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Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

iMac Screen Turning Blue periodically


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billwill

 
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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.

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chscag

 
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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.
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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.
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billwill

 
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That was it ! Thanks very much !

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