ASUS X555DG Overheating cpu mosfet when using dc power supply

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  • julianmustofa
    Member
    • Dec 2021
    • 39
    • indonesia
    #1

    ASUS X555DG Overheating cpu mosfet when using dc power supply

    Hi all i've been working on a laptop that overheating on cpu mosfet only when using dc power supply
    Its not overheating if using battery power.
    Laptop type ASUS X555DG
    Did some rails on dc supply fails? Its hit over 80 degree at mosfet. And cpu got arround 70°ish. the fan kicking at max at this moments
    Attached Files
    Last edited by SMDFlea; 08-07-2022, 08:54 PM.
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 31090
      • Albion
      #2
      Re: Overheating cpu mosfet when using dc power supply

      try a different psu or scope the one you have - if it has bad caps then the ripple will stress the parts in the laptop

        Comment

        • julianmustofa
          Member
          • Dec 2021
          • 39
          • indonesia
          #3
          Re: Overheating cpu mosfet when using dc power supply

          Originally posted by stj
          try a different psu or scope the one you have - if it has bad caps then the ripple will stress the parts in the laptop
          Found the issue. The cpu temperature sensor is not working. Thats why cpu run max speed and stressing the mosfet

            Comment

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