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

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Letter "L" doesn't work

Hello everyone,

I have a problem with letter “L”. It once works, once not. It is very random. What I had done was cleaning all the mess around EACH cap, because there was written somehwere on FixIt this may be a problem. I though that I had fixed the problem because key started to work properly, but unfortunately not. Right now I’m typing “L” using keyboard emulation. What I know… (oh right now “L” started to work properly!). I have no idea what is going on… Noone was spilled on it and battery has about 600 cycles.

I’m awaiting for your advice !

Ответ на этот вопрос У меня та же проблема

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Are you a heavy L key user? If you are then you may only need to replace the given keys parts Key caps & scissor parts

If you had a spill or you are a heavy cleaner with spray or wet wipes the keyboard could be damaged at which point you’ll need a new one https://www.ifixit.com/Store/Mac/MacBook... ITs a bit of work! You’ll need to follow post of this guide MacBook Pro 13" Unibody Mid 2012 Upper Case Replacement to get to the inside area to remove the keyboard. Its under the black sheet and the keyboard backlight. Its held down with screws and rivets.

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As I wrote, nothing was spilled... And this is sometimes working, then suddenly do not (like now). I need to check battery

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The spillage doesn't need to be what happened this week it could have been weeks ago!

The battery problem won't effect a single key.

While your system is old and the battery may need replacing that doesn't explain things

To check the battery install this gem of an app CoconutBattery post a snapshot of the apps main window for us to see Adding images to an existing question

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@danj It has never ever happened. I don't drink, neither eat beside computer. CococnutBattery showed it is okey

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Then you should be able just replace the key parts to get your system working!

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@danj But you see... Even when I lift up key (the button) and there's only a cap i can click it at once it will work, once not. Very weird. I was wondering whether some software is interacting with it but not.

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Maciej будет вечно благодарен.
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