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Need help rewrite Lenovo T490s System board serial number

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    #1

    Need help rewrite Lenovo T490s System board serial number

    Hi. Lenovo T490s. Need remove bios password. I removed it by erase mec, but now can not repair System board serial number. Can anybody say what lenght it must be? Serial number and modelr repair sucefull, but neet repair it, because show INVALID. Thnaks
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    Last edited by SMDFlea; 05-09-2023, 06:26 AM. Reason: added "T490s" to thread title
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    #2
    Re: Need help rewrite Lenovo System board serial number

    Originally posted by stylius View Post
    Hi. Lenovo T490s. Need remove bios password. I removed it by erase mec, but now can not repair System board serial number. Can anybody say what lenght it must be? Serial number and modelr repair sucefull, but neet repair it, because show INVALID. Thnaks
    seek, and you will find https://www.badcaps.net/forum/showth...t=Lenovo+T490s

    .
    Last edited by SMDFlea; 05-09-2023, 06:28 AM.
    All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

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      #3
      Re: Need help rewrite Lenovo T490s System board serial number

      I do all this, i can not solve only board serial number.

      Comment

        #4
        Re: Need help rewrite Lenovo T490s System board serial number

        same problem here: I know that you can enter the system board serial number by using the B0 option, but I don't know the syntax of the expected string. It's not just the system board serial number.

        Comment

          #5
          Hello, I unlocked my first t490s with RT809H Programmer

          Now its unlocked but I am unable to edit anything back in to the bios setup
          I have tried ThinkPad Config Information Update Utility v1.11 - n1ctm07w(v1.11)
          and a few other apps I keep getting , The string length of the argument is not correct.

          I took a picture before unlocking I have all the right info to put back.

          Anyone know what I am doing wrong I have been at it all day trying to do this

          any help would be great thanks.


          Click image for larger version Name: string length.jpg Views: 267 Size: 149.0 KB ID: 3161027


          Click image for larger version Name: unnamed2.png Views: 383 Size: 1.89 MB ID: 3161026

          Comment

          • Dan20701
            #5.1
            Dan20701 commented
            12-11-2023, 01:00 PM
            Editing a comment
            Do I need to leave the 10k in program mode?
          #6
          I have got it to work now, I am just having problems setting the system board serial number, got it down to 1 beep.

          Comment

          • Maxpower3
            #6.1
            Maxpower3 commented
            12-11-2023, 03:16 PM
            Editing a comment
            you must put long number, not just serial
            You need to make a copy before unlocking. Make a photo or save it is better.
            Last edited by Maxpower3; 12-11-2023, 03:19 PM.
          #7
          Hello Maxpower3, where would I have found this long number or how do I make it up?
          I have looked in the 256mb main bios and the same number I have is in there too its no longer.
          I found how to do the other with the 1S and type 20NY then the S:N. I am struggling with this other one.
          Thanks.

          Click image for larger version Name: Screenshot 2023-12-12 000141.png Views: 237 Size: 131.5 KB ID: 3161170

          Comment

            #8
            with barcode on bottom
            Click image for larger version Name: 406334186_767932075172612_7160169050921172100_n.jpg Views: 2 Size: 283.9 KB ID: 3161270
            Last edited by Maxpower3; 12-12-2023, 12:28 AM.

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              #9
              Hello mate I don't think you been understanding me, its the system board serial number I need help with.
              how do I do that one mate. Thanks.

              Click image for larger version Name: Screenshot 2023-12-12 090525.png Views: 225 Size: 257.5 KB ID: 3161339

              Comment

                #10
                Its took me a long time but I am now done thank you, its all sorted and working good.

                Comment

                  #11
                  Originally posted by Dan20701 View Post
                  Its took me a long time but I am now done thank you, its all sorted and working good.
                  Well maybe share it for others so they know how to fix the problem rather then just saying you sorted it after a long time

                  Comment

                    #12
                    (01) Add your Serial Number.

                    Put, 1S, In front, Then the, Type from the sticker, 20NY S11B00, Then the Serial Number, PC1BBS4M

                    1S 20NY S11B00 PC1BBS4M (No Spacers)

                    (02) Set the Laptop Name, ThinkPad T490s

                    (03) You will find an option to assign UUID which will automatically update the system board serial number.

                    Worked for me there is no more beeps on bootup. Thanks for you info.

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