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Laptop display backlight turns off

Backlight on the LCD screen shuts off after 5 seconds

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  • Contributor
  • 11 Answers

Check and change the display inverter. backlight problems are related to invereter.

Posted on May 13, 2013

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6ya6ya
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Posted on Jan 02, 2017

  • 4 Answers

SOURCE: lcd display

REPLACING A INVERTER ON THE HP 1040US MODEL. STEP BY STEP INFO PLEASE.

Posted on Dec 15, 2007

Demmy
  • 59 Answers

SOURCE: Backlight of LCD turns off

Hi,
For latitude systems they have this ambient light sensor. it basically adjusts the brightness of the screen depening on room lighting. try to go to bios by hitting F2 on the dell logo. go to video and try to look for ambient light sensor. however, im not sure if your computer has that feature I have a second option for you though. based on the troubleshooting you've done, it seems that the video back lighting is affected by movement. it would be a good try to reseat the LCD cable. you can use this link to guide you in fixing the computer : http://support.dell.com/support/edocs/systems/latd505/sm/keyboard.htm
all you need to do is to take out the keyboard with 2 screw holding it in place. the LCD cable should then be accessible. it a thick cable that coming out of the Left hinge.

Hope this helps.

thanks.

Posted on Dec 25, 2007

  • 18 Answers

SOURCE: backlight

If you are running windows, you might have to re-install your operating system, if that doesn't work, you might be having a bad system board and or memory.

Posted on Jun 10, 2008

  • 8 Answers

SOURCE: The screen still displays the image but the backlight if off

The problem is in fact the backlight as you are saying but i am not sure if it is the wiring to the power supply or if your backlight is just burning out. You can ask the company if you can send it in for them to look at it.

Posted on Feb 14, 2009

pgh_pa_guy
  • 2992 Answers

SOURCE: Backlight wont stay on

The inverter board which provides the backlight power isn't working properly. This is a pretty common problem with LCD screens. The inverter is in the display, mounted under the display panel. It's a fairly simple job to replace the inverter. You have to remove the screws holding the front of the display to the back and separate the pieces. The inverter is held in place by a couple of screws and has a couple of cables connecting it to the main board and display panel. Unplug those, remove the inverter, mount the replacement and plug the cables back in. Then reassemble the display. A search on Google for "acer 5315 inverter" turned up several sources for the replacement part. Here is one. I don't know anything about this seller; I just picked it as an example.

Posted on May 19, 2009

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My hp dv600 when powered up looks normal but if i give it a few seconds the screen goes black and wont come back i shined a light and i do have picture but no light maybe ballast?


alejandro,

An LCD screen cannot produce enough light by itself. It needs an additional light source.
A Backlight is the additional light source.

A Backlight is a CCFL.
Cold Cathode Fluorescent Lamp.
Very similar to the Fluorescent lamps, (Bulbs), used in homes and businesses, but on a MUCH smaller scale.

HP Pavilion dv6000z series Notebook PC, is a general series designation. The EXACT model number is on the bottom of the laptop in a white Service Tag.

The HP Pavilion dv6000z series of Notebook PC's used either an LED or CCFL type of Backlighting.
Depends on which model it is.

http://www.screentekinc.com/backlight-ccfl-led-explained.shtml

As stated in the above information a Backlight is mounted in the back, or on the side of the LCD screen.
The LCD screen is composed of layers. These layers are held together by a metal frame which emulates a picture frame. If the Backlight is a side unit it will be held in place next to the layers, and inside the metal frame.

[Which means the LCD screen's metal frame, (LCD Panel Frame), needs to be opened on one side.
This will leave the layers which compose the LCD screen loose. The layers MUST be held in the proper placing when changing out the Backlight. Not an easy job to accomplish]

An Inverter is used to change the power coming from the laptop, to be used by the LCD screen, and Backlight.
90 percent of the time the problem is the Inverter.

The Inverter for the Pavilion dv6000z series of Notebook PC's is located inside the Display Assembly.

The Display Assembly is the
1) Display Enclosure Cover, (Plastic top of laptop),
2) LCD screen,
3) LCD Panel Frame, (Metal frame around LCD screen),
4) Display Bezel, (Thin plastic frame which surrounds the LCD screen in the front)
5) Camera Module
6) Inverter
7) Display Enclosure Cover Hinges (2)
8) Display Enclosure Cover Hinge Covers (2)
9) Wireless Antenna Transceivers and Antenna Cables
10) Microphone receivers and cables
11) Various mounting screws

[The Top Cover for a Pavilion dv6000z series Notebook PC is essentially the Palm Rest. The cover under the Keyboard]

With the Display Bezel removed the Inverter is located at the bottom.
(Display Assembly removed from laptop first)

HP Support > Pavilion dv6000z Notebook PC series> Manuals>Service Manual>

http://h10025.www1.hp.com/ewfrf/wc/manualCategory?lc=en&dlc=en&cc=us&lang=en&product=3224052&

One example of an Inverter for an HP Pavilion dv6000z series Notebook PC,

http://www.amazon.com/DV6000-DV9000-V6000-INVERTER-AS0231721C1/dp/B00480MXUS

Please post additional questions in a Comment.
Regards,
joecoolvette

Jun 11, 2011 | HP Pavilion dv6000z Notebook

1 Answer

My screen is totally blank. how can i diagnose what's wrong?


