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COMPUTER LCD BRIGHTNESS

My laptop recently had the lcd brightness dimmed below my comfortable preference. I thought the dimmness may be suitable for my sight but found out that I can hardly see what I am working on.
How can I increase the brightness on my lcd?

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  • Anonymous Dec 23, 2008

    COMPUTER LCD BRIGHTNESS problem

  • suhadiss Apr 30, 2009

    My Asus M5N also have same problems, can not increase the display brightness by using the function key.

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Go check your model # brand , and try to reemplace a LCD LIGHT DISPLAY INVERTER, it should be a small light bulb located inside of your lcd laptop

Posted on Dec 03, 2008

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Most laptops have their lcd brightness increasing when the ac is plugged in but it this is not in your case then i will advice you to look out for a sun labeled on your keyboard, there should be 2 of them one for increasing and one for decreasing so you can try that out.
if it helps please rate me

Posted on Dec 03, 2008

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Posted on Jan 02, 2017

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I have a lenovo t420 which has brightness/dim issue and can't correct it by unchecking the auto brightness


There should be a function key to adjust the brightness at the top of your keyboard my laptop is F2 or F3 so at the bottom of the keyboard is a key label FN The Function key looks like a sun with an arrow if you are lucky to have it labelled.
If this does not fix problem you may have a faulty laptop . There is a circuit called an inverter in your laptop that converts DC to a higher voltage AC to run the fluro backlight behind your laptop's LCD screen. If this inverter goes faulty you could experience the symptoms you are seeing. This would require a replacement of the inverter circuit board in your laptop by a repair service centre.
http://www.youtube.com/watch?v=fSCJzA0EBo0
http://www.youtube.com/watch?v=2Yi6GNFcP3w
http://ask.metafilter.com/92210/Backlight-or-Inverter-How-can-you-tell

Sep 05, 2014 | Lenovo ThinkPad T420 Notebook

1 Answer

My screen is very dim


boot to the BIOS (F2 at boot) and ensure that the LCD brightness is set to 8 and then reboot, if LCD is still dim, then, check the Control point system manager display settings and see if the LCD is dimmed there.
If no change, run diags Power + D at boot to run the LCD BIST test , if the 4 colored screens are DIM during the test, then the LCD has failed and needs repplacement.

Jun 29, 2011 | Dell Latitude E6500 Laptop

1 Answer

I cannot adjust the brightness on my Acer 5420-5687 laptop. The laptop had frozen so I unplugged it and took out the battery which reset the brightness. I tried using Fn key and holding the either sun...


I'm sorry my friend but seems your LCD monitor having problem. There are three options with your LCD monitor. Option 1: repair your LCD monitor *commonly problems are the LCD inverter*. Option 2: Replace LCD monitor with a new LCD monitor. Option 3: Instead using your dim LCD monitor plug CRT or LCD monitor external serve as your monitor. Have a nice day.

Jan 26, 2011 | Acer Extensa 5420-5687 Notebook

1 Answer

I have a compaq paserio notebook and when I boot up the computer, either I get a blank screen or I get a very faded image that I can't hardly see so I can't log on. Most of the time I just get a blank...


Have you checked the brightness options for the screen using the HP function keys? Fn +F7 or Fn+F8 should adjust the brightness of the screen for that C306 model laptop. If adjusting the brightness has no response then try the next steps.

What happens if you turn the computer off, plug it into an external monitor or projector, and then turn the computer back on? If the video displays correctly on a computer monitor or projector, but it stays dim on the LCD screen of the laptop, then the laptop LCD Screen Back-light or inverter is probably going out. You'll need to contact HP for a replacement part or take the laptop to a certified repair center.

Nov 05, 2010 | HP Compaq Presario C306US Notebook

1 Answer

Dim display


There is Video Driver update available in the Drivers/Updates page of the Computer model to fix this.

You can download the Update from this link

Please download and install the Update in the Computer. After installation, restart the Computer for the settings to take the effect. If the issue still persist, please try pressing the Fn/F6 Function Keys to change the Display brightness, as setting the Display brightness may cause the LCD to display dim.

Good luck..

May 25, 2010 | Sony VGN-CR220E/L Notebook

2 Answers

MY Laptop Screen Is Dim It Will Not Show Bright


When you say that your laptop "screen is dim", do you mean that there is no light coming from your screen, but you can see images on it? or do you mean that there is light coming from the screen, just a very little amount?

If you can images, but NO light is coming from the screen, then the LCD backlight is dead, and it needs to be replaced.

If there is light coming from the screen, but it's very dim, then you'll need to find the screen brightness adjustment keys on your laptop. This is usually two keys. The first one is normally in the lower left corner of your laptop and should be a different color - like blue or purple, and will be labeled something like "Fn". The second key is normally in the function key row (F1, F2, F3, etc...) and has a symbol on it that looks like a sun or burst of light with an arrow. There's usually one for "brightness UP" and one for "brightness DOWN". Hold down the Fn key, and then press the "Brightness UP" key a few times to see if the screen brightens up. Good luck.

Jan 14, 2010 | HP Pavilion dv1000 Notebook

1 Answer

I cant go through windows display, because the lcd monitor is already block out, but the lcd monitor is still functioning,, its total dimmed.? can you help me?


on my toshiba, there dual function F-keys. on mine a little 'sun-looking' brightness icon is on F6 (brightness down) and F7 (brightness up). at the bottom left is a key labeled 'Fn'. you need to hold this down while tapping whichever F-key on your Acer is labeled with the 'brightness up' symbol. try it- it may work!
good luck!

Oct 05, 2009 | Acer Aspire 4720 Notebook

2 Answers

The LCD screen on my Gateway M-6317 is dim. How


Press and hold the 'FN' key and tap the key that has the picture of a sun and an up arrow (or some other similar picture that dictates brightness - there should be two different keys that affect brightness one to increase and the other to decrease). Once you have the brightness set to your liking quit tapping the 'brightness' key and release the 'fn' key

Sep 29, 2009 | Gateway MX6447 Notebook

2 Answers

MY A100 LCD SCREEN IS VERY DIMM WHEN VIEWING DVD howto brighten


You can brighten or dim the LCD screen by pressing the Fn key plus another key with the a sun symbol eg the UP & DOWN arrow keys or one of the F3 to F12 keys - it varies depends upon the model of the laptop.
If you cannot vary the brightness of the LCD screen the you have a faulty backlight.

Connect an external monitor to the laptop and power it up, if you see a clear image on an external monitor, this means your video card is OK.

If you see a dim image or flicking image on the LCD screen it means you have a backlight problem.

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.

Mar 14, 2009 | Toshiba Satellite A100-S8111TD Notebook

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