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small thin line across screen

305 Views 3 Replies Latest reply: Dec 1, 2012 10:35 PM by BDAqua RSS
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Nov 26, 2012 4:10 AM

I turned my mac on the other day to see a thin line that runs across the screen at all times, its white when on black and black when on white. If you take a screen shot of the screen its not there.

 

Any ideas

 

Thanks

 

Mark

iMac, Mac OS X (10.7.5)

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