Understanding the Problem: Why Do Firmware Updates Break Third-Party Ink?
Modern inkjet printers are essentially small computers. When an over-the-air (OTA) or USB-connected firmware update is installed on your HP OfficeJet Pro 8620, it updates the printer’s security certificate database.
The HP OfficeJet Pro 8620 is a workhorse printer, known for its reliability and efficiency in small office environments. However, HP’s continued enforcement of its Dynamic Security system often blocks cheaper, third-party, or refilled ink cartridges through automatic firmware updates.
What is your computer running? (Windows 10/11, macOS, etc.)
: Navigate to the printer's setup menu and turn off automatic firmware updates to prevent the printer from re-installing the restrictive software. Connection : Most reliable downgrades require a direct USB connection between your computer and the printer. How to Downgrade HP OfficeJet Pro 8620 Firmware hp officejet pro 8620 firmware downgrade new
If you approach HP Support for a solution, the response is almost universally negative. A review of a support request from May 2025 shows an HP Agent bluntly stating, "After reviewing your case, I regret to inform you that downgrading the firmware on the HP OfficeJet Pro 8620 is not possible". Typically, the only advice from the manufacturer is to purchase genuine HP cartridges or to reset the printer, which does not roll back the firmware.
Interestingly, some users have reported success using HP's own professional-grade device management software, HP Web Jetadmin. This tool is designed for IT administrators to manage multiple printers but can be used to downgrade firmware on a single device.
ensures you only update when you choose, protecting your preferred printer state. Popular Downgrade Methods Update the firmware on an HP printer | HP® Support
Elias stared. He had been using the same third-party ink brand for years. It was affordable, high-yield, and worked perfectly. He knew, with a sinking feeling in his gut, exactly what had happened. The "Enhanced Security" update was actually a digital gatekeeper—a "dynamic security" feature designed to brick any ink cartridge that didn't have an HP-branded microchip. Understanding the Problem: Why Do Firmware Updates Break
Elias popped the latch. The carriage slid to the center. He ripped out the offending third
Turn off the printer, remove the cartridges, wait 5 minutes, turn it back on, and reinstall the cartridges.
Check for a menu option that says and ensure it is set to Yes . Step 3: Run the Firmware Downgrade Tool
: If the printer loses power or the connection is interrupted during the flash process, the printer motherboard can be permanently ruined (bricked). The HP OfficeJet Pro 8620 is a workhorse
: The printer will reboot once finished. If prompted about "non-genuine" cartridges, select OK or Continue to bypass the warning. Alternative: Factory Reset
Before attempting to send a file, you must ensure the printer will accept it: On the printer control panel, go to Printer Maintenance Update Printer Manage Updates Allow Downgrade Allow Updates is also set to (temporarily). HP Support Community Step 2: Locate Older Firmware Files
HP OfficeJet 8620 previous firmware update... - HP Community
If you do not turn off automatic updates, your printer will simply download the restrictive firmware again within a few days.