Macbook A1466 - no backlight

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  • survivalbloke
    Badcaps Veteran
    • Aug 2021
    • 280
    • United States

    #1

    Macbook A1466 - no backlight

    MacBook Air A1466 board 820-000165 - I've got no backlight. Backlight fuse is fine, and I've got 8.5v on that one. I replaced the backlight driver with one from a donor board but no results. I've also swapped the screen but still no backlight. What else can be checked?
  • dellxps15
    Badcaps Legend
    • Feb 2014
    • 1588
    • italy

    #2
    Re: Macbook A1466 - no backlight

    check voltage on d7701 both side.
    check lvds connector pin 3-4 if are ok or have oxidized and move from place.


    edit: u sure no backlight ? ( u can see folder icon or os loading )? if screen is totally black can be also braindead.
    check if usb pendrive led blink when ocnnected if ur not sure if its backlight poroblem only.
    Last edited by dellxps15; 05-24-2023, 03:50 PM.

    Comment

    • reformatt
      Badcaps Legend
      • Feb 2020
      • 1401
      • Australia

      #3
      Re: Macbook A1466 - no backlight

      Try a new backlight IC rather than a donor. Reballing these is a pain, they are pretty cheap so I don't bother. 8.5V shows that at least the BL is enabled, just the 25V boost isn't working. Also check pin 5 under the IC for continuity to D7701.

      Comment

      • piernov
        Super Moderator
        • Jan 2016
        • 4435
        • France

        #4
        Re: Macbook A1466 - no backlight

        https://logi.wiki/index.php/Backlight_Troubleshooting
        OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment

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