Professionals use tools like the to "read" the chip and a utility like RC Unlocker to patch out the password.
There are several methods to reset the BIOS password on an HP EliteBook 840 G6. Here are a few: hp elitebook 840 g6 bios password reset utility
to launch the SpareKey wizard and answer your recovery questions to gain access. BIOS Configuration Utility (BCU) Professionals use tools like the to "read" the
Use your programmer to write the cleaned .bin file back to the chip. Reassemble the laptop. The password should be gone. hp elitebook 840 g6 bios password reset utility
Write modified bin back. Power on – password should be gone.