Lenovo 15arh05h 82b1 NM-D281 Rev 1.0 2020

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  • Lenovochris
    Member
    • Aug 2024
    • 47
    • United Kingdom
    #1

    Lenovo 15arh05h 82b1 NM-D281 Rev 1.0 2020

    Lenovo 15ARH05H Does not power on. 20v at charging port
    Right Capacitor is getting too hot to touch around PU2001
    Most surrounding caps have 0 resistance

    Bottom cap reads nothing as well as the 2.2 resistor


    2 caps on right reads no resistance

    top capacitors read nothing
    big cap on left of chip reads 000.8
    I'm not great but i'm trying to learn.

    Can someone point me on where i should be looking to target the correct faulty component

    Would a shorting capacitor stop the laptop from showing any signs of life

    Attached some pics for reference
    Attached Files
    Tags: None
    • Darklimax
      New Member
      • Mar 2025
      • 4
      • Dominican Republic
      #2
      The first thing you should do is measure the sense resistance after the high and low MOSFET. If you have a short there, then it means that you could have problems before the capacitor resistance or some MOSFET. The fact that this component is hot does not mean that it is damaged.

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