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It happened few hours ago - I tried to switch the MacBook Pro mid 2012 on from sleep. It doesnt switch on for some reason. I then shut the lid and suddenly the apple icon behind the screen lights up and I open the lid. But what I see is a screen of vertical stripes only in various colors, mainly different shades of gray. How do I fix this and why did this happen?

  • Have you tried turning it off (by holding the power button) and turning it back on again? – herculeesjr Nov 7 '15 at 14:36
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This is a common problem with 2012-2013 Macbook pro's, and is caused by the connection to the GPU card cracking. Apple is offering a repair program where they will fix this for free. If you have an Apple Store near you, I would suggest taking it in and having them fix it.

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