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PC monitor not lighting up for around 10 mins

Where Dell Flat screen 15inch 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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Check the capacitors on the power supply board inside the monitor. They malfunction, heat up, leak or pop and stop doing what they are designed to do, smooth out the power supply to the inverter and display board. You can replace these simply by buying the correct farrad, voltage and temperature rated replacements online for about .30 a piece or go to radio shack and spend 1.50 a piece. You can use a higher voltage like 35V instead of 25V but try and get the 105c rated ones to last longer in the hot P/S environment. My bad ones were 470 micro farrad, 25V and 105c rated and I had 4 out of 8 pop or bulge.

Posted on Apr 08, 2008

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The power supply board is on the verge of failing, the cause is often a bad capacitor that opens, in some cases there may be more than one involved, leaving a bulge at the top leaking it's contents making it easier to nail down.

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It turns off after 10 minutes working


When you say it turns off, is the power light going out too?

If the power light is still lit when the screen blanks, it may be a faulty backlight inverter.

After 10 minutes elapse and the screen goes out, if you power it back on, do you get another 10 min, or does it last a much shorter time period, or not at all?

Your best bet is probably simply to buy a new monitor, and sell yours as "broken" on eBay, I'm sure someone out there capable of fixing it would be willing to pay pennies on the dollar to subsidize your replacement screen.

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Inside there is a IC chip on the power pack that goes bad, replacement is called for also look for bad capacitors when you are inside looking around, those need to be replaced as well
hope this clears things up. dells third party who built these units did a rotten job on this model. that chip always fails.

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This sounds like the back light is gone on the monitir... to check this look very close at the monitor whet the PC has booted, if you see a VERY dim image on screen then it suggests that the back light is gone.

Many monitors hace a 3 year warranty so I would try a warranty claim before throwing it away

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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...


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

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2 Answers

Pc screen goes black green light stays on


Well since you seem to have tried a bunch of thing why nor go a bit more and replace your video card. Below is a link to your PC:
http://support.packardbell.com/uk/item/index.php?pn=P280110001&g=1400

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