Graphics issue w/ 24" iMac (NOT the screen problem)

Discussion in 'iMac' started by Magritte, Jul 17, 2008.

  1. Magritte macrumors member

    Joined:
    Jul 14, 2007
    Location:
    Los Angeles, CA
    #1
    I do have a 24" iMac, bought in January 2007. But I have never had any problems (yellowing, color gradient, etc.) with the screen and I believe this is a graphics issue.

    I play WoW Mac-side and CoH Boot Camp-side. (My system software is still 10.4.11.) A few months ago I started to get weird artifacts in both games. I have made sure all drivers were updated and so forth. These artifacts include flickering, flashing of blank terrain, lines across the screen that look like the light graphics in CoH rave missions (if that makes any sense). This used to crash CoH pretty frequently until I uninstalled SP3 from Windows XP and now I just get the occasional graphics problem I described. They range from mild to forcing me to quit.

    When Windows used to crash after CoH, if I rebooted into Mac, I would have a strange, light square of color, sort of like a burn-in. If I used the mouse to select the area, it went back to normal as though erased. Recently I was playing in Firefox and one of those strange squares appeared at the top of the screen.

    Up till now I have had absolutely no graphical issues playing either game. Since the problems both started around the same time my best guess is a graphics card issue. In my iMac it is a 7600 GT. I don't know if it could be a heat issue as the fans never went on.

    I wager my first step is to open up the back and give it a compressed-air cleaning. If that doesn't solve it...is my video card hosed? I've also encountered slowing in Sims 2 where I didn't have it before. When not using graphics-intensive applications I normally have no problems, except for that color square in Firefox.

    Thanks for any help you can provide.
     
  2. gehrbox macrumors 65816

    gehrbox

    Joined:
    Jul 5, 2007
    Location:
    Charleston,SC
    #2
    Sure sounds a lot like the problems others have posted when their video card was failing.

    If you could post a picture others that have seen it would be able to confirm it.
     
  3. Magritte thread starter macrumors member

    Joined:
    Jul 14, 2007
    Location:
    Los Angeles, CA
    #3
    Crud. Yeah, I forgot I had no screenshots when I wrote that post.

    99% sure I got the extended warranty; will Apple fix it for free? Or am I going to be out some bucks?
     
  4. Magritte thread starter macrumors member

    Joined:
    Jul 14, 2007
    Location:
    Los Angeles, CA
    #4
    Well, I ran both Disk Repair and the Hardware Test and both came back clean as a whistle. Hopefully this means my video card isn't fried yet? I'm going to try to use smcFanControl and see if that helps but unfortunately there doesn't seem to be a way to do that in Windows. SmartFan (I think it's called) doesn't recognize the fans so all you can do is check the temp.
     
  5. gehrbox macrumors 65816

    gehrbox

    Joined:
    Jul 5, 2007
    Location:
    Charleston,SC
    #5
    If they can duplicate the problem and it is under warranty they will fix it free. The problem is if they can't make it fault.
     

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