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Macbook pro 15" 2018. keyboard backlight not working

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    Macbook pro 15" 2018. keyboard backlight not working

    Hi. all

    I had to detach my MacBook pro 15 " 2018 (A1990) screen because it was broken.

    The keyboard backlight dies not. work anymore.

    Did I mess something up or the backlight cable is connected. to the screen?

    Thanks in advance

    #2
    Re: Macbook pro 15" 2018. keyboard backlight not working

    Can you see the graphics if you use a flashlight / torch along the front face of the display?

    Keyboard caps key light toggles on / off after boot?

    Comment


      #3
      Re: Macbook pro 15" 2018. keyboard backlight not working

      I Jhabvala completely removed the screen and using an external screen . A new screen is $900

      Comment


        #4
        Re: Macbook pro 15" 2018. keyboard backlight not working

        The Mac is working better with only one monitor. I had to do that because I was reinstalling macOS and it could not log to the external monitor. So I thought let’s remove the MacBook screen and let the Mac see only one screen ( the external monitor ) and it is working perfectly . Much better when the Mac screen was on . But the only thing is that the keyboard Mack light is not working . Is it related to the screen connector?

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          #5
          Re: Macbook pro 15" 2018. keyboard backlight not working

          The previous models use an ambient light sensor in the screen to turn it on/off. Wastes battery if it's daylight, so it's switched off in that case. So with that missing, I'd say that's your issue.

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            #6
            Re: Macbook pro 15" 2018. keyboard backlight not working

            Makes sense.
            Probably this is why it is not working.
            But this is a totally different experience, laptop without a screen
            With a big 25” monitor.
            Much better
            I don’t need to be mobile with it any way .

            Thanks for your reply ����

            Comment


              #7
              Re: Macbook pro 15" 2018. keyboard backlight not working

              You can run a MAC in clamshell mode if the screen is U/S, no need to remove it. Allows you to at least set it up on external monitor, you just need an external USB-C hub that supports HDMI, power pass thru and USB ports etc for keyboard/mouse. You can then set it up in clone display mode, keeping the original display camera if needed.

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                #8
                Re: Macbook pro 15" 2018. keyboard backlight not working

                Originally posted by reformatt View Post
                You can run a MAC in clamshell mode if the screen is U/S, no need to remove it. Allows you to at least set it up on external monitor, you just need an external USB-C hub that supports HDMI, power pass thru and USB ports etc for keyboard/mouse. You can then set it up in clone display mode, keeping the original display camera if needed.
                I have been running it like that for a while, but I had to reinstall the macOS and I messed up something on the reinstall process with the hard drive so the Mac would only start in the original monitor mode. I have tried EVERYTHING to try to get the second screen to show to start my new installation and nothing worked ( I realized later that I had the question mark folder).

                So I figured I should disconnect the monitor cable so that the Mac would see only one monitor and be forced to use.

                And it worked 😁

                I spent a few days trying to get it to work .

                The next question, I am trying to find the circuitry responsible for the keyboard backlight so I would try to force the backlight on.

                There must be a pin in a chip in the Mac that is responsible for turning the backlight on.

                If someone knows I would really appreciate it .

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