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Monitor backlight problem (Dell S2409W)

Hi
My Dell S2409W monitor seems to have a problem with its backlight. On booting it shows the windows boot screen for about 5 or 6 seconds then goes off. It then comes back on at the welcome screen but again only for about 5 or 6 seconds before going off again. Again it comes back on to show the desktop for another 5 or 6 seconds before going off for good. If at this point I just switch off the monitor and back on it displays the desktop again but again only for 5 or 6 seconds. It will repeat this indefinitely. It seems to be a power/hibernation problem. The monitor is new but not covered by warranty. Is the backlight a single entity? Can it be adjusted or failing this can I run a seperate power feed to it?. Theres no chance of adjusting it on the menu as there is'nt time.

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Pa_ma_fi, Have you figured out how to do the flashlight test on you monitor when it's lcd panel turns black or blank n black. No, CCFL back-lit lcd monitors require lots of things to be working all together at once to light up the CCFL tubes. The new style curlie-Q screw-in, energy efficient CFL light bulbs are of the same similar technology and use an "electronic-ballast" circuit to "light-up" the lamp! You will need to check to see if pc is working perfectly with old monitor that you know is good. You should do some free reading here at fixya in my and other fixya ccfl back-lit lcd technicians profiles. ou will also need to visit YOUTUBE for "LCD monitor disassembly" and "LCD monitor repair" videos. May need printed circuit board "switch-mode-power-supply/ ccfl inverter supply " to be repaired If pc software/firmware has been determined not to be causing this on/off/on/off symptom.
12fixlouie

Posted on Apr 30, 2010

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