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Yellow Diagonal Cubes on Screen

1097 Views 8 Replies Latest reply: Oct 30, 2007 7:10 PM by RJSky RSS
pytey Calculating status...
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Mar 22, 2007 5:58 AM
Hello,

I'm seeing yellow and blue flashing cubes across the screen when I plug in my 23" Apple Cinema HD Display into my MBP.

I've also seen this on the MBP occasionally, but at the moment the MBP display is fine.

If I move stuff around on the desktop I see pixelation and the odd colors get worse.

I've put a video up here

Anyone know anything about this?





MBP 15" CD2 2.33GHz Mac OS X (10.4.9)
Powerbook 15", Mac OS X (10.4.4)
  • infinite vortex Level 7 Level 7 (21,400 points)
    Currently Being Moderated
    Mar 22, 2007 6:04 AM (in response to pytey)
    Sounds like VRAM corruption. Does the problem persist between restarts (by which I mean shutdown, wait 10 seconds or so and then boot)? Also, you might want to try removing power to your external display and the same for your MBP (both AC and remove the battery) and see if the problem persists. Also, reset PRAM…

    http://docs.info.apple.com/article.html?artnum=2238

    As a last thing I would try booting off a clean installed copy of Mac OS X, preferrably installed on an external drive.

    Otherwise, call AppleCare.
    Mac Pro 2.66GHz 5GB/4x300GB/ATi X1900 XT/AE/BT ; Dell 2405FPW, Mac OS X (10.4.9), MacBook Pro 15.4" C2D 2.16GHz 2GB/120GB/Glossy ; Mac mini CD 1.66GHz 2GB/80GB/SD
  • David Miller7 Calculating status...
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    Jun 1, 2007 9:30 AM (in response to pytey)
    Exactly the same problem has developed recently on my Macbook Pro. The computer has to be pretty hot before it starts, so I only see it after some heavy usage. Interestingly, my yellow cubes appear to be angled in a mirror image of yours. I can take screen shots of the effect and send them to anyone at Apple who cares to take a look. The effect disappears temporarily if I switch screen resolutions; but it returns pretty quickly. Did you manage to resolve the issue and if so, what did you do? My MBP's under warranty so I may send it back for repair as it looks to me like a typical VRAM problem.

    MBP Mac OS X (10.4.9)

    Forgot to mention that I ran the hardware test and it reported back that all is well.

    Also, if you get the same problem after booting off another hard drive, it has to be a hardware fault!
  • David Miller7 Level 1 Level 1 (55 points)
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    Aug 11, 2007 1:19 PM (in response to David Miller7)
    Logic board replacement was required and fixed this problem; BUT since that replacement, I've been unable to mount any Windows installation discs properly. Means I can't install any applications on my Parallels drive (including installing Windows on a Boot Camp partition). Over to another forum!
    2.2Ghz MacBook pro, Mac OS X (10.4.10)
  • David Miller7 Level 1 Level 1 (55 points)
    Currently Being Moderated
    Aug 17, 2007 6:08 AM (in response to David Miller7)
    Fixed after I zapped the PRAM!
    2.1 Ghz MacBook Pro, Mac OS X (10.4.10)
  • dankron Calculating status...
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    Oct 29, 2007 7:13 PM (in response to pytey)
    hi,

    i've been having this problem for a wile on my mac, but wasn't too often so i never worried too much about it but ever since i've upgraded to the new Leopard this problem got even worst, now happens all the time, i don't even have to do much to trigger.

    have a look at the screenshots:

    http://www.coastalwatch.com/images/picture1.png
    http://www.coastalwatch.com/images/picture2.png
    http://www.coastalwatch.com/images/picture3.png

    can someone help me?

    cheers,
    dan
    mac book pro 17", Mac OS X (10.4.10)
  • RJSky Level 1 Level 1 (20 points)
    Currently Being Moderated
    Oct 30, 2007 7:10 PM (in response to pytey)
    I have no idea how this affects computers, but this looks to me like your typical digital signal interference.
    15" MacBook Pro, Mac OS X (10.4.10), 2.4GHz Intel Core2 Duo | iPod Nano 4GB (3rd Gen) | iPod Mini 4GB (2nd Gen)

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