The Function key (Fn), and the F6 key are pressed to turn the Backlight off to conserve power.

2.The Fn key and the right side arrow key, are pressed to increase Brightness.

You have a TFT LCD monitor screen. (Thin Film Transistor)
The LCD screen cannot be seen clearly without a Backlight.

The Backlight is a CCFL. Cold Cathode Fluorescent
tube. Resembles a small fluorescent tube used in residential, and commercial lighting.

The Backlight can go bad after time, and weaken.
If so, it will have to be replaced.

Sounds easy, it isn't.

The TFT LCD monitor screen is made up of layers. It's enclosed in a thin metal frame. Resembles a picture frame.

The frame is removed, after removing the LCD screen from the laptop's top cover.

The LCD screen transparent outside layers, are separated partially from the rest of the LCD screen.
The Backlight is removed out of the side.

This gives you an example of removing, and replacing an average Backlight,

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

Recommended job for a pro.

Dec 28, 2009 | Acer Aspire 5100 Notebook

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

Laptop stain


The backlight of your laptop starting to produce a black color on the end of flourescent lamp. Thats the sign of burning mercury on the backlight. You need to replace the backlight asap, before it becomes dead. Otherwise you gonna have a black screen if the backlight dead already.

Jul 24, 2009 | Computers & Internet

1 Answer

"melting" screen image


the problem is the backlight not lit evenly.
have the backlight inverter board checked for correct ac ht and if that is okay then u will have to replace the backlight.

Jul 10, 2008 | Polaroid Televison & Video

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