HP 640 G4 BIOS Security Device Problem

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  • lekvilius
    New Member
    • Jul 2018
    • 3
    • UK
    #1

    HP 640 G4 BIOS Security Device Problem

    Hello!, i've got Hp 640 g4 that recently had bios reflash by someone else due to having password and now when you turn it on after 30 seconds of black screen it posts with message: security device problem. I don't have original bios to flashback and just remove password. Does anyone know how to solve this bios problem? Also serial is different in bios than it is on the bottom cover so maybe that's the problem?
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    • hoaca388
      Badcaps
      • Jan 2022
      • 12441
      • Socialist Republic of Vietnam
      #2
      Re: HP 640 G4 BIOS Security Device Problem

      This error may be caused by incorrect DMI information, try using HP DMI Tool NBDmiFit to declare it again.
      https://www.badcaps.net/forum/showthread.php?t=69204
      ↵
      Any donations to badcaps are welcome, click this link to donate . Thanks to all the supporters
      ​https://www.badcaps.net/donate

        Comment

        • lekvilius
          New Member
          • Jul 2018
          • 3
          • UK
          #3
          Re: HP 640 G4 BIOS Security Device Problem

          I tried few versions of NBDmiFit, i can boot to it, but can't unlock to MPM mode to change serial and etc. Any other way to change serial and UID please? Or how to unlock it to MPM mode?

            Comment

            • hoaca388
              Badcaps
              • Jan 2022
              • 12441
              • Socialist Republic of Vietnam
              #4
              Re: HP 640 G4 BIOS Security Device Problem

              Originally posted by lekvilius
              I tried few versions of NBDmiFit, i can boot to it, but can't unlock to MPM mode to change serial and etc. Any other way to change serial and UID please? Or how to unlock it to MPM mode?
              Have you tried it yet?
              Attached Files

              if you find these attachements useful please consider making a small donation to the site

              ↵
              Any donations to badcaps are welcome, click this link to donate . Thanks to all the supporters
              ​https://www.badcaps.net/donate

                Comment

                • 2667388155388299
                  Andy DE-BW
                  • Jan 2024
                  • 1
                  • Germany
                  #5
                  hi, i had 2 Posts here and actually they habe been deleted. Why?

                    Comment

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