Lenovo X1 Carbon 7th Gen Type 20R1 BIOS DUMP

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  • mrkmpn
    Senior Member
    • Apr 2022
    • 62
    • United States
    #1

    Lenovo X1 Carbon 7th Gen Type 20R1 BIOS DUMP

    Lenovo X1 Carbon 7th Gen Type 20R1
    SN: PF1Y5BBJ
    Board: GX490 NM-C661 Rev: 1.0

    I have made two dumps of this bios, with the bios chip removed from the board and the hashes match on both dumps, but I cannot find the DMI information in the dumps except for the Windows product key, so I think it is corrupted. I have downloaded two bios updates from the Lenovo support site, but they contain small .PAT file, and 4 subfolders containing .FL1 and .FL2 files, which I don't understand enough to figure out how to use to fix my dump.

    The problem with the laptop is that it will not power on. USB-C meter shows 20v is negotiated, but does not show charging current if battery is connected, and nothing happens when power button is pressed. Any help is greatly appreciated.


    Here is my dump.

    Attached Files
    Tags: None
    • SMDFlea
      Super Moderator
      • Jan 2018
      • 21986
      • UK
      #2
      Only the win key is in the bios,the DMI is in the EC. Seems to me like you`ve got a hardware problem rather than the bios
      All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

        Comment

        • mrkmpn
          Senior Member
          • Apr 2022
          • 62
          • United States
          #3
          Originally posted by SMDFlea
          Only the win key is in the bios,the DMI is in the EC. Seems to me like you`ve got a hardware problem rather than the bios
          Okay, thank you.,

            Comment

            • Zarithya
              Member
              • Oct 2025
              • 11
              • USA
              #4
              Hi all, I have a Lenovo ThinkPad X1 Carbon Gen 7 type 20R1, motherboard model NM-C661 (which is why I believe this is the right thread despite being a Carbon).
              The laptop lost power in the middle of a BIOS update and was (presumably) corrupted. Now it does not turn on at all (no display, no fan), with three flashes of the power LED along with an amber charging LED when plugged in.

              Model: Lenovo ThinkPad X1 Carbon Gen 7
              Type: 20R1-S05A00
              Serial: PF-21E8NG
              Motherboard: NM-C661

              I've attached the dump I was able to take. I was unable to figure out how to extract a flashable file from Lenovo's download, so any help is appreciated.
              Attached Files

                Comment

                • SMDFlea
                  #4.1
                  SMDFlea commented
                  10-29-2025, 05:37 AM
                  Editing a comment
                  post moved to carbon 20R1 topic.
                • m1ch43lzm
                  Badcaps Veteran
                  • Mar 2019
                  • 969
                  • Peru
                  #5
                  Try, BIOS region + EC + clean ME
                  X1 Carbon 7th Gen - (Type 20R1, 20R2) Laptop (ThinkPad) - Type 20R1

                  BIOS ver. N2QET56W
                  ME 14.1.67.2046
                  Win key 12C0000-12CFFFF

                  If BIOS doesn't work please say so, maybe someone else knows how to merge ThinkPad BIOS properly, for type 20R1 the BIOS version should be N2QET**W or N2QET**P
                  Attached Files

                    Comment

                    • Zarithya
                      Member
                      • Oct 2025
                      • 11
                      • USA
                      #6
                      Originally posted by m1ch43lzm
                      Try, BIOS region + EC + clean ME
                      X1 Carbon 7th Gen - (Type 20R1, 20R2) Laptop (ThinkPad) - Type 20R1

                      BIOS ver. N2QET56W
                      ME 14.1.67.2046
                      Win key 12C0000-12CFFFF

                      If BIOS doesn't work please say so, maybe someone else knows how to merge ThinkPad BIOS properly, for type 20R1 the BIOS version should be N2QET**W or N2QET**P
                      Thanks, unfortunately this did not change the behavior. Really starting to suspect the EC now...

                        Comment

                        • reformatt
                          Badcaps Legend
                          • Feb 2020
                          • 1522
                          • Australia
                          #7
                          Try this one. Original BIOS region (which I believe is fine from your original dump), clean ME from same motherboard (CSME is 0x7D4000 in this donor compared to your old one) . Problem is there are no working dumps for this 20R1 that I could find for FIT configuration. Your dump has an error when loaded into FIT so cannot get the config loaded properly.
                          Attached Files
                          Last edited by reformatt; 11-04-2025, 01:50 AM.

                            Comment

                            • Zarithya
                              Member
                              • Oct 2025
                              • 11
                              • USA
                              #8
                              Originally posted by reformatt
                              Try this one. Original BIOS region (which I believe is fine from your original dump), clean ME from same motherboard (CSME is 0x7D4000 in this donor compared to your old one) . Problem is there are no working dumps for this 20R1 that I could find for FIT configuration. Your dump has an error when loaded into FIT so cannot get the config loaded properly.
                              No dice, unfortunately. Same three blinks on the power button.

                                Comment

                                • LBTT1121
                                  Badcaps Legend
                                  • Nov 2024
                                  • 1069
                                  • Việt Nam
                                  #9
                                  Originally posted by Zarithya
                                  No dice, unfortunately. Same three blinks on the power button.
                                  try
                                  Attached Files

                                    Comment

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