Thinkpad E15 G2 (AMD) GE420/GE520 NM-C771 REV 1.0

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  • MegaZAC
    Member
    • Oct 2020
    • 49
    • Australia
    #1

    Thinkpad E15 G2 (AMD) GE420/GE520 NM-C771 REV 1.0

    Hi all!

    The laptop has no signs of life at all. The only thing showing any voltage is the BIOS battery. Nothing is heating, nothing takes any charges, no LEDs blink, no reaction on power button. My USB-C meter shows nothing taken, however it starts detecting voltage only above 3.7V.
    These boards have notorious USB-PD chips. I can't even measure what's on their pins because they are just a fraction of mm in size. What I suspect are these chips:

    1) 5457V K8K33H2 GK34CC
    2) RT3663BM GOW 7K834
    3) Lenovo IT8227E-256 2106-CXA Z0043B

    Please, recommend steps to move forward.
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