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Mid 2012 model, A1278 / 2.5 GHz i5 or 2.9 GHz i7 processor.

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Screen gets horizontal lines on it whenever I change the angle?

Hi everyone!

I have a 3yo Macbook Pro, and a few days ago it has started getting horizontal lines on it whenever I change the screen angle. If I don't keep it just so, the lines take up the whole screen and keep moving steadily downward. When this first started happening, the lines would just appear when I moved the screen, but now they occur if I am not holding the screen slightly towards the keyboard. I think it is some kind of loose display cable, but I read that Apple can't just fix the cable and would have me replace my whole screen to fix this. My AppleCare of course ran out in October so it would cost way too much for me to replace the whole display. I was wondering if somebody could confirm this is the problem and has any advice on how to fix it myself?

Thank you!

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There was a hardware fault with 2011-2013 15 and 17" MBP that caused similar flickering and that's covered under warranty (caused by interference from the wifi - turning wifi off or disconnecting an antenna would fix it) but I don't think that's the problem here. It sounds like your display data cable is damaged where it routes through the hinge and it's causing this problem. See this LCD replacement guide step 14 to see the cable. Removing the LCD and inspecting the cable might reveal damage and may allow you to repair and re-route it so as to fix the problem.

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Thank you! I also don't think it's the wifi - that doesn't really seem to make a difference. I will check it out.

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