Released June 2012, Model A1278. Intel processor with Turbo Boost, Up to 512 MB DDR5 Video RAM

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Vertical Colored Lines On Startup Screen

Hey all,

When turning on the power, the macbook pro screen’s white page has many vertical colored lines and will not display anything else. Eventually the many multicolored lines fade and a much thicker conformed line in the middle of the screen develops and does not disappear. The macbook pro is will not bypass this screen.

Thank you.


Contesta esta pregunta Yo también tengo este problema

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Can you post a few images of both conditions Adding images to an existing question


Hook it up to an external monitor to help isolate the GPU issue.


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have you tried reconnecting the cable

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Ed Murray estará eternamente agradecido.
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