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HP Z640 Bios Password Reset Not Working

HP Recommended
HP Z640
Microsoft Windows 10 (64-bit)

I have a Z640 in which I have an unknown BIOS PW. I followed the instructions in the manual to attempt to remove the BIOS PW using the jumper labeled E49 on the board. I powered off the machine, removed plug and components. Held power button to drain any leftover power. Removed green jumper at E49 which was covering the first 2 pins out of four. I then reconnected asset and powered up until I see the HP Logo. I power down remove plug and reinsert he jumper in the same position I took it out. Reconnect power and go straight to bios using F10 but the password still exists. I also tried the same process but waited until I got to the windows login screen before powering down and reinserting the jumper with no success. Am I missing something here? I will try to remove the cmos battery but the HP instructions didn't say anything about that. Has anyone else had this issue or have any suggestions I can try?   THANKS!!!

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HP Recommended

Thank you for visiting the HP Support Community.


According to the Community's Rules of Participation:


4d. No posts shall include instructions or directions intended to bypass or subvert security measures, including passwords, locking mechanisms, fingerprint scans, etc., or to bypass any safety measures.


Therefore, this topic is being locked. If you would like help resetting the password on your product, please Contact HP support in your region. 



I work on behalf of HP.
HP Support Community Moderator
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