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Read the current BIOS dump using NeoProgrammer. Save a backup ( original.bin ).
As a last resort:
Note: Code generators exist but are unofficial; newer BIOS updates may block them. hp elitebook 850 g8 bios password reset upd
When you enter a wrong password three times, the system might display a code (often starting with 'i' or 'A'). How Do I Remove a BIOS or UEFI Password? Read the current BIOS dump using NeoProgrammer
There are two methods to reset the BIOS password on the HP EliteBook 850 G8: hp elitebook 850 g8 bios password reset upd
Try generating an SMC code via USB – many G8 users report success with properly generated .bin files from trusted laptop repair forums.