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2.3GHz, 2.6GHz, or 2.7GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.7GHz) with 6MB shared L3 cache.

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Still Horizontal Lines across the screen

I have these lines across the screen. It doesn't flicker and they can be seen more easily on solid colors. Any chance of bad connection or is my lcd really broken?

Since the lines are steady, I don't think it's the gpu fault...

Thanks in advance!

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Answered! View the answer I have this problem too

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Hi Diego,

I have this exact issue. Just out of interest, is the display on your Macbook Pro made by Samsung (like mine) or LG?

Have you fixed the issue yet? I tried to go to the genius bar but they said it would cost more than £500!




How can you tell who makes the display?


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Hook it up to an external monitor to help diagnose the issue. Let us know your results.

If this shows up on the external monitor, take it into Apple or an ASP and request the video test for this issue to get Apple to give you a logic board fix for free:

MacBook Pro Repair Extension Program for Video Issues

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You'll need an iFixit precision screwdriver kit. Remove the bottom cover using the pentalobe P2 bit, then remove ribbon cables until you have unimpeded access to the logic board. You may need to remove the proprietary display connector, then reseat it. Reassemble the computer.

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This may also be a GPU problem. Try downloading the latest drivers from Intel's website.


Thanks for the reply. I've already tried to disassemble the Macbook and disconnecting / reconnecting the lcd cable from / to the logic board. And about the driver, it runs OSX, so you don't actually install Intel drivers, since they are kernel extensions. There is no way to "update drivers" by yourself, they are updated within the system updates.


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Diego Odorizzi will be eternally grateful.
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