lenovo x1 carbon 6th gen bios 20KG

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  • MaxonDomkrat
    Lenovo Thinkpad X1 carbon 11th Gen BIOS problem
    by MaxonDomkrat
    Hi everyone.

    I have an engineering sample of a Lenovo ThinkPad X1 Carbon 11th Gen (TYPE 21HM-2FVT05, S/N PF-40G7CD) with an Intel Core i7 1360P (ES – Intel 0000). Since this is an engineering sample, the BIOS had a massive number of various settings. One day, I was experimenting with the BIOS settings and, after saving them, the laptop stopped booting and played a melody after pressing the power button, signaling error code 0002 (Internal bus error), just like in this post: https://www.badcaps.net/forum/troubl...shooting-lapto...
    07-30-2025, 01:27 PM
  • lucaszmn
    Summary of BIOS Whitelist Removal Problem Lenovo Thinkpad T560
    by lucaszmn

    Summary of BIOS Whitelist Removal Problem


    Problem:
    I am attempting to remove the WWAN card whitelist from my Lenovo ThinkPad T560.
    Initial Findings:
    • My current BIOS version is N1KET58W (1.45).
    • I have a CH341A programmer and have successfully created two full backups of my BIOS.
    • I have the ability to use command-line tools on a Linux machine.
    Troubleshooting Steps & Conclusions:
    • I attempted to use several automated and manual patching methods on my N1KET58W (1.45) BIOS, including using hex strings. These attempts all failed.
    • I concluded that the
    ...
    08-12-2025, 03:01 PM
  • Wahaz
    Lenovo Thinkbook 15 G2 ITL i5 (serial number: MP2BFZEF) bios request
    by Wahaz
    Hello,

    I have a Lenovo Thinkbook 15 G2 ITL i5 Laptop (serial number: MP2BFZEF) that when I turn it on, the led on the power button lights up for 5 seconds, then goes out. There's no display and nothing happens.
    So I thought it was a Bios problem.
    I found 3 bios chips on the board, which I read with a bios programmer: two XMC model bios chips and a Winbond model bios chip. Each XMC model bios chip has two partitions named XM25QH128A [3.3V] and XT25F128A [3.3V]. And the Winbond model bios chip has three partitions named W25Q80BL 3.3V, W25Q80xV 3.3V and W25Q80DV 3.3V....
    10-30-2023, 08:42 PM
  • grimacelord
    Lenovo Legion T5-26AMR5 Desktop - Corrupt BIOS
    by grimacelord
    Hello there.

    I am working on a Lenovo Legion T5-26AMR5 desktop that currently has a corrupt BIOS and I have been unsuccessful thus far in trying to fix it myself.

    History:

    1. This computer came to me initially with an error message that said "BiInitializeLibrary failed 0xc0000001" or "0135 fan error". It would always be one of the two errors. It should be noted that when it produced the fan error, there was no physical problem with the fans. They were all spinning just fine.

    I searched for this error online and discovered...
    03-15-2023, 03:29 PM
  • to5it0
    Need Clean BIOS/EC Bin File for Lenovo ThinkPad Yoga 11e 2H1703-27220F Rev. A Marked as U2501 on the motherboard.
    by to5it0
    Need Clean BIOS/EC Bin File for Lenovo ThinkPad Yoga 11e - Stuck with 0275 Error CMS

    Hello everyone,

    I am attempting a repair on a Lenovo ThinkPad Yoga 11e that is currently stuck at boot with the error: "0275 error CMS" even after setup new bios battery and will not allow me to enter the BIOS/Setup.

    This is a critical issue that I believe requires flashing the BIOS chip directly using a programmer (e.g., CH341A/RT809H), as standard software updates or resets are not possible.

    I have opened the laptop and identified the main BIOS chip...
    2 Photos
    10-24-2025, 01:35 AM
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