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I've bought a Macbook Air mid 2013 trough a secondhand website. After test it all I told the man that I'm interested. So I payed.

Once at home, I realize the keyboard backlight doesn't work. I've reseted PRAM and SMC. It's not working.

I've opened the computer to see if could be something wrong just like a wire disconnected but nothing seemed not right.

The computer is no longer covered by Apple guarantee and I wouldn't like to pay for the repair.

Is there any other option to get my computer fixed or something else I could do to make the backlight work?

I have run AHT (Apple Hardware Test) and it tells me there's an issue with my battery, that needs maintenance. The battery only has 160 cycles and it last 8-9 hours from 100% to 0%, so I don't understand.

I run the next command: 

ls /System/Library/Extensions | grep AppleBacklight

and this is the output: 

AppleBacklight.kext
AppleBacklightExpert.kext

When I got home I restored everything from my Time Machine backup, so I don't know if that's the cause.

One more thing: when the macbook is shut down and I press the power button, the boot screen is usually gray color with the Apple logo. In this computer the screen is black with the Apple logo.

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  • Will the following command output anything? If yes, please edit question to include the output. ls /System/Library/Extensions | grep AppleBacklight
    – John K
    Jan 2, 2016 at 13:49
  • yes it outputs. I edit.
    – Aitor Sola
    Jan 2, 2016 at 13:51
  • These are the Backlight Drivers. They're there I see. So now I suppose you can ls /System/Library/Extensions/AppleBacklight.kext/ and see if the kext contains something
    – John K
    Jan 2, 2016 at 13:59
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    The kext contains a Content folder, inside that Content folder there's: Info.plist, MacOS, _CodeSignature and version.plist.
    – Aitor Sola
    Jan 2, 2016 at 14:03
  • 1
    I'm chatting with an Apple expert.
    – Aitor Sola
    Jan 2, 2016 at 14:18

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