Why do I have white horizontal lines on my Macbook Pro Retina?

When I am using my 15" Macbook Pro, there are often white horizontal lines that run across the screen. It usually happens when I am watching a video, typing, scrolling or just sitting on the desktop. There are days where the screen is perfect and there are no problems; there are also days where it happens so frequently that some videos becomes unwatchable due to the distracting lines flickering and flashing on the screen. They don't stay all the time but I'd love to know what the problem actually is. Thank you for reading, and please help me out.

Hi there JohnRendleman,
I would recommend taking a look at the troubleshooting steps found in the article below.
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/HT1573
-Griff W.

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Why do I have white horizontal lines on my Macbook Pro Retina?

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