Repair Fujitsu U939X/A BIOS

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  • mikinana64
    New Member
    • Oct 2025
    • 5
    • Indonesia
    #1

    Repair Fujitsu U939X/A BIOS

    Hello, my laptop is now completely bricked after updated the fresh install Windows 10 Pro.
    It wont ever response to charger and LED completely off after 0.1s

    When i tried reflash my dumped with ME clean BIOS and EC extracted from Outimage.bin, LED is now working and battery can charging. But will hard reboot every 3s with WiFi blinking twice, and it can't even turn on.

    I tried download BIOS from their website, but the file .UPD (25,6 MB) size is exceed my splitted BIOS (24,0 MB)

    Here is my dump BIOS from 128Mb, 64Mb and 8Mb chip. Thank you

    Fujitsu U939X/A
    Model: FMVU20012
    Type: FJNB2D1
    Serial: R0100701
    Attached Files
    Tags: None
    • hoaca388
      Badcaps
      • Jan 2022
      • 12316
      • Socialist Republic of Vietnam
      #2
      Originally posted by mikinana64
      Hello, my laptop is now completely bricked after updated the fresh install Windows 10 Pro.
      It wont ever response to charger and LED completely off after 0.1s

      When i tried reflash my dumped with ME clean BIOS and EC extracted from Outimage.bin, LED is now working and battery can charging. But will hard reboot every 3s with WiFi blinking twice, and it can't even turn on.

      I tried download BIOS from their website, but the file .UPD (25,6 MB) size is exceed my splitted BIOS (24,0 MB)

      Here is my dump BIOS from 128Mb, 64Mb and 8Mb chip. Thank you

      Fujitsu U939X/A
      Model: FMVU20012
      Type: FJNB2D1
      Serial: R0100701
      LIFEBOOK U939X

      Attached Files
      ↵
      Any donations to badcaps are welcome, click this link to donate . Thanks to all the supporters
      ​https://www.badcaps.net/donate

        Comment

        • mikinana64
          New Member
          • Oct 2025
          • 5
          • Indonesia
          #3
          Originally posted by hoaca388
          LIFEBOOK U939X
          Thank you, it has different result from before.

          Now it's stuck at this three LED without blinking, capslock numlock and scroll lock is blinking.
          The side of CPU is warm, it took 4W from charger while in that state

          When i did force shutdown from button, and repluig the charger, only battery LED now turn on and no response from any button.
          EC chip is 0V now and 0W is taken from charger

          Attached Files

            Comment

            • mikinana64
              New Member
              • Oct 2025
              • 5
              • Indonesia
              #4
              Now i have the first problem just like before re-flasing the BIOS (which result 3s turn off)
              LED instantly turn off after 0.1s when plugged in power

              Tried verify EC chip memory and it passed, should i re-flash above BIOS again and wait while it took 4W?

                Comment

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