Lenovo Thinkpad L15 Gen 3 Power Btn not working Wistron 223030-1

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  • Maxpower3
    Bad Veteran
    • Feb 2018
    • 1224
    • France

    #1

    Lenovo Thinkpad L15 Gen 3 Power Btn not working Wistron 223030-1

    Hello
    Works perfectly except the power button.
    You have to start it with Cmos removal.
    No réaction from the button.
    The lights are présent.
    3V and Gnd are présent on button

    I made a request for the diagram here but it is not available.
    MB Wistron 223030-1
    Ref LG4 LT5 ADL RT UMA MB
    https://www.badcaps.net/forum/troubl...-adl-rt-uma-mb

    after observation and monitoring of traces by continuity.
    I found a place where a component appears to be missing.
    As luck would have it, right next to the M2 plate
    Click image for larger version  Name:	Nouveau Image bitmap (3).png Views:	0 Size:	3.68 MB ID:	3550666

    I'm trying to repair myself with other boardviews with NPCX997.
    I think it is EC_PWRSW


    Click image for larger version  Name:	image.png Views:	0 Size:	147.7 KB ID:	3550713
    Click image for larger version  Name:	image.png Views:	0 Size:	156.4 KB ID:	3550712

    Click image for larger version  Name:	Nouveau Image bitmap (4).png Views:	0 Size:	2.35 MB ID:	3550667
    Now, I'm hesitating on what to put!
    Caps, not possible because no gnd on one side.
    Resistor ?? 10K 100K or others (100k same as boardview)
    Or
    diode
    Thanks for help
    Last edited by Maxpower3; 01-17-2025, 07:36 AM.
  • Maxpower3
    Bad Veteran
    • Feb 2018
    • 1224
    • France

    #2
    Solved with 100K resistor
    Power button work good

    Comment

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