Macbook pro 15" 2018. keyboard backlight not working

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  • wkholi
    Member
    • Jun 2021
    • 20
    • Egypt
    #1

    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
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 13897
      • Canada
      #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

        • wkholi
          Member
          • Jun 2021
          • 20
          • Egypt
          #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

            • wkholi
              Member
              • Jun 2021
              • 20
              • Egypt
              #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?

                Comment

                • reformatt
                  Badcaps Legend
                  • Feb 2020
                  • 1399
                  • Australia
                  #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.

                    Comment

                    • wkholi
                      Member
                      • Jun 2021
                      • 20
                      • Egypt
                      #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

                        • reformatt
                          Badcaps Legend
                          • Feb 2020
                          • 1399
                          • Australia
                          #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.

                            Comment

                            • wkholi
                              Member
                              • Jun 2021
                              • 20
                              • Egypt
                              #8
                              Re: Macbook pro 15" 2018. keyboard backlight not working

                              Originally posted by reformatt
                              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 .

                                Comment

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