HP has an internal tool called HP BCU Advanced and a hardware dongle called HP Recovery Key Dongle for authorized service partners. If you provide proof of purchase (original invoice), a service center will reset the BIOS password for a fee (typically $50–$100). They will not give you the utility; they do it in-house.
There are two types of passwords on this machine: hp elitebook 840 g6 bios password reset utility
If you're unable to find a software-based solution, contacting HP support directly might be the best option. HP can provide guidance specific to your model and situation. They might require proof of ownership and could have additional steps or recommendations for resetting the BIOS password. HP has an internal tool called HP BCU
Third-party repair shops use specialized tools like the Raspberry Pi Pico with pico-pwreset firmware or the Vertyanov JIG (costs ~$200). These function as a "reset utility" by intercepting the SMbus. You send them your laptop, and they run their proprietary utility on it. If you're unable to find a software-based solution,