Many modern HP AIOs require a VND (Vendor) password or an SMC (System Management Command) file from HP support to "unlock" the DMI for editing.
One interface for legacy BIOS and modern UEFI. hp doctor dmi tool all in one work
A user reports that their HP desktop system has frozen and will not respond to keyboard or mouse input. The IT technician uses the Doctor DMI Tool to scan the system and identify potential issues. The tool detects a problem with the system board and provides a detailed error report. The technician uses the tool to repair the issue and update the BIOS to the latest version. Many modern HP AIOs require a VND (Vendor)