Navigate to and ensure "Firmware Update" is enabled.
While holding the button, press the Back (curved arrow) button 4 times. The printer should boot into a "Support Menu."
Before attempting a downgrade, ensure you have the following ready: hp officejet pro 8620 firmware downgrade new
This guide provides the most current methods to downgrade your HP Officejet Pro 8620 firmware to restore compatibility with third-party ink. Why Downgrade Your HP 8620 Firmware?
Use remanufactured or compatible cartridges at a fraction of the cost. Navigate to and ensure "Firmware Update" is enabled
Most downgrade tools are executable (.exe) or disk image (.dmg) files. Step-by-Step Downgrade Process 1. Disable Automatic Updates
Take back control over what supplies you put in your hardware. Prerequisites Before You Begin Why Downgrade Your HP 8620 Firmware
HP regularly pushes firmware updates to "improve performance," but these updates often include code designed to recognize and block non-HP chips. By downgrading to an older version (typically versions from 2014 or 2015), you bypass these restrictions.