Hp Officejet Pro 8620 Firmware Downgrade Hot Work · Real

If you cannot find the firmware file, some users attempt a "Semi-Full Reset" to revert settings, though this does not always roll back the actual firmware version:

While HP officially discourages downgrading as it can "brick" the printer or remove security patches, users often follow these steps to restore third-party ink compatibility: : hp officejet pro 8620 firmware downgrade hot