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My laptop screen is very dark, why? - HP Computers & Internet

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Hi,

Common cause of this problem is either the CCF (cold cathode florescent) lamps or the inverter that powers them is failing or has failed. This would involve opening the display panel casing, exposing the internal and performing further diagnosis. This of course would require a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Sep 08, 2008

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Why is there no display?


hi

can you plug in another monitor to the video plug on the side of your laptop?

if the monitor works but your laptop screen stays dark your laptop screen needs to be replaced .

If the monitor is also dark then the LCD screen is ok but the inverter needs to be replaced
25717570-m35oz4jvdfvvmght4a51n0jl-5-1.jpg lcd connect to laptop
25717570-m35oz4jvdfvvmght4a51n0jl-5-3.jpginverter
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Dell Inspiron 1525 laptop screen goes dark


Hey Lea,
Try the steps below to see if they will resolve this issue that you are having with your computer. If this does resolve the issue you can email me. My email address is listed below in my sigfile.

1) UNPLUG THE LAPTOP
2) REMOVE THE BATTERY
3) HOLD DOWN THE POWER BUTTON FOR ABOUT 30 SECONDS TO 2 MINUTES
4) THEN PUT THE BATTERY BACK IN
5) START IT UP..

Thank You,
Dell-Jesse L
Dell Social Media and Communities
email jesse_leonard@dell.com

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Sounds like the rear lighting for the screen is faulty. Replace the screen.

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My dell inspirion 6000 laptop screen goes black but sometimes I can see the windows screen but it's very dark. When I attach it to a desktop monitor it works fine but the laptop is still dark. Sometime the...


The back light is the whole of the screen, the screen is illuminated by a CCFL lamp (fluro tube) on the bottom of the screen. A inverter supplies high voltage to this CCFL lamp.
If your laptop appears to boot up and the hard disk LED flashes, then the problem is probably a back light fault. This can be a faulty inverter or a faulty CCFL lamp. Please click on this link and follow my instructions to identify the fault and possible fix :-
http://www.fixya.com/support/r3598095-faulty_laptop_lcd_screen

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1 Answer

My brightness control does not work just turned on and can not hardly see anything it is up and running what now


Have you tested it with an external monitor?

I would say you either have a damaged inverter board or screen baclight lamp. Usually the inverter board fails in one of the following ways:

1. When you turn on the laptop, the screen lights up for a short period of time and then goes dark. You still can see an image but it is very dark, almost invisible and definitely not usable. When you restart the laptop, the screen lights up and then goes dark again. The laptop works fine with an external monitor.
2. Your laptop turns on but the screen remains dark all the time. You still can see a very dim image outline. The laptop works fine with an external monitor.
3. The laptop screen works fine for hours or even days, but sometimes it goes very dark as it mentioned above. When you restart the laptop, the screen works fine again.

Inverter failure symptoms are very similar to backlight lamp failure symptoms and in most cases you cannot tell which one is causing the problem until you replace either the inverter board or the backlight lamp. From my personal experience, inverter boards fail more often than backlight lamps. If you have to guess, replace the inverter first.

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The backlight has went out on your screen. I had this happen on an old laptop I was messing with. Check the link below for some tips.

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Laptop screens often have several bulbs incorporated in the screen. Most oftern, the screen itself must be replaced. You can go on the samsung website and look up specifications on your laptop model. Some sites also have the option of chatting with a tech support person. If so, they could give you answers about the LCD screen on your laptop and if you can replace parts of the laptop screen or if the entire screen needs replacing. Is your laptop have any warranty coverage?

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The Back-light on your LCD screen is bad, your crystals aren't illuminating, so it is dark.... very dark.

You need a new LCD screen.

Sorry.

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It sounds like a LCD backlight problem. Bring it to an authorized repair shop.

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