crwdns2890332:0MacBook unibody keyboard ribbon cable won't go incrwdne2890332:0My problem (during replacement of the keyboard) was this: I took off the coloured piece of plastic (blue or red) at the end of the ribbon cable on the replacement keyboard (DON’T DO THAT), thinking it was some protective isolation. It was far enough in the socket but just too thin to hold for the socket lock. Magically worked after putting that piece of plastic back on. Didn’t need much for at all (or the tape for that matter which I tried as well). Hope it helps anyone, leave the plastic on!