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Lifeisabeach

 
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Member Since: Sep 30, 2007
Location: Wilmington, NC
Posts: 6,993
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Mac Specs: iMac i3 (mid-2010) + OS 10.9; TV 3; iPhone 5S; iPad 4

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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.

A couple things to try up front are to reset the PRAM and SMC. You should also run the Apple Hardware Test.

Steps to rule out a software problem would be to create a new user and work from that user account to see if it persists. If it does, try manually downloading and reinstalling the most recent Update Combo for the version of OS X you are running (you failed to mention any system details). If it's a weird hardware driver bug, then that may clear it up. Barring that, you may have to reinstall OS X from scratch (or install it to an external or USB thumb drive and boot from that as a test). If the problems persist despite these steps, then you are looking at a repair.

In any event, make a complete backup before doing anything else.


Please verify and include the exact model/year of your Mac and OS X version number (available from "About This Mac", then "More Info" on the Apple menu).
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Links: Onyx | EasyFind | Apple Hardware Test | How to test your hard drive | The Safe Mac Adware Removal Guide | Uninstall MacKeeper
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Lifeisabeach - Mac-Forums Member of the Month June 2009, Feb 2012, and March 2013.
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