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chscag

 
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Member Since: Jan 23, 2008
Location: Fort Worth, Texas
Posts: 40,102
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Mac Specs: 27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, 3 iPods, OS X Mavericks

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Quote:
That almost certainly is a hardware problem, such as a loose cable or a connection that is shorting out, and only appearing intermittently due to the motion of opening/closing the lid.
I agree with member "lifeisabeach". It could very well be a loose cable connection or one that is being pinched off by opening and closing the lid. If you feel up to it, go to iFixit: The free repair manual and look at the take apart instructions for your machine. You may be able to repair it yourself.
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