While this won't wipe the password, it resets the RTC (Real Time Clock) and sometimes forces the BIOS to re-initialize, which can clear a "soft" lock.
BIOS can be a major hurdle, especially when you need to change boot orders or enable virtualization. Because this is a business-grade laptop, HP designed the security to be robust, meaning a simple CMOS battery pull often won't work. how to remove bios password hp elitebook 840 g1
to manually "flash" a clean BIOS file onto the chip. This requires disassembling the laptop and potentially using a clip or soldering to connect to the BIOS chip. Reset HP EliteBook 840 G1 BIOS Password - FAQ - JustAnswer While this won't wipe the password, it resets
For technicians with a CH341A USB programmer or similar. to manually "flash" a clean BIOS file onto the chip
For IT professionals or if software methods fail, the correct hardware method is to read and rewrite the EEPROM.
removing the CMOS battery—it won't work. Start with the master password websites, then move to hardware methods.