Disconnect any other USB devices from your computer to avoid confusion. Turn on your HP OfficeJet Pro 8620. Plug the USB cable into the printer and your computer.
Locate the older firmware executable ( .exe for Windows or .dmg for Mac). The desired version is typically the "Non-Dynamic Security" version released around 2016–2017 (often version FDP1HA1416AR or similar).
What (Windows 11, Mac, etc.) are you using to perform this downgrade?
: Ensure that Allow Updates is temporarily set to Yes so the printer accepts the incoming file. hp officejet pro 8620 firmware downgrade
: On the printer's control panel, navigate to the Manage Updates menu. Touch Allow Downgrade and select Yes .
Navigate to the firmware update section within this boot menu to force accept the USB payload. If you want to ensure a smooth setup, tell me:
Always scan downloaded files for viruses before proceeding. Disconnect any other USB devices from your computer
When prompted with a confirmation asking if you want to turn off automatic updates, select or Disable . Method B: Disable via the Embedded Web Server (EWS)
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HP frequently updates its firmware to include "Dynamic Security" measures. These updates block non-HP, remanufactured, or third-party ink cartridges. Downgrading to an older firmware version bypasses these restrictions, allowing you to use budget-friendly ink options again. 2. Fix Connectivity and Software Bugs Locate the older firmware executable (
HP does not provide older firmware versions on their official HP Support website . You will need to find a trusted third-party site or use a saved backup from a previous installation.
Managing firmware outside of official manufacturer channels involves significant technical risks.