lenovo ideapad s540-13iml no backlight

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  • Nagyesz
    Senior Member
    • May 2024
    • 124
    • Hungary

    #1

    lenovo ideapad s540-13iml no backlight

    Unfortunately, the laptop doesn't have a backlight; the screen is faintly visible. Where should I start investigating the issue?


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  • Answer selected by Nagyesz at 06-26-2024, 03:24 AM.
    Nagyesz
    Senior Member
    • May 2024
    • 124
    • Hungary

    Thank you Mon2!
    I replaced the fuse, and now the backlight is working. I spent about an hour soldering, but it works.

    I just have one more question: can I cover the soldered areas with hot glue to ensure that nothing causes a short circuit?






    Comment

    • Nagyesz
      Senior Member
      • May 2024
      • 124
      • Hungary

      #2
      FG7 pin 1 has 11V but 0.5V pin 2

      Comment

      • mon2
        Badcaps Legend
        • Dec 2019
        • 14025
        • Canada

        #3
        Link the schematics & BV files but only in the schematics forum.

        Check the SMD cap shown here - it looks off color compared to the others.

        Click image for larger version

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        Comment

        • Nagyesz
          Senior Member
          • May 2024
          • 124
          • Hungary

          #4
          Thank you Mon2!
          I replaced the fuse, and now the backlight is working. I spent about an hour soldering, but it works.

          I just have one more question: can I cover the soldered areas with hot glue to ensure that nothing causes a short circuit?






          Comment

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