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Macbook Air keyboard and trackpad stopped working.

xAcid9

Hey guise, i have this early 2014 MBA which the keyboard and trackpad just suddenly stopped working after logon. Both didn't work in recovery too.

Weirdly the keyboard and trackpad work completely fine when i boot into windows/linux or after "POST".

 

Things i've tried:

1. Resetting the PRAM/NVRAM and SMC.

2. Complete wipe and restore to original OSX Maverick.

3. Upgrade to latest High Sierra.

 

Any idea how to fix this?

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The problems involving keyboard or trackpad fail I've seen were related to battery inflation, but as yours work on linux or windows that might not be the case. 

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I think Louis Rossmann ran into a similar issue some time ago. There is a way that a certain run of MacBook has its keyboard and trackpad communicate with the rest of the system that can break inside macOS. 

 

Most likely cause would be some sort of liquid damage. Open it and look inside for any obvious signs of damage. If there isn't any it to a local repair shop and have them give you an estimate or ship it to Louis Rossmann so he can make a YouTube Stream out of it. 

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