Question about HP Compaq Presario V2000 Notebook

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Laptop monitor my laptop monitor backlight does not work,what should i do

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  • shank1548 Sep 18, 2008

    I have the issue with the screen being very dark. After reading this thread I tapped the lid close button and it would brighten up just for a second and then dim again. If this is a lid closed sensor issue how hard is it to repair and/or how much does it cost to be repaired?

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Sometimes it isn't the inverter sometimes is is the sensor to detect whether the laptop lid is closed or not. Is there no display at all probally the inverter. If it is very very dark most likely the sensor. There have been a number of issue with this model in the V series that the sensor fails.

Posted on May 22, 2008

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You can get a replacement inverter from your local laptop repairer.
They are fairly exsy to fit up, but if you are even the slightest bit unsure, get them to do it for you.

Posted on Apr 18, 2008

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1 Answer

My laptop switches on but the screen isn't working. Is the backlight malfunctioning?


Hi. If you plug in an external monitor and the laptop works with that then yes, you probably have a backlight problem or the inverter is faulty (a small circuit that provides the high voltage for the cold cathode tubes of the backlight.)
HTH

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If I understand your question/statement , You see a "ghost image in the monitor? the backlighting is not working on the monitor? You didn't post the Model Samsung or the OS? It could be Backlighting, Inverter, Monitor, hard to say from my view? If you connect to a External Monitor it works? Take a look at this Video, perhaps it will give you a idea: http://www.youtube.com/watch?v=2Yi6GNFcP3w

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Monitor is dark. how to fix?


Walt, hold the Fn key down again, and tap once more on the Acer, F5, Display Toggle-Over key.

There are at least 3 display options available;

1) Internal display of laptop ONLY

2) Internal display of laptop AND external display

3) External display ONLY.

Were you just using the external display for more 'display real estate room', or was/is there a problem with the internal display of the laptop?

Was no problem? Is now? Even when using the guidance stated above for the Fn and F5 key?

Then if your laptop uses a CCFL for a Backlight, it also uses a screen Inverter. Screen Inverter is bad.

If it doesn't use CCFL/s for a backlight, and uses LED backlighting, replace the LCD screen.
The LED backlighting is incorporated in the LCD screen assembly, and you ain't replacing it.
Replace the entire LCD screen.

Post the laptop manufacturer name, and model number in a Comment. Model number is on Bottom of laptop.


Try to hurry as I'm going to a meeting with the head of General Motors, (Obama), and later with Bill Gates.





OH I'M JUST KIDDING!



Regards,
joecoolvette

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1 Answer

Display is dark


May be the backlight behind the screen is bad or the inverter power supply module that makes the backlight work. A good way to see if it is not the computer would be to obtain a monitor cable that you can plug into the monitor port on the laptop and then into a regular monitor. If you get a picture then you will need to determine what has failed in the laptop...if you do not get a picture on the external monitor, then there is a problem with the laptop itself.

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1 Answer

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You need to fix the boot manager problem first by connecting an external monitor to the laptop so you can see and do a system repair.

As for the backlight problem :-
You could have a faulty CCFL lamp or inverter, 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

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1 Answer

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This could be a faulty 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.

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1 Answer

No display


The LCD backlight is most likely faulty. If you look at the LCD screen to one side you could see a slight video image, provided the video card is working. To check if the video card is working connect the laptop's video output connector to an external monitor and then boot up your laptop. If you get an image on the monitor, then the problem is with the laptop's LCD display.
As I stated it could be the backlight or a faulty invertot that powers the backlight or it could be the cable/s that connects the LCD to the motherboard.
Try reseating these cables (requires dismantling the laptop).
If this doesn't work then you have a faulty LCD and needs to be replaced. Alternately if cost is too expensive, just use the laptop with an external monitor.

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1 Answer

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there will be power plan settings in the control panel... you'll have to modify it to have bright backlight even while working with battery...

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1 Answer

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 Hello jarkk, I believe your problem is with your backlight inverter. the hard drive should be installed for this process of checking it on an external monitor. with the hard drive removed it will not boot to the operating system. with the drive in, use the external monitor. if the monitor works when plugged into the external monitor plug, this will eliminate a bad video card. if the screen is still black on the laptop screen, replace your backlight inverter. the last case cenario is to make sure your backlights are not burnt out. 

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1 Answer

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This will give you an idea of what is involved in replacing the backlight. You can find a replacement backlight here, or on ebay, just take your current backlight(s) out, measure it or them, and buy replacements of the same measurements. It doesn't have to be for the same model laptop as long as the CCFLs (cold cathode florescent lamp) are the same size.

Aug 11, 2008 | PC Laptops

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