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

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some keys on my MacBook Pro 2012 don't work properly!

How could I fix my macbook pro keyboard? I have problem with some keys on my keyboard that doesn't work properly,After many tries I found that some keys together click another key like:`+z+=bringing up the volume level

`+x+c=( § )

`+x+c+v=( [ )

`+x+c+v+b=( ] )

`+x+c+v+b+n=( = )

`+x+c+v+b+n+,=( ⬅ )

`+x+c+v+b+n+,+.=( ⬆ ) anybody has any idea about what the problem and how to fix it??

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To check your battery use this app: CoconutBattery. Paste a screenshot of the main window here for us to see. Here's how: Adding images to an existing question

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Your keyboard is a collection of switches in a grid pattern (X & Y). So what can happen is either pressure from a blistered battery is pushing on them or you had a liquid spill which damaged the contacts. What you are seeing is the horizontal line servicing the X, C, V, B & N letters ', . keys and two of the arrow keys is bad.

As this is also the row thats closest to the battery I'm hoping the battery is the issue. Here is the IFIXIT guide you'll need to follow: MacBook Pro 13" Unibody Mid 2012 Battery Replacement and depending where you live here is the IFIXIT battery with the needed tools and sundries: MacBook Pro 13" Unibody (Mid 2009-Mid 2012) Battery You can also get the battery alone MacBook Pro 13" Unibody (Mid 2009-Mid 2012) Battery if you already have the needed tools.

If you did spill something into the keyboard then thats were you'll need to replace the keyboard which would require you replace the uppercase assembly MacBook Pro 13" Unibody Mid 2012 Upper Case Replacement and here's the uppercase part: MacBook Pro 13" Unibody (Early 2011-Mid 2012) Upper Case

MacBook Pro 13" Unibody (Early 2011-Mid 2012) Upper Case Image

Product

MacBook Pro 13" Unibody (Early 2011-Mid 2012) Upper Case

$39.99

MacBook Pro 13" Unibody (Mid 2009-Mid 2012) Battery Image

Product

MacBook Pro 13" Unibody (Mid 2009-Mid 2012) Battery

$69.99

MacBook Pro 13" Unibody Mid 2012 Battery Image

Guide

MacBook Pro 13" Unibody Mid 2012 Battery Replacement

Difficulty:

Moderate

5 - 15 minutes

MacBook Pro 13" Unibody Mid 2012 Upper Case Image

Guide

MacBook Pro 13" Unibody Mid 2012 Upper Case Replacement

Difficulty:

Difficult

1 - 3 hours

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4 Comments:

thanks for answering,I just want to correct my self first that my laptop is

MacBook Pro 13" Unibody Mid 2012

not MacBook Pro 13" Retina (Late 2012/Early 2013)

so dose that make any difference about the problem??

and actually I don't know what happend to keyboard before as I buy it with this problem and the seller blocked me

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Yes the corrected model info does change things a bit. I've gone back and corrected my answer so now the proper guides and parts are listed.

But without knowing the batteries status I can't get you more focused here on what is needed. Did you download CoconutBattery and run it? If you ave how about posting a screenshot of the main window of the app so we can see.

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I have just added a picture of the main window of the app,what do you think about the battery,is it in good status?thanks again!

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Well, your battery looks OK from the cycle count but the temp look high running off battery. You'll need to inspect it to be sure. Pop the bottom cover and take the battery out its quite easy in this model place it on a flat surface does it rock? If it does its time for a new battery.

Otherwise you have a bad keyboard or both!

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