HP’s firmware from February 2025 implements a hardware fuse. Once blown, you cannot downgrade below version 2.1. Check your current version. If it’s 2.1.7 or higher, the new method above will still work because it exploits the bootloader, not the firmware. But if you see error code during downgrade, your printer is permanently locked.
Do not turn off the printer or disconnect the USB cable during the flashing process. This can permanently "brick" (damage) your printer.
Recent firmware updates (like version FDP1CN2022AR ) are specifically designed to enforce the "damaged or counterfeit cartridge" lockout. Downgrade Methods: Review & Risks hp officejet pro 8620 firmware downgrade new
: Connect your printer to your PC via USB. Run the downloaded firmware utility on your computer. If the utility finds the printer, it may allow you to "Update" even if the version is older.
For users of the , recent "Dynamic Security" firmware updates can often block the use of affordable, third-party or remanufactured ink cartridges, resulting in "Non-HP Chip Detected" or "Cartridge Problem" errors. Downgrading your firmware to an older version (like 1910A or FDP1CN1416AR) can restore compatibility. Understanding the "Dynamic Security" Issue HP’s firmware from February 2025 implements a hardware
How to Downgrade HP OfficeJet Pro 8620 Firmware: A Complete Guide
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? If it’s 2
On the printer screen, go to > Printer Maintenance > Update Printer . Select Manage Updates and set Allow Downgrade to Yes . Run the Older Firmware:
After downgrading, HP will try to your printer automatically. Here’s how to stop that permanently:
Connect your printer via for the most stable connection during the process.
: The printer may become permanently unusable if the process is interrupted.