If your HP ZBook 15 G5 is still locked after all attempts, you have one nuclear option: replace the motherboard.
However, a creative workaround exists: Swap the EC/KBC chip.
On the G5, the password is stored inside the Nuvoton NPCE388N embedded controller, not the main SPI BIOS chip. You can: hp zbook 15 g5 bios password reset
This requires advanced rework skills (hot air station, stencil, leaded solder). Many repair shops will do this for $150–$250, far cheaper than a $900 motherboard replacement.
The ZBook 15 G5 stores the password in non-volatile memory. It does not rely on battery power to remember the password. Therefore, standard "CMOS resets" fail. If your HP ZBook 15 G5 is still
Before attempting a reset, you must identify which password is blocking you. The HP ZBook 15 G5 uses three distinct BIOS-related passwords:
The keyword "reset" typically targets the Administrator Password. The ZBook G5 stores this in a dedicated security chip (usually the EC/KBC or a separate Nuvoton chip), not a battery-backed CMOS. Removing the CMOS battery will NOT work on this model. This requires advanced rework skills (hot air station,
If this is a company-issued or stolen laptop, bypassing BIOS security is:
Subject: BIOS Password Removal/Reset Options for HP ZBook 15 G5 Date: October 26, 2023 Status: Informational / Technical Guide