Thinkpad E14 black screen

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  • garfild
    Member
    • Aug 2020
    • 26
    • CZ
    #1

    Thinkpad E14 black screen

    Hello guys,
    I got laptop E14 as non-working.

    type: 20RA001EMC
    motherboard: NM-C421


    Laptop reacts to the power button, but no picture, no vcore. I dumped bios, cleared ME but no impact. I pushed bios from slighlty different E15 laptop cleared here on forum. Laptop went alive, vcore on, picture showed:
    0271: check date and time
    0183: bad CRC of security settings in Efi
    bios is under password.

    Then I rutned off laptop, turn on again and it returned to 1st state - no picture, no vcore. Then I experimented with various BIOSes (E14, E15, cleared ME,..) without any particular result - black screen, no vcore. After multiple flashes Iam sometimes able to reach error screen with 0271 and 0183 but its aprox 1 out of 5 flashes..
    I uploaded both bioses - original dump and working for a while.

    Iam little bit lost, Iam not able to 100% replicate even the error screen. Do you have any idea, what would be the suggestions? EC chip itself?

    thank you for any hint
    Attached Files
    Tags: None
    • SMDFlea
      Super Moderator
      • Jan 2018
      • 20619
      • UK
      #2
      Re: Thinkpad E14 black screen

      Originally posted by garfild
      Hello guys,
      I got laptop E14 as non-working.

      thank you for any hint
      try this bios, see if the error messages are gone
      Attached Files
      All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

        Comment

        • garfild
          Member
          • Aug 2020
          • 26
          • CZ
          #3
          Re: Thinkpad E14 black screen

          Originally posted by SMDFlea
          try this bios, see if the error messages are gone
          Hello!,
          yes still shows error during the posting unfortunately. Do you know if there is any chance to remove password besides read out directly EC? Autoscript does not work...

            Comment

            • SMDFlea
              Super Moderator
              • Jan 2018
              • 20619
              • UK
              #4
              Re: Thinkpad E14 black screen

              Originally posted by garfild
              Hello!,
              yes still shows error during the posting unfortunately. Do you know if there is any chance to remove password besides read out directly EC? Autoscript does not work...
              This thread might help - https://www.badcaps.net/forum/showthread.php?t=104478 .Ec or patching,i don`t know which one will work. Some of the errors can be solved with the lenovo maintenance disk or other DMI tools
              All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                Comment

                • garfild
                  Member
                  • Aug 2020
                  • 26
                  • CZ
                  #5
                  Re: Thinkpad E14 black screen

                  Originally posted by SMDFlea
                  This thread might help - https://www.badcaps.net/forum/showthread.php?t=104478 .Ec or patching,i don`t know which one will work. Some of the errors can be solved with the lenovo maintenance disk or other DMI tools
                  yes, this I went trough, unfortunately DXE driver (autopatcher) not working for this and I do not ahve programming device for EC. Probably need to wait until "the successor" will arrive.

                    Comment

                    • garfild
                      Member
                      • Aug 2020
                      • 26
                      • CZ
                      #6
                      Re: Thinkpad E14 black screen

                      Behold! The Successor!

                      IT8227E dump attached, can somebody remove the password pls?
                      Attached Files

                        Comment

                        • garfild
                          Member
                          • Aug 2020
                          • 26
                          • CZ
                          #7
                          Re: Thinkpad E14 black screen

                          fixed! thank you all for your helps and tutorials on forum

                            Comment

                            • SMDFlea
                              Super Moderator
                              • Jan 2018
                              • 20619
                              • UK
                              #8
                              Re: Thinkpad E14 black screen

                              Originally posted by garfild
                              fixed! thank you all for your helps and tutorials on forum
                              Thanks for the follow up,i`m glad you fixed it
                              All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                                Comment

                                • Auridice
                                  New Member
                                  • Jan 2018
                                  • 5
                                  • Ucayali
                                  #9
                                  Re: Thinkpad E14 black screen

                                  Bios Original NM-C421
                                  Attached Files

                                    Comment

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