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macbook M3 A2992 820-02918 - No backlight

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  • defdjamel
    Member
    • Jul 2025
    • 20
    • france
    #1

    macbook M3 A2992 820-02918 - No backlight

    no backlight on macbook 14" M3 A2992 820-02918,
    PPVOUT_LUXE : 12V
    BL_PMIC_PWR_EN = 1,2v
    the value is normal for 1.2v ?
    voltage direct on jumper
    is someone already repair this model?
    thanks
    Tags: None
    • davis12
      Member
      • Nov 2012
      • 27
      • denmark
      #2
      anything about this model and issue??

        Comment

        • Skrndelj
          Member
          • Dec 2022
          • 11
          • Serbia
          #3
          What is the voltage ov PPBUS_AON_LUXE?
          You should have 15V on PPVOUT_LUXE, but 14V is also okay.
          Also the chip has an input from 5v_S2, you have 2 0402 caps near the backlight chip that you can measure, Those macs are prone to liquid damage exactly on the connector or backlight chip, also worth mentioning is the TCON on the display might be at fault, did you try with a known good screen?

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