HP ProBook 6550b BIOS password reset

Discussion in 'BIOS Mods' started by baribal, Sep 2, 2011.

  1. baribal

    baribal MDL Novice

    Oct 8, 2008
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    Do you know guys is there any possibility to brute force or reset password on modern HP notebooks? I have found one hp-bios-password-cracker. But I have googled recently and have found that it can be possible to get BIOS password hash, while pushing F2 with F12 buttons before entering the wrong password for the last 3rd attempt. Then we can use brute force to find the right hash and password itself. However I have been pushing F2, F12 and F2+F12, before and after entering password - no luck. Just getting "bios locked" message and no hash is shown at all and I have to poweroff the notebook. I guess CMOS clearing will not help as bios password in modern books is storing in some else chip (TPM)?? Could someone enlighten me in this question? Thanks in advance.
     
  2. Deb_Rider

    Deb_Rider MDL Senior Member

    Aug 21, 2010
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    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  3. Dre009

    Dre009 MDL Addicted

    Oct 26, 2009
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    @baribal
    HP/Compaq laptops only show the hash if the F2 or F12 key has been pressed prior to entering an invalid password for the last time.
     
  4. baribal

    baribal MDL Novice

    Oct 8, 2008
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    Nope. I have been pushing F2 and F12 (but not together) prior to the last 4th attempt - nothing happened. After 3rd attempt I am getting on-screen keyboard with mouse pointer and I can enter password by mouse and on-screen keyboard or by physical keyboard for the 4th time, after that I am getting computer locked message and no hash seen. :( I guess HP have changed the behavior to see the hash in recent notebooks. If it is possible at all.
     
  5. mikko

    mikko MDL Novice

    Mar 29, 2014
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    i dont know
     
  6. Dre009

    Dre009 MDL Addicted

    Oct 26, 2009
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    This is a very old thread to be replying to with no new information.

    new info
    I suggest the user to press f10 on start up to try and access the bios, this will prompt for password for bios access if one is set.
    and after the third attempt, the has with appear forcing you to restart the pc.
    (The previous procedure was asking for an user log in to access other menu such as boot option etc and not the standard BIOS account.)

    you can always head over this thread .
    http://forums.mydigitallife.net/threads/49497-HP-Probook-Elitebook-BIOS-Password-Reset-Utility