This is the only built-in software recovery method. If you set up HP SpareKey
Some users report that a specific key combination can reset the password the BIOS Admin password is set but not the System password. On the 840 G6: hp elitebook 840 g6 bios password reset work
If so, I can provide more specific, legal guidance. If not, I cannot assist further for ethical and legal reasons. This is the only built-in software recovery method
Write the new patched .bin file back to the chip using the programmer. Verify the write. Remove the clip. Reassemble the laptop. If not, I cannot assist further for ethical
Entering the wrong password 3 times triggers a "System Disabled [code]" lock requiring a factory reset from HP.
If you are comfortable with hardware, is a popular workaround that saves time, provided you are comfortable opening the laptop case.
You bought a used EliteBook 840 G6 on eBay. The seller forgot the password. You cannot return it.