T470S - TPM issue since TPM/BIOS update from Windows Update

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  • T4-BR
    New Member
    • Sep 2024
    • 6
    • France
    #1

    T470S - TPM issue since TPM/BIOS update from Windows Update


    Hello,

    Many thanks for the high quality ressources available on your website.

    I'm currently facing some issues with my T470S:

    - I sat a Supervisor Password using special chars which was causing issues
    - Access to BIOS was locked but I was still able to use my PC

    2 weeks ago, I got an update of BIOS/TPM from Windows Update.

    Computer restarted and after Lenovo logo a loading bar appeared and at the end something went wrong + an error popped.

    Computer restarted one more time and I got the prompt for typing Bitlocker password.

    I managed to boot into Windows and saw that TPM wasn't working anymore. PC in sleep mode would sometime beep with the code 0285.


    Since I was locked from accessing the bios I used the patch unlock supervisor password and successfully managed to go to BIOS but Security Chip option is missing.
    I tried using the TPM Updater from Lenovo and reported version is 0.0.

    Do you have any idea to fix that ? Thank you !

    ​
    Tags: None
    • rogfanther
      Badcaps Veteran
      • Jul 2006
      • 458
      • Brazil
      #2
      Try removing all passwords from bios, then download and run bios update from Lenovo site

        Comment

        • T4-BR
          New Member
          • Sep 2024
          • 6
          • France
          #3
          Hi! Thanks for your answer!

          i already removed all passwords from bios. I tried to update the bios again, but the update program won’t flash because they are the same versions.

            Comment

            • SMDFlea
              Super Moderator
              • Jan 2018
              • 20745
              • UK
              #4
              Originally posted by T4-BR
              Hi! Thanks for your answer!

              i already removed all passwords from bios. I tried to update the bios again, but the update program won’t flash because they are the same versions.
              post the original bios backup, and the laptop serial number.
              All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                Comment

                • T4-BR
                  New Member
                  • Sep 2024
                  • 6
                  • France
                  #5
                  Originally posted by SMDFlea

                  post the original bios backup, and the laptop serial number.
                  Thank you for your help ! Here is my original backup bios.

                  My serial number is : PC0TZQ3L
                  Attached Files

                    Comment

                    • T4-BR
                      New Member
                      • Sep 2024
                      • 6
                      • France
                      #6
                      Originally posted by SMDFlea

                      post the original bios backup, and the laptop serial number.
                      I don’t know if it could help, but shutdown from Windows is not working and is only locking the session.

                      Sleep mode put the PC in a weird state. If i push the button I get the beep code for TCG error and I can only reboot…

                      any idea?

                      thanks in advance!

                        Comment

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