ThinkPad X1 Yoga Gen 6 series fault

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  • rediii
    h???, spurrrn
    • Mar 2018
    • 485
    • somewhere in europe

    #1

    ThinkPad X1 Yoga Gen 6 series fault

    - it is urgently recommended to update the bios to the latest version to prevent this series fault!
    - repaired 20 of them: in some cases all three chips have had to be replaced
    - all parts ordered here: mouser.com

    - exploded next gen fet (mainly used usb c port - replace it) - 20 times (15 times this was the only fault)
    TPD4S311YBFR
    TI USB Interface IC
    US HTS:8542390001 ECCN:EAR99 COO:PH
    - exploded ov protection ic
    FPF3380UCX
    onsemi Power Switch ICs - Power Distribution
    TARIC:8542399000 ECCN:EAR99 COO:PH
    -> you can use the predecessor (that fails in many x1 yoga gen 5 models for no reason, so maybe install the next gen one (5 V only on charger: FPF2281BUCX)
    - failed protection ic (only one side of usb c jack was charging in "off state")
    CSD87501L
    TI MOSFET
    TARIC:8542399000 ECCN:EAR99 COO:CN

    - damage under the ti fet can be very bad and you may need to reconstruct pads

    Happy repairing!

    in addtition: you need to be aware of the underfill near and under the ti fets (scrape it away while blowing mid air, ap. 250 °C; these fets are NOT classic bga chips - they are firmly pressed on the pcb)
    Last edited by rediii; 05-01-2024, 10:37 AM.
  • stevie
    Member
    • Apr 2010
    • 30

    #2
    hi could you help with a problem i have

    i have a X1 Yoga Gen 6 i removed U49 then read it and saved the bin file , then i wrote the bin fie to another winbond 256 and checked that it wrote the identical file ok to the
    new chip but it always comes up with reading ME firmware and Failed to recover ME firmware also when i look in the bios setup the ME firmware is always missing
    if i put the original chip in the ME firmware is displayed my question is does the X1 yoga winbond have a different serial no as the chips were identical i even checked with file compare

    and there were no differences also i read the config and just QE was ticked in the config box

    Comment

    • rediii
      h???, spurrrn
      • Mar 2018
      • 485
      • somewhere in europe

      #3
      Originally posted by stevie
      hi could you help with a problem i have

      i have a X1 Yoga Gen 6 i removed U49 then read it and saved the bin file , then i wrote the bin fie to another winbond 256 and checked that it wrote the identical file ok to the
      new chip but it always comes up with reading ME firmware and Failed to recover ME firmware also when i look in the bios setup the ME firmware is always missing
      if i put the original chip in the ME firmware is displayed my question is does the X1 yoga winbond have a different serial no as the chips were identical i even checked with file compare

      and there were no differences also i read the config and just QE was ticked in the config box

      which chips did you use?

      are you sure the checksum was correct?

      did you do a bios reset afterwards?

      did you load bios defaults?

      Comment

      • rediii
        h???, spurrrn
        • Mar 2018
        • 485
        • somewhere in europe

        #4
        this fault is affecting a lot of x1 yoga gen 6 and x1 carbon gen 9 AND ABOVE

        Comment

        • Andreasbest
          Badcaps Legend
          • Aug 2014
          • 1132
          • Hellas ( Greece )

          #5
          Originally posted by rediii
          this fault is affecting a lot of x1 yoga gen 6 and x1 carbon gen 9 AND ABOVE
          So i have to strip off the board to check all chips.

          Comment

          • Andreasbest
            Badcaps Legend
            • Aug 2014
            • 1132
            • Hellas ( Greece )

            #6
            Where is the TPD4S311YBFR ?
            Can't find it in schematics.

            Comment

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