Released June 2012 / Core i7 processor with Turbo Boost / Up to 1 GB DDR5 Video RAM

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UIOJKLM keys are not working on my MB Pro 2012 15.4" Unibody

I added a 2nd SSD in optical drive bay (Data Doubler) in my MB Pro 2012 15.4" Unibody. I've done this on a few MB Pros and iMacs and never had any issues. Now UIOJKLM and > keys aren't working. But before that, WiFi was acting up. I couldn't turn WiFi on in ntwk pref, but now it's fine. Just kybd issue.

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I have the same problem and it just started today (19 Feb 2017), midway through typing something. 7 u i o j k l m . keys won't type. The rest seem fine.

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Any solution to this problem.I am also going through the same problem

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Go to step #17 of this guide: MacBook Pro 15" Unibody Mid 2012 Upper Case Replacement

Put a piece of tape on the cable, flip up the lock, and pull the cable deeper into the socket, then lock it in place.

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