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Screen randomly flickers black

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For a few weeks now, randomly, during pretty much any activity, but seemingly most while playing games my screen will flicker black. Sometimes a fraction of a second, sometimes 2 - 3 seconds. I'm trying to establish what could be causing it. There is also a significant increase in the sound from the computer hardware when I play games. I tried cleaning out all the dust from the fans etc. but no improvement. Apart from the flickering I haven't really noticed any significant issues with speed or lockups. Asking around and google have lead me to believe it's either the motherboard, graphics card or power supply. Is there any way I can find out which is the actual problem?

The computer is two years old.
Intel Core 2 Quad CPU Q6600 @ 2.40 GHz 2.39 GHz
4.00 GB RAM
NVIDIA GeForce 8800GT
Windows Vista 64 bit SP2

Afraid I'm not all that great with computers, so I'm not sure if these specs are lacking anything. But any help would be appreciated!
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Hello vc_gizmo and welcome to GTG!

I would start with the basics first:

1. check you monitor video cable to make sure both ends are securely plugged in ( to monitor and to computer)
2. Next I would go to Nvidia's website and update your graphics card drivers
3. Try a new video cable
4. Last, if none of those worked, see if you can access another monitor and try that out.

Monitor's have bulbs in them that burn out over time. I'm wondering if yours is slowly burning out.

Edited by laynlow200, 28 July 2010 - 10:09 AM.

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