To understand the need for a downgrade, one must analyze HP’s Dynamic Security feature. Early firmware versions (e.g., FDP1-1718A and earlier) allowed the printer to function with any cartridge containing a working microchip. However, around 2018, HP pushed firmware updates (notably versions ending in 1738A, 1830A, and later) that enabled a cartridge authentication protocol. Under this protocol, the printer would reject any non-HP chip, displaying the infamous error: “Cartridge Problem – One or more cartridges appear to be damaged. Remove them and replace with new cartridges.”
For a printer like the OfficeJet Pro 8620, which uses four separate ink cartridges (black, cyan, magenta, yellow), this change was economically devastating. An official HP 950/951 set costs upwards of $120, whereas compatible cartridges cost $20–$30. By forcing the use of first-party supplies, HP effectively transformed a functional $200 printer into a high-maintenance subscription device. Users who had relied on refillable cartridges for years suddenly found their printers bricked by an overnight update.
Connect the Printer:
Update Firmware:
Alternatively (for network or USB connections): hp officejet pro 8620 firmware downgrade better
Wait for the Process to Complete:
Verify Downgrade:
To keep your downgraded printer running for years: