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Supervisor password on Lenovo T490 and T490s

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    #81
    Originally posted by Rexer Anthony View Post
    Re: Supervisor password on Lenovo T490 and T490s

    LENOVO THINKPAD
    T490 T590 FT490 FT492 FT590 FP531 NM-B901 REV 1
    this main supports all the models above and the MEC is also unlocked.
    tested bios display but cannot to change serial number with lenovo uone/lenovo golden key,or maintenance disket 1.89,any solution for change serial number? thank you

    Comment


      #82
      Originally posted by jozlar View Post
      please help mec unnlock
      Follow this steps i made

      https://www.badcaps.net/forum/troubl...e4#post3342869

      Comment


        #83
        Originally posted by jomerfx28 View Post
        why do all that, when a clean of Mec eprom enough, without having used the lenovo utility

        and already unlocked​

        Cliquez sur l'image pour la voir en taille r?elle   Nom : 		image.png  Affichages :	0  Taille :		21,2 Ko  ID : 			3342881
        Last edited by Maxpower3; 09-03-2024, 09:51 AM.

        Comment


          #84
          Have you tested this method on P53s 20N6 Serial number PF292CDY? I can't find the schematics for this motherboard, and it seems different from the P53. Thank you!

          Comment


            #85
            Hi.

            I have a Lenovo T490 (S/N PF-1DN15F / Type 20N3-S1J700) laptop that requests fingerprint authentication or password when powered on:

            Click image for larger version

Name:	fingerprint.png
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ID:	3492388 Click image for larger version

Name:	password.png
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Size:	402.1 KB
ID:	3492389

            I've tried to unlock the laptop by following the instructions posted here and here, but so far I've had no luck.

            I bought an RT809H programmer and:
            • Installed the iFix Programmer Software version 20240116
            • Disassembled the laptop and removed the motherboard
            • Removed the CMOS Battery
            • Moved the 10K resistor to a new location
            Click image for larger version

Name:	resistor.jpg
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ID:	3492391
            • Soldered 5 wires (TMS, TDI, TDO, TCK, GND) from JTAG1 in the motherboard, to the RT809H programmer
            Click image for larger version

Name:	motherboard 1.png
Views:	355
Size:	3.11 MB
ID:	3492392 Click image for larger version

Name:	motherboard 2.png
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Size:	453.1 KB
ID:	3492393
            • Connected the Laptop A/C Adapter to the motherboard so that it has power (I don't try to "turn the laptop on" by pressing any button)
            • Tried to read the chip from the Programmer software using the SMSC MEC1633_256K Partnumber (Also tried MEC1633 #ISP)
            Whenever I try to read the chip from the programmer, I get this error:

            Click image for larger version

Name:	sofwtare.png
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ID:	3492390

            MEC Chip ID: 0xFFFFFFFF
            ID verification error.
            Also, If I try to auto detect the chip, I get:

            Click image for larger version

Name:	autodetect 1.png
Views:	397
Size:	17.9 KB
ID:	3492394 Click image for larger version

Name:	autodetect 2.png
Views:	350
Size:	65.1 KB
ID:	3492395


            Why is it not working? 🤔
            Attached Files

            Comment


              #86
              hello guys,

              I have a lenovo t490 i7 notebook.

              is there a way to change the password on the lenovo t490 without soldering the motherboard?
              At least a procedure to try before soldering motherboard...

              Thanks for your reply.

              Comment


                #87
                Hello , I hope someone can help me. I have an Lenovo T490 with motherboard FT490/FT492/FT590/FP531 NM-B901 Rev:1.0 2018-12-28. This laptop looks to have an bios supervisor password because if i type enter it shows bios information but I cant edit anything. My question is if this is posible to clear that password. And it some one can tell me the steps if posible. Thank you!

                Comment


                  #88
                  Originally posted by juanespty View Post
                  Hi.

                  I have a Lenovo T490 (S/N PF-1DN15F / Type 20N3-S1J700) laptop that requests fingerprint authentication or password when powered on:
                  Why is it not working? 🤔

                  Maybe you could try to follow this guy's Mec1663Clearpassword dump.

                  https://www.badcaps.net/forum/troubl...e4#post3203421

                  Using Mec1633_256K, you can't used auto detect IC on that, because its a MEC1663
                  Last edited by SMDFlea; 12-12-2024, 11:38 AM. Reason: edit full quote

                  Comment


                    #89
                    I need your help, can anyone help me open the locked bios file? I've tried several dumps here and there is no power
                    TYPE: T490
                    CODE:NM-B901
                    S/N:PF1VJMDX
                    THANK YOU
                    Attached Files

                    Comment


                      #90
                      Originally posted by qwerty4512

                      PLEASE HELP ME
                      Password on MEC1663 IC
                      Pls Use Veryanov or RT809H to unlock the passoword

                      Comment

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