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  1. #1

    Member Since
    Jan 15, 2008
    Weird Blue Lines on iMac
    I woke my computer today to find these weird lines on my screen. The computer works fine beside the lines. It seems like only some colours are affected because some parts of my screen are fine but others have the lines. Also when I'm on a page and i scroll down, it turns all blue instead of lines. Here are some screenshots of what they look like. Any ideas of what could be causing it?

  2. #2

    Soulwar's Avatar
    Member Since
    Jan 27, 2008
    Estero, FL
    iMac 17" 1Ghz G4  iPhone 3G  10.5.5
    When all else fails, try everything!
    The Rep System and you.
    Life's a joke...If you're not laughing, then you didn't get it.

    June 2008

  3. #3

    Member Since
    Jan 15, 2008
    Thanks for the suggestions, unfortunately I'm still having the same problem. I guess I'm going to have to take it in and prepare to spend some money.

  4. #4

    Member Since
    Jan 27, 2007
    17 inch 2 GHz C2D imac (5,1) with 3GB DDR2 RAM, X1600 (128MB memory) GPU - OSX 10.6.3
    Go into your system preferences and click on the Displays button then the colour tab at the top. And make sure the colour profile selected there is the right one for your mac. And if it still looks strange then you can always click the calibrate button and use the assistant to fix it up.

    Why I'm saying this cause I've seen people with similar symptoms to you and their colour calibration of their screens were out. I dunno how they became wrong but it was an easy fix following the above and a little playing around with the settings.

    This might not help you at all but it's worth looking into.

    Also there should be in the utility folder something called the ColorSync Utility. Run it, and in the first aid section there too a verify and a repair if needed to to fin up some of your profiles.

  5. #5

    Member Since
    May 29, 2009
    blue lines.
    the exact same thing has happened to my imac and it has been like that for about 6 months now!

  6. #6

    Member Since
    Jun 09, 2009

    My iMac G5 suddenly started displaying the same blue lines as depicted in the screenshots at the start of this post - although not as bad. They're only really visible in light areas of the screen - not on the dark desktop pic, for example.

    Have tried resetting the PRAM etc but it wouldn't work - I think due to me locking the firmware when I reinstalled the system a while ago? Tried to reset the SMU but didn't seem to help.

    Anyone figure out what the cause of this is? Am wondering if it's hardware related....

  7. #7

    Member Since
    Apr 26, 2009
    Power Mac G5, August 2004, Apple 20" Cinema Display
    Vertical columns of white pixels
    Are you referring to the vertical columns of white pixels on the screen shot , second one down.

    I have a Power Mac query but the problem with mine is a lot worse

  8. #8

    Kevriano's Avatar
    Member Since
    Jul 02, 2006
    Crawley, England
    20" Intel iMac 2.4 Ghz/3G Ram/320HD, Snow Leopard. PBook G4, 1.5Ghz/1.5 Ram/250 HD, Leopard 10.5.6.
    Video cards by the sound and look of it. Run a hardware test.
    Try my custom Mac Forums Search Engine: Mac Forums Google Search

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