Lenovo Legion 5 Pro 16ACH6H NM-562 No Power

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    ORIGINAL POWER SUPPLY BOARD
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  • tommy97
    Lenovo legion 7 16achg6 - no power
    by tommy97
    Hi,

    i've got problem with Lenovo legion 7 16achg6 - no power, laptop on lab PSU does not draw any power/does not power on. While on original charger, laptop does show battery charge(orange led). After power button, top LED's are lighting up - CPU/GPU cold, only heat comes from battery mosfets (up to 45degree, which seems normal on this laptop). Checked First mosfets - correct reading Source and drain 20V - Gate 26.3V. Battery 15.4V, Bios 1.8V, Power button 3.3v. Checked on different BIOS - no change.

    Board model: NM-D563 Rev 2.0 (AMD Ryzen...
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  • GLISIT
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    by GLISIT
    Hi all,

    TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!


    I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!

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  • ktmmotocross
    Lenovo Legion 5 Pro 16ACH6H bad crystal?, but now wont program. connection lost after 5 seconds
    by ktmmotocross
    Hello.
    Have this Lenovo Legion 5 Pro 16ACH6H that came with no start, only powerbutton light. i reflash bios and ec. no change. i replace one of soc cpu crystals and laptop start to work. but when i assemble it, keyboard not work. so i reflash back bios but when i try to reflash ec i get write error and now i connect to it but always read/write error and connection lost after 5 seconds.
    IC is ITE8277E - 256 programmer is vertyanov. i try to change back that crystal but still the same

    Lenovo Legion 5 Pro 16ACH6H
    NM-D562 rev3.0
    sn- PF31EESB

    any ...
    01-22-2024, 05:33 AM
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