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Thread: What would cause this? Video card or Monitor

  1. #1
    Maximum Bitrate DiNASTY's Avatar
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    What would cause this? Video card or Monitor

    Hi,

    I've been having some video problems lately and I thought this might be a good place to ask first. I have a Dell 30in monitor and a GeForce 7900 GT KO video card. The Dell is a fairly new model and the 7900 series video cards are known to have issues. However after researching, I can't seem to pinpoint which is causing the problem.

    This first issue looks like the picture below (I had to recreate it in photoshop because the problem did not show up in a print-screen). It occurs randomly and the only way to fix it is to turn off and on the computer until it goes away. I initially suspected some interference caused by nearby power-lines or perhaps a dirty power signal from the wall socket. So... I went out and purchased a hefty power conditioner and tried spacing out the DVI cable from the power cable (neither seemed to work).

    The second issue is harder to describe so I made a flash movie to recreate it. I can only describe it as flashing pixels that sort of sparkle down the left side of the screen. This happens spontaneously as well...

    The third issue I'm experiencing is shuttering during video playback (especially HD movie trailers from apple.com). I tried adjusting vertical sync as suggested by someone on the nvidia forums, however that was no go as well

    Any ideas?
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  2. #2
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    This kind of fault typical happens on like laptops screens or LCD monitor.

    But from what I understand you are using a CRT monitor?

  3. #3
    Maximum Bitrate DiNASTY's Avatar
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    nah, 30in Dell LCD (3007wfp)

    so your saying it is a common issue with LCD's then?
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  4. #4
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    Quote Originally Posted by DiNASTY
    nah, 30in Dell LCD (3007wfp)

    so your saying it is a common issue with LCD's then?
    Yes its common on LCD screens. What normally goes on them is the connector/cables that connects from the controller to the LCD display. If one connection is bad then the alternate vertical line wont work.

    I had a few screen that did this, reseating the cables normally fix it. Sometimes its the actual matrix connection on the LCD itself. Gently squeezing the top of the LCD may fix it temporarily. If you see a slight change in display while doing so then you know its a loose connection on the screen.

    Worth a try.

  5. #5
    Maximum Bitrate yrean's Avatar
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    ive seen this on a crt also.. but only after the monitor was dropped. if you try a diff vid card and the same thing, id have to say its time for a new monitor.
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  6. #6
    Maximum Bitrate DiNASTY's Avatar
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    Thanks for the info guys... I'm still under warranty from Dell so hopefully they will honor it if I can prove that it's the monitor and not my video card.
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  7. #7
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    Im sure you have already tried the obvious like the refresh rates, resolution, different VGA card and all.

    You may not notice this fault while on BIOS setup or DOS. Its mostly noticebale when windows boots up and the screen is run at its maximum native resolution.

    If its still under warranty then go for it.

  8. #8
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    I had this happen on a CRT, but it only affected certain windows. If I let it go long enough, all windows were affected... Turned out to be an overheating vid card. (Desktop)
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  9. #9
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    looks like faulty drivers to me. i'd uninstall/reinstall them. just a guess tho. had something like that happen on a win98 machine of mine :P

    edit:

    if the problem doesnt show on a printscreen, it's definitely the monitor. sorry i didnt read the whole post.

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