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Hp Officejet Pro 8620 Firmware Downgrade Jun 2026
Several error messages may appear during or after a downgrade attempt.
Since HP does not officially provide old firmware, users often find older .exe or .rfu packages on reputable third-party sites or community forums .
Note: Many users find that simply running the older installer while the printer is in normal mode works fine, so try Step 4 first. Step 4: Run the Firmware Downgrade Tool
Do not attempt a firmware downgrade over Wi-Fi. Wireless drops can corrupt the firmware file. Use a high-quality USB cable directly connected to your computer. hp officejet pro 8620 firmware downgrade
After it restarts, check the Printer Status Report to confirm the version has changed. Alternative Method: USB Drive (Flash Drive) If the .exe file doesn't work: Obtain the .ful firmware file.
Ensure the basic HP OfficeJet Pro 8620 drivers are installed on your PC.
Before downgrading, you must prevent the printer from automatically reverting to a newer version after the downgrade is complete. Several error messages may appear during or after
Facing the high cost of original HP ink, the user begins a journey through support forums and tech guides. They discover that HP occasionally releases "optional" firmware updates to remove these security features for certain models, but finding the right one for an older 8620 can be difficult.
In 2016, HP released a firmware update for the OfficeJet 86xx series that specifically targeted and disabled many third-party cartridges. More recently, in early 2026, another update reportedly started affecting models including the OfficeJet Pro 7720—showing that HP continues to use this approach.
HP uses a system called in its firmware updates. While HP states this protects intellectual property and printer functionality, its primary effect is blocking ink cartridges that lack an original HP security chip. Benefits of Downgrading Step 4: Run the Firmware Downgrade Tool Do
Given the high risk and technical difficulty of a firmware downgrade, it's worth exploring other options first:
Downgrading the firmware on an HP OfficeJet Pro 8620 to bypass "cartridge error" messages requires finding an older firmware version (like FDP1CN1910AR or similar) and flashing it via USB, as HP officially discourages downgrades.