Thinkpad T495 locked BIOS

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  • kicker12
    Member
    • Jul 2022
    • 18
    • Italy
    #1

    Thinkpad T495 locked BIOS

    Hey! I have a T495 with BIOS password... I tried the LPC bus shorting BUT I haven't been able to get it to work (tamper error, asking for password, various errors): I guess I have now tried thousand times...

    Hence... Here is its BIOS dump: anyone willing to check/help??? MANY THANKS!

    Model: Thinkpad T495
    Motherboard: NM-C131
    Serial Number: PF-1TG5RR
    Attached Files
    Tags: None
    • Maxpower3
      Bad Veteran
      • Feb 2018
      • 1253
      • France
      #2
      Originally posted by kicker12
      Hey! I have a T495 with BIOS password... I tried the LPC bus shorting BUT I haven't been able to get it to work (tamper error, asking for password, various errors): I guess I have now tried thousand times...

      Hence... Here is its BIOS dump: anyone willing to check/help??? MANY THANKS!

      Model: Thinkpad T495
      Motherboard: NM-C131
      Serial Number: PF-1TG5RR
      try
      Attached Files

        Comment

        • kicker12
          Member
          • Jul 2022
          • 18
          • Italy
          #3
          Originally posted by Maxpower3

          try
          Thanks Maxpower3!
          Unfortunately that has not fixed the issue: password still there... :-(((

            Comment

            • Maxpower3
              Bad Veteran
              • Feb 2018
              • 1253
              • France
              #4
              Originally posted by kicker12

              Thanks Maxpower3!
              Unfortunately that has not fixed the issue: password still there... :-(((
              Weird
              Did you use the patched file?
              Did it work?

              what password logo
              Last edited by Maxpower3; Yesterday, 07:34 AM.

                Comment

                • kicker12
                  Member
                  • Jul 2022
                  • 18
                  • Italy
                  #5
                  Originally posted by Maxpower3

                  Weird
                  Did you use the patched file?
                  Did it work?

                  what password logo
                  Yes, I have tried rhebpatched file... Same behaviour as before... I am starting to guess there are different issues on the motherboard...

                    Comment

                    • Maxpower3
                      Bad Veteran
                      • Feb 2018
                      • 1253
                      • France
                      #6
                      Originally posted by kicker12

                      Yes, I have tried rhebpatched file... Same behaviour as before... I am starting to guess there are different issues on the motherboard...
                      I don't understand anything! Did you do that??


                      [ HOW TO USE THE PATCH ]
                      STEP 1: Flash and replace current BIOS with the generated patch file
                      STEP 2: Boot the machine
                      STEP 3: Press ENTER/F1/etc. to enter BIOS settings
                      STEP 4: Enter any character when asked for Supervisor Password
                      STEP 5: Press enter when it shows Hardware ID
                      STEP 6: Press space bar 2x when asked
                      STEP 7: Turn off machine
                      STEP 8: Restore original BIOS
                      STEP 9: Reset BIOS settings to factory default

                      [ NOTES ]
                      When booting the patched BIOS you might have to:
                      - Hold the anti-tamper switch down the whole time (use tape)
                      - Remove the hard disk or replace it with a locked one​

                        Comment

                        • kicker12
                          Member
                          • Jul 2022
                          • 18
                          • Italy
                          #7
                          Originally posted by Maxpower3

                          I don't understand anything! Did you do that??


                          [ HOW TO USE THE PATCH ]
                          STEP 1: Flash and replace current BIOS with the generated patch file
                          STEP 2: Boot the machine
                          STEP 3: Press ENTER/F1/etc. to enter BIOS settings
                          STEP 4: Enter any character when asked for Supervisor Password
                          STEP 5: Press enter when it shows Hardware ID
                          STEP 6: Press space bar 2x when asked
                          STEP 7: Turn off machine
                          STEP 8: Restore original BIOS
                          STEP 9: Reset BIOS settings to factory default

                          [ NOTES ]
                          When booting the patched BIOS you might have to:
                          - Hold the anti-tamper switch down the whole time (use tape)
                          - Remove the hard disk or replace it with a locked one
                          Yes, patched BIOS flashed... Bottom tamper switch held down... I start the motherboard, Lenovo logo shows up... Then immediately says "bottom tamper error - press esc to continue", than ask for supervisor password.. Note: I am not pressing any key from the keyboard during power on phase, NO SSD connected.

                            Comment

                            • kicker12
                              Member
                              • Jul 2022
                              • 18
                              • Italy
                              #8
                              Ok... Tried again... This time took my time and trued to do everything slowly... I guess I have made the same things/steps as first time but obviously NOT because this time it worked!!! Thanks a lot Maxpower3, I owe you 495 beers!!! 🍺

                                Comment

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