: HP business laptops generally do not have a universal factory default BIOS password, though some sources suggest trying "PASS123" for older EliteBook models. Advanced/Technical Alternatives
Contact HP Support and provide your serial number and proof of ownership. They will email a customized file. Save this file to the root of a FAT32-formatted USB drive. How To Reset Bios Password Hp Elitebook 840 G3
For business-class devices like the EliteBook, security is high-priority. Here are the primary official avenues: HP SpareKey (If Pre-Configured): Turn on the laptop and tap to enter the Startup Menu. to enter BIOS Setup. Enter an incorrect password three times to prompt the HP SpareKey Recovery option (F7). : HP business laptops generally do not have
Do not remove the CMOS battery before using this method; the SMC file is time-coded, and resetting the system clock via battery removal can cause the file to fail. 3. Attempt a CMOS Reset (Low Success Rate) Save this file to the root of a FAT32-formatted USB drive
Keep in mind that these codes may not work, and you may need to try other methods.
For persistent locks where software methods fail, some users resort to desoldering and reprogramming the BIOS IC chip using professional tools like the . This is a high-risk procedure that should only be performed by experienced technicians. Summary of What Generally Does NOT Work