A) Suggest you start with seeing if graphics are being shown, but not displaying on the LCD screen.

May be an Inverter problem.

1) Laptop on, use a flashlight, and shine it at the LCD screen. Shine the flashlight at an angle.

Do you see faint images?

2) Laptop off, plug in a VGA monitor to the VGA connector on the back of the laptop. Turn the VGA monitor on, and turn the laptop on. (Do NOT have the laptop running, and plug the monitor into it)

This is what a VGA connector looks like,

http://en.wikipedia.org/wiki/VGA_connector

(Photo to the right. The VGA monitor cable's connector is shown to the Left)

Press the Fn key, hold it down, and press the key that toggles over the graphics to an external monitor. The key will have a monitor icon symbol on it. (Empty rectangle)

Do you have graphics on the External monitor?

1) expounded on:

An LCD screen cannot produce enough light by itself.
For this reason an additional light source is provided.

A Backlight is the additional light source.

A Backlight is a CCFL.
Cold Cathode Fluorescent Lamp. (Lamp = Bulb)
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

An Inverter is used to provide power for the LCD screen, and the Backlight.

The laptop's power is not enough to power the LCD screen, so the power is increased for the LCD screen by the Inverter.

The power from the laptop is too much for a Backlight, so the power is decreased for the Backlight by the Inverter.

90 percent of the time the problem is the Inverter, not the Backlight.
An Inverter is a small circuit board located within the Display Assembly.

The Display Assembly consists of;
1) The top panel of the laptop that you see with the laptop closed.

2) The LCD screen (Assembly. More on that in a minute)

3) The Bezel. The thin frame in front of the LCD screen, that surrounds the LCD screen. Looks like a 'Picture Frame'

4) The metal frame that holds the LCD assembly together, and it's screws.

5) The brackets that are screwed to the LCD assembly frame, and then the brackets are screwed to the top panel.

6) The Inverter. A small circuit board, (Usually as long as your longest finger, and about the same width), located BEHIND the Bezel, and at the bottom of the LCD screen

7) Wireless Antenna

8) Backlight. Description already provided. The Backlight is inside the metal frame that surrounds the LCD assembly. On one edge. (Sometimes more than one Backlight is used)

The LCD screen is an assembly. What you see on the outside is a protective screen.

If I may;

http://solutions.3m.com/wps/portal/3M/en_US/Vikuiti1/BrandProducts/secondary/optics101/

This is an example of an Inverter for an Everex Stepnote VA4300M,

http://www.laptoprepairparts.com/html/details.asp?ref=1048&category=inverter

I await your findings. Post in a Comment.
Regards,
joecoolvette

Nov 20, 2010 | Everex StepNote VA4300M Notebook PC

1 Answer

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

2 Answers

Screen went black...audio still working..Shuts off after 5 seconds..LG 32lcd7d 42" flat screen


Ur LCD inverter backlight board is dead.Replaced this LCD inverter backlight board.U will get ur picture back.Tries websites Shopjimmy.com,Ebay.com to buy a refurbish LCD inverter backlight board for the replacement.It a long board in shape.

Mar 15, 2010 | LG 32LC7D Television

2 Answers

Acer 5810t laptop. screen gone black


Press and hold the Power button for 45 seconds to turn the laptop off.

Then, remove the battery from the battery compartment and clean the metal contacts.
Next, reinsert the Battery and try to turn it ON.

If the display still doesn't come then you may try connecting an external display to check if the Computer is able to produce display and the issue is with the backlight of the LCD screen.


wish u good luck!!!!!!!!!!!

Sep 17, 2009 | Computers & Internet

1 Answer

Monitor keeps shutting off after a few seconds- hp dv4000notebook


You may have a 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 the monitor up first then the laptop, 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

Sep 09, 2009 | HP Pavilion dv4000 Notebook

1 Answer

Laptop LCD goes black after a few seconds


Hello,

Yes, The pink tint is an indication that the backlight is failing. Now the backlight is basically dead, the best way to get back going is to do an Ebay search for your model laptop and get a new screen. Most screens can be purchased for around $50.00 - $70.00 and they are very easy to swap. Email me if you need more info.

Buddy
Corporate Computer
www.ccl-la.com

Aug 03, 2009 | Samsung SyncMaster 940N Flat panel Monitor

1 Answer

Lcd screen d600 backlight turns off after 1 second


You could have a faulty inverter or a CCFL lamp, To determine if you have a LCD screen, inverter or video card problem, read this and follow these 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 the monitor up first then the laptop, 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.

Jul 03, 2009 | Dell Computers & Internet

1 Answer

Acer 5515 backlight problem


Defective CCFL backlight may has 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 03, 2009 | Acer Aspire 5500 5570-2609 Laptop

1 Answer

Sony KDL-32ML130 lcd tv


Not really that tough. Sounds as though the backlight is shutting down, either from a power supply failure, or a failure of the backlight circuit itself. You can verify this by holding a flashlight to the screen in the area where the menu usually appears to see if it displayed on the LCD panel with no backlight. If you can faintly see the menu displayed, your backlight has shut down and the most likely cause is the backlight inverter board, followed by the power supply and the backlights themselves which are part of the LCD panel. If you found this information answered your questions, please be sure to rate it. Thanks!

Oct 24, 2008 | Televison & Video

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