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The screen stays on for only 2 seconds and then goes black. I push the button on and it will come on again for 2 seconds for several tries. Pretty soon it won't come on at all but you can see the button turn on and off on its own with a faint flash on the screen. After awhile "Dell" appears briefly on the screen and it stops flashing on its own. I can then turn the screen on and off again for awhile with the button and then the process starts all over.

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Most likely the back light is problem.
If you see the whole screen initially, the CCFLs are ok.
Solution 1. Replace the power board, if you can get a cheap one.

Solution 2. ** Warning ** This method defeats the protection circuitry, not safe. watch closely (not only on the screen) while the monitor is plugged to the power.

On the back (solder side) of the power board , there is a 16 pin IC, OZ9938. Solder a 50K ohm resistor between pin 16 and pin 3.
You may see the screen, but not be able to adjust the brightness, which has been broken at the first place, causing the whole episode.

Good luck!

Posted on Nov 20, 2009

  • Edward Collins
    Edward Collins Feb 23, 2016

    I got a dell monitor s2009wb had this problem, I installed the 50 ohm resistor, On pins 3 and 16 on the 16 pin chip, It works great, Thanks a bunch, Ed

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You may have a defective CCFL backlight, it may have the following symptom: Screen flashes on and off or displays reddish pink hue. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickers 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 replace the CCFL lamp.
To determine if the video card or the LCD is faulty, 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. It could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out, this is the most likely case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out LCD Parts for service, parts, and DIY info Use this link to their WEB site :-
www.lcdparts.net

Posted on Sep 27, 2009

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