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My notebook is showing a light dark sreen but its working fine the only problem i cannot see well sinse the screen is dark when i bring it close to the light i can seen but not clear.thanks

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Have you adjusted the brightness? Amend where necessary
Does it happen even on startup? Yes = Monitor Failure repair/replace. No=Graphic settings

Posted on Oct 30, 2008

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Have a cq60 compaq and i replaced the sreen because it was cracked now after doing so the sreen is still dark but if u look close enough u can see an image so after serchang i replaced the inverter and...


Could be a defective backlight lamp in the new screen. I suggest you either return the new screen & buy another one, or swap the backlight lap in the new screen with the one from the old screen (which most probably is still good).

Please refer to the following article for more details about the diagnosis & troubleshooting of this issue:
http://www.fixya.com/support/r6430776-troubleshooting_laptop_power_failures

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Compaq presario cq61 screen went dark but can still see window faintly through the dark sreen.


Look at the LCD screen very closely and check if you can see a faint image on the screen. It's possible that the LCD lid close switch stuck in the "closed" position and the back-light stays off even when you open the LCD screen or turn on the laptop. The switch turns off the back-light when you close the LCD display to save the laptop battery power.

If no luck, try to remove battery and drain the power, then replace battery and turn on.

If that didn't fix it then there are 3 things that could have gone wrong:

1. Video cable connection from inverter to LCD got loose. To check this, follow instructions from step 3 on how to open the LCD and check if cable is fitted properly.

2. The video inverter is faulty
The screen inverter failure is very similar to the back-light lamp failure. In both cases the screen gets very dark and the image on the screen becomes very faint, barely visible under a bright light. If it's still under warranty, take it for a replacement. You can replace this otherwise - you can find the inverter under the screen, follow the procedure described at point 3 to open up the screen.

3. The LCD monitor is faulty
If it works on an external monitor most likely the LCD is faulty and needs replacement. If it's still under warranty, take it for a replacement. If not, you can do it yourself, it's pretty easy. Remove the rubber covers on the side of the screen, unscrew the screws take the plastic cover off, disconnect the video inverter and put in the new LCD after you connect the video inverter to it.

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3 Answers

VERY Dim screen after a drop


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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You say you can still see the screen if you look close enough. The only thing that gives it more light is the backlight. It is either shorting itself out right after it comes on or the device that powers it (usually the inverter) is the culprit.

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This could be a backlight issue, a board issue or an inverter issue. Look at the screen closely, if there is a faint image it's either a backlight issue or inverter issue. To weed out between the two you can just order on inverter, they're 20 bucks on ebay, if that doesn't work, replace the backlight. Backlight repairs are somewhat difficult. As much as I would like to be able to tell you a quickfix that will solve backlight the problem, you'll most likely have to google for guides that show you exactly how to replace the backlight or bring it in for repairs.I work for Mac Repair NYC and i have to fix this problem a lot.

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

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First try going into the display properties, in the screen saver tab you will see a button marked power, click on this and set the screen to never. This will set the screen to stay on, however, this is most likely a problem with the screen inverter or the screen itself. Check the screen connections, they sometimes work loose. At this point all that's left is the screen and inverter.

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