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  1. #1
    iMac Screen Turning Blue periodically
    billwill's Avatar
    Member Since
    Feb 15, 2008
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    Winston-Salem, NC
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    8 GB 13" MacBook Pro, 64GB WiFi/4G iPad, 32GB iPhone 5
    iMac Screen Turning Blue periodically
    My niece has an iMac running Leopard. She complained that sometimes the screen will turn blue and she'll have to click her mouse to remove it. I noticed when I had 2 or 3 apps open, it would turn blue and shrink all the screen so I could see them all on the Desktop. I thought it was the "Spaces" setting but when I checked, it was not checked.

    What else could there be causing this? It's driving her and her husband nuts. Thanks in advance for your help.
    "Laughter is an instant vacation"
    - Milton Berle

  2. #2
    iMac Screen Turning Blue periodically
    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
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    45,191
    Specs:
    27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, iPhone 6+, 3 iPods, Yosemite
    The next time it happens on her machine, ask her to take a screenshot of it. Let us know if the screenshot shows the same thing or not.

    Very briefly, if the screenshot shows a normal picture, it's either software or the LCD itself that may be the problem. If the screenshot shows the same thing, it may be a graphics defect.

  3. #3
    iMac Screen Turning Blue periodically
    chas_m's Avatar
    Member Since
    Jan 22, 2010
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    Victoria, BC
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    18,933
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    Mid-2012 MBP (16GB, 1TB HD), Monoprice 24-inch second monitor, iPhone 5s 32GB, iPad Air 2 64GB
    No, I think I know exactly what's going on.

    I suspect the billwill's niece has a Mighty Mouse. When you squeeze the sides, it can invoke Expose.

    You can turn this off in the Mouse preferences.

    There's a small chance that what's happening is that she's pressing the scroll button down, which acts as a "middle button." That too can invoke Expose and that too can be fixed in the mouse prefs.

  4. #4
    iMac Screen Turning Blue periodically
    billwill's Avatar
    Member Since
    Feb 15, 2008
    Location
    Winston-Salem, NC
    Posts
    403
    Specs:
    8 GB 13" MacBook Pro, 64GB WiFi/4G iPad, 32GB iPhone 5
    Thanks, chas_m !!
    That was it ! Thanks very much !
    "Laughter is an instant vacation"
    - Milton Berle

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