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Where Dell Flat screen 15" monitor has not been used for a period of time or on boot up the screen displays for a seond then goes black (although in a certain light you can see the icons and programs in use). If you switch the monitor off and back on again the display appears for a second and goes black again. If you complete this around 30 to 40 times then the display appears fully lit up. Throughout this time, where the monitor is switched on, the power button appears green

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You most likely have a bad connection inside the unit. Specifically, there are a couple of "backlights" that provide the light that will pass thru the LCD panel. If you can open up the unit, with the screen facing up, there should be a small PC board on the right. Check the connections on that board. Be careful as there is high voltage there.
Keep us posted.
Dan

Posted on Apr 08, 2008

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I have the same problem as this one does. my monitor goes black when windows boots. I can see the computer load at fist, then when the window icon shows. the screen goes black. WHY ?? im thinking there is...


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1 Answer

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Sounds asif the Xenon tubes that backlight the LCD are losing power. Probable cause, a power invertor or PSU fault.
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It sounds as if you have a resolution set that the display does not support. Restart your machine in safe/VGA mode by holding down F8 while the machine boots. Once in safe mode, set the resolution (Right click--> properties--> Settings--> Screen Resolution) to one that your display supports.

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Just to check - when the screen is black- can you see any image- in its un-illuminated state. To do this look sideways along the screen not straight at it. I suspect this is an inverter problem. Whether or not this is repairable I know not- depending on your local repair facilities Perhaps DELL can suggest a local agent.

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