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Some Keys on the Keyboard don´t work

Hi! In the guids of the macbook retina 2012 I cannot find a guide to repair some keyboard issues. Since some days some single keys (the "m" for example) don´t react anyore. First I thought a RP-reset can help - the reset didn´t help, so it seem to be a mechanical problem and not a software issue. Maybe dust or something else.

Does anyone have some experience with that??

Thanks for your help!

Andreas

Update (11/13/2017)

Hi!

My batterie seems to be ok - what do you think?

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Update (11/13/2017)

Hi!

You never believe...! I found the problem! It´s not the batterie and not the keys are damaged. It was/is an software issue - so nothing to fix in this case.

It seems to be a high sierra problem I earned when I told my OS to ignore the built in trackpad when a mouse is connected. (I did this because of some Logitech mouse issues - suddenly no scrolling, because of safari safe mode on login sites...) This option caused in NO mouse as I was on the road...so my trackpad was ignored even if no mouse was connected...so I had to lend a mouse and switch of that option. What I didn´t recognise, that the option "enable mouse keys" was switched on - not by me, but turning my "m", "L" and some other keys into mouse keys...thats it. This option should turn the nummeric pad into mouse keys and not the m, L,... ;-) - i recognised this because the cursor was moving a very little when pressing the non working keys.

Thanks for your help!! Nothing to fix, but good to know!

Andreas

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On the most part there are two issues that cause a keyboard key/s failure a liquid spill (or food crumbs) or the battery is pressing up from below.

If you only have one key failing I would pop the keycap off and see if dusting out any crumbs or with a cotton swab (Q-Tip) just barely damp with isopropyl alcohol clean the area. Here's a vid showing how to pop them off to clean under them: How to remove and clean Macbook Pro keyboard keys.

If you spilled liquid into the keyboard over time the other keys could give out. You may need to go inside to either replace the whole uppercase (easiest but expensive!) or replace the discreet keyboard (more work but cheaper!). In either case you'll need to follow this IFIXIT guide: MacBook Pro 15" Retina Display Mid 2012 Upper Case Assembly Replacement Go on Amazon or eBay to locate a replacement keyboard. Make sure you get the screws! some forget you need them to replace the pop rivets.

If you suspect the battery is swelling then you'll need to replace it ASAP so it doesn't damage things. To see if the battery is going I would use this gem of an app: CoconutBattery post a screenshot so we can see what its telling us of the full main screen.

Here's the IFIXIT guide you'll need to follow: MacBook Pro 13" Retina Display Early 2015 Battery Replacement and here's the battery you'll need: MacBook Pro 13" Retina (Early 2015) Battery

One rub here is the battery can only be shipped by ground so depending on were you are you may need to find an alternative source for the battery or travel to somewhere where you can get it.

MacBook Pro 13" Retina (Early 2015) Battery 이미지

상품

MacBook Pro 13" Retina (Early 2015) Battery

$79.99

MacBook Pro 15" Retina Display Mid 2012 Upper Case Assembly 이미지

안내서

MacBook Pro 15" Retina Display Mid 2012 Upper Case Assembly Replacement

난이도:

어려움

—

1 - 3 hours
MacBook Pro 13" Retina Display Early 2015 배터리 이미지

안내서

MacBook Pro 13" Retina Display Early 2015 배터리 교체

난이도:

어려움

—

45 minutes - 2 hours

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Thanks Dan!! For your great explanation. I´ll go through all that points step by step... I hope I find some breadcrumps ;-)

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Thank u soooooo much, i had the same case so ur comment was really life saver , thank u

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My Mac, admittedly old from 2010, had enough keys not working that I first bought a clunky external keyboard, and then gave up on it. Today I reinstalled the OS (High Sierra) and for the first time in years all the keys work perfectly. Go figure.

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