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Major problem with the 15” flat panel display on my Dell 3000 desktop

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I get NOTHING on my display; it is completely black. Furthermore, none of the usual images appears when I press any of the three buttons to the left of the power indicator. The power indicator button is currently amber. Pressing it once turns the light off. Pressing it again turns the indicator green for 1 second after which it returns to amber.

When I turn the pc off (by hitting the power button on the System Unit) and then ON, the system <sounds>as if it is booting properly (the numlock light comes on and off; the display power light is green; I hear the familiar Windows chimes.) But I get nothing on my screen! After many minutes (like 40) the green light on the display turns to amber.

Whatever could have gone wrong? One minute everything was working, 30 minutes later (without anyone touching the system) my screen was dark. It is as if the CRT gun in a CRT burned out … but of course this is not a CRT. ?????

a. Is it possible/likely that the electronics inside the display has conked out?
b. Is there some combination of keys that I accidentally hit that makes a screen go dark?
c. Any suggestions on what to try?

Desperately seeking guidance.
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    motto - Just get-er-done

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The first thing to try is to unconnect the monitor then reconnect all cables. Next is to try another monitor. Borrow one and see if it shows video. Step 3 is to try a video card, first with your monitor then with another good monitor. You may have to disable the onboard video in the bios before connecting a video card. It would help to read the PDF manual you can get at the dell website to find out if you need to disable the onboard video( many do this automatically).

This is a pretty old computer now. I would not spend very much money trying to fix it. It might be time to think about buying a new one. I haven't bought DDR3200 in a couple of years now. About the only thing i have left from old computer trade-ins is a 3.0 gig processor and a bunch of memory sticks( 256 and 512's). I don't even have any running single core computers anymore.

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