Acer nitro 5 AN517 battery not charging

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  • nickstyle
    Member
    • Aug 2022
    • 42
    • United Kingdom

    #1

    Acer nitro 5 AN517 battery not charging

    Hi, I got this laptop with a dead GPU and i have replaced the moderboard same model

    The problem the new motherboard does not charge the battery. The faulty motherboard is charging.
    In windows the battery is presend and if i plug in the charger is detected
    All voltages are present
    What i have done :
    -i have replaced the BQ chip
    -i have replaced the IO chip with the IO chip fron the faulty motherboard
    -i have replaced the bios chip with the one from faulty motherboard

    Nothng has changed

    Any other ideea?
  • mon2
    Badcaps Legend
    • Dec 2019
    • 14256
    • Canada

    #2
    With care, measure and post the voltage to ground of each pin on the BQ charger IC for a review. Do attach the power adapter and battery for this review.

    Questions:

    1) Same charger IC part # was used for the replacement?

    2) BQ and other replaced parts are properly soldered onboard?

    3) Is the battery a known good battery? It was the same battery that worked with the fault motherboard?

    Click image for larger version

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    Comment

    • nickstyle
      Member
      • Aug 2022
      • 42
      • United Kingdom

      #3
      Found the problem
      It was so easy but i have spent few hours to find it
      The first mosfet from the power supply circuit was shorted,so it was working like a fuse. I didn`t check as the laptop was working fine.
      Now is charging
      Thank you for your quick answwr

      Comment

      • mon2
        Badcaps Legend
        • Dec 2019
        • 14256
        • Canada

        #4
        Np. Your case is mentioned in the sticky above on charger circuits by piernov. Good job on the repair!!

        Comment

        • nickstyle
          Member
          • Aug 2022
          • 42
          • United Kingdom

          #5
          I did that, first thing before postig but i have missed the part with DC shorted mossfet )
          Thank you

          Comment

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