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The left-most 2cm of my display becomes black, and it has some vertical purple, yellow, blue etc. vertical lines within the black region, and affected area changes appearence when I open and close the lid. Many people say that this has something to do with the cable. If the cable is broken, then I plan to get a replacement cable such as: http://www.aliexpress.com/item/Brand-NEW… However, how can I replace the cable? I’ve heard that the lid assembly is sealed, so how can I disconnect the old cable from the lid, and connect the new cable to the lid?

LVDS is a protocol that works based on the difference between lines. If the cable is messed up, the screen can become distorted. Old Macbooks use LVDS. Retinas & Airs use displayport. DP is a protocol that either works or it doesn’t. If the signal is not there, you see no image. Even with LVDS it is almost never the cable, but with DP, if you see the image at ALL - IT AINT THE CABLE!!!! This entire crap that it is the cable is an internet fairytale, based on wishful thinking that the problem is a $5 one and not a $100 one, and spreads like wildfire. You will be disappointed when you waste time and money replacing a cable that is not at fault. Please read and learn; it will become evident why you cannot have a distorted image from a malfunctioning displayport cable. http://en.wikipedia.org/wiki/Low-voltagehttp://en.wikipedia.org/wiki/DisplayPort