[Solved] HP EliteBook 840 G1 BIOS Admin Password !!!?

Discussion in 'BIOS Mods' started by tomay3000, Jun 15, 2015.

  1. Asw

    Asw MDL Novice

    Nov 20, 2019
    17
    2
    0
    Can you help me how to reset hp 2570p BIOS password?
     
  2. vagabont

    vagabont MDL Novice

    Mar 20, 2019
    1
    1
    0
    hi, I've made a dump of passworded 840 g1 with ch341a and 2 bios chips, I've desoldered and read 25q128fvsq the file is 16mb and when tried to write after modification software says disagreement and computer won't start if i try to write original dump it is the same. the second chip is 25q16dvs. wich one has to read and how to read with ch341a with an option for main memory or main meomry+secured otp?
     
  3. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
    5,711
    1,596
    180
  4. XERANO

    XERANO MDL Novice

    Dec 7, 2008
    18
    1
    0
    LatinMcG only the 16MB Flash or both Chips of a Elitebook 840 G1?

    I need your Help too.

    Which Clip do you use to Connect the Chip?
     
  5. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
    5,711
    1,596
    180
    i dont use a clip.. as it cant read properly.
    16mb
     
  6. XERANO

    XERANO MDL Novice

    Dec 7, 2008
    18
    1
    0
    OK so you use a DIP Adapter ?
     
  7. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
    5,711
    1,596
    180
    i remove the chip and use adapter yes.
     
  8. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
    5,711
    1,596
    180
    to make it generic needs Intel ME Cleaned properly.
    first make backup.bin and verify it before erasing chip.
    what programmer will you use? if CH341A i recommend flashrom or ASprogrammer
    also does not always work with clip to board.. might need to desolder.
     
  9. hu840

    hu840 MDL Novice

    Apr 15, 2020
    1
    0
    0
    Hi LatinMcG

    Do you know how i can delete the admin password from the bios flash dump of an hp elitebook 840 g1?
    Is there a way to edit the flash dump at the correct address?
    Thanks
     
  10. LatinMcG

    LatinMcG Bios Borker

    Feb 27, 2011
    5,711
    1,596
    180
    with uefitool find UserCred and replace it with a clean one in hexedit
     
  11. icoso

    icoso MDL Novice

    Nov 18, 2021
    1
    0
    0
    I have an HP ELitebook 840 g2. Is there an SMC.bin file for this laptop that I can use? Or is there some other method that I can try to reset the bios?