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Lenovo IdeaPad B560: how to flash KBC BIOS (reasons - no power, LED indicators don't work)

Discussion in 'Casie Studies' started by Administrator, Aug 2, 2017.

  1. Administrator

    Administrator Administrator Staff Member

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    Lenovo IdeaPad B560: how to flash KBC BIOS (reasons - no power, LED indicators don't work)

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    Notebook recovery using firmware KBC BIOS (PM25LD010 SOIC-8) and programmer Willem MiniPro TL866A.

    After 8 notebooks (Lenovo B560) in 3 weeks, reached their final destination, a.k.a. my gentle hands (with similar symptoms - doesn't boot, battery doesn't charge, no display), I decided to write this tutorial.



    Device specificationsModel name: 20068
    MB: Wistron LA56 (48.4JW06.011)
    KBC: Nuvoton NPCE781EAODX
    Flash: MXIC MX25L3206E SOIC-8 + PM25LD010 SOIC-8
    Making a diagnosis
    The measurements showed that the patient is fully, ultimately and conclusively dead. After reading the literature on this diagnosis, it turned out to be a standard problem of this model. The KBC firmware often crashes. This firmware resides on a microchip PM25LD010!

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    Necessary tools
    In order to flash crashed BIOS you'll need:

    1. Hot air gun station to desolder microchip PM25LD010.

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    2. BGA gel flux.

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    3. Programmer to flash microchip firmware using SPI interface (in this specific case, Willem TL866A).

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    Repair
    First, you need to desolder the chip from the motherboard.


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    Then put the chip into the adapter.

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    Now, put the adapter (and the chip, of course) onto the programmer.

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    Now you have to download the archive with the firmware (I took it from a working device, now the archive contains both BIOS images) [​IMG] B560_MAIN_KBC.zip 1.81 MB.

    Run the program. To restore the firmware select the desired chip (PM25LD010).

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    Select dump KBC BIOS (B560_KBC_ROM.bin) and run flashing process.

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    After the process is completed solder the chip back.

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    And now, verification test run.

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    Conclusion
    The symptoms of this malfunction differ, but one thing is certain - it's a common problem of this notebook, keep this in mind when making a diagnosis or conducting repairs on Lenovo B560. I hope this was helpful ;).

    Important notice: do not repair or modify this device if it's still under warranty.
     

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