Graphics card doesn't post any graphics to my monitor, computer boots up fine

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Thread Starter
Jul 15, 2009
Hey everyone, I'm in dire need of some help with my PC. The computer turns on fine, and boots up (can hear the windows start up tune) but I can't see anything on the monitor. Here's the details:

I was playing a computer game on friday, and during that it crashed. I have no idea if this is when things started or not, but I restarted and it was fine.

On sunday I had another crash, only the screen flickered once or twice and there were green pixel lines going from top to bottom of the monitor , about 2 inches apart in a perfect pattern. When I restarted, there were no graphics on the monitor. The light was flashing indicating it was on power saving mode.

I took the computer apart, unplugged everything, and put it all back together, and for whatever reason it worked fine for about 6 hours.

The next day I turned the computer on, and it loaded fine, but shortly after there was the return of the green pixel lines, with the added addition of the top left corner of the screen being filled with green pixelated triangles in a perfect pattern. These were flickering furiosly.

I tried restarting my computer, and again I got no graphics posted to the monitor. However the computer booted up fine, and I heard the start up tune, and 5 minutes later I shut it down by pressing the "Power Off" button on my keyboard.

I tried another monitor and again, got nothing. I then tried taking the computer apart and putting it back together again, only this time it didn't help.

I've taken my graphics card out, put it back in, used both the monitor cable ports, left the computer off all night without the power cable in, and I can't get anywhere.

I've taken my old card (GeForce 8800GTX) out, and borrowed my landlords 7800GTX, which is working fine at the moment. I would go and buy a new card, but I don't want to risk this happening again if I don't know why it's happening. (Fingers crossed I don't break my landlords graphics card by putting it in my pc)

I would like to know what's causing this, if it is my graphics card, or whether my motherboard will just start eating future graphics cards. A friend of mine had a scenario not long ago where his motherboard kept breaking his graphics cards some how. How would I know it would be safe to splash out on a new card?

My computer worked fine for 2+ years until now.

I'd also like to point out that the fans didn't go into faster mode at any point, they all remained pretty calm, so I don't think it was overheating.

My computer's spec is:
OS: Windows XP
GPU: GeForce 8800gtx
DVD: Sony DVD-RW Q170A
Networking: Nvidia nForce Networking Controller
Processor: Intel(r) Core(tm)2 Quad CPU @2.66GHz
Motherboard: nForce 680i SLI
PSU: Enermax Galaxy 1000 watt

Thank you everyone =)


Dec 26, 2002
First Name
Its usually just the graphics cards, they do fail especially if they overheat - then video card fan not speeding up might have been the problem - most are dynamic and should actually speed up under load. Depending on the manufacturer of your 8800GTX you might be able to get it replaced under warranty if they have a 3 year or greater warranty.
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