How to flash Lenovo Yoga Book that doesn't boot into the OS?

  • I've acquired a Lenovo Yoga Book (YB1-X90F) that doesn't boot into the OS. I can access the bootloader and recovery environment.

    I've followed the guide over at that uses Intel Platform Flash Tool, but I get errors straight away. Another person has the same problem--2nd to last poster.:

    02/20/22 15:54:20.155  ERROR  : [Port 1/7] Command `"C:\Program Files (x86)\Intel\Platform Flash Tool Lite\fastboot.exe" "-s"
    "YETIDD2E4EC8" "flashing" "unlock"` failed
    02/20/22 15:54:20.155  ERROR  : [Port 1/7] Flash failed (Command type: Fastboot)

    I've also installed Minimal ADB and Fastboot but I don't know what I'm doing.

    C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot devices
    YETIDD2E4EC8    fastboot

    C:\Program Files (x86)\Minimal ADB and Fastboot>adb devices List of
    devices attached

    C:\Program Files (x86)\Minimal ADB and Fastboot>

    The ROM I got ( from some random site includes what looks like some info or installation steps in the .zip, but even with Word auto-translation into Chinglish, I don't understand what is being said.



    Any input would be greatly appreciated.

  • Solved. I ran 'flash_update_from_user.json

    Just waiting for the battery to charge to 30% to hopefully enable the Halo Keyboard.

    Here are the files needed in case other links void in the future:

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