Downgrading the HP OfficeJet Pro 8620 firmware is a common but complex task often used to bypass "Dynamic Security" updates that block non-HP ink cartridges. While HP generally discourages it, users have successfully rolled back to earlier versions like FDP1CN1416AR to restore third-party cartridge compatibility. HP Support Community Firmware Downgrade Methods

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.

6. Conclusion

The practice of downgrading the HP OfficeJet Pro 8620 firmware represents a classic conflict between consumer rights (Right to Repair) and manufacturer intellectual property protection. While the downgrade process is technically feasible using signed legacy firmware binaries, it is a precarious solution.

Always scan downloaded files for viruses before proceeding.

Step 6: Verify the Downgrade

  1. After the printer restarts, go to Setup > Reports > Print Configuration Page.
  2. Look for "Firmware Datecode" or "Firmware Version."
  3. It should now read FDP1CN2033AR (or earlier).
  4. Insert your third-party or refilled cartridges – the "Cartridge Problem" error should disappear.

For users of the HP OfficeJet Pro 8620 , firmware downgrades are most often sought to bypass "Dynamic Security" features that block the use of third-party or non-HP ink cartridges. While HP generally does not officially support rolling back firmware, several methods and workarounds exist for technical users. Critical Preparation

  1. Voided Warranty – If your printer is still under warranty (unlikely for an 8620, but possible), downgrading will void it.
  2. Bricking the Printer – If the power fails or the USB cable disconnects during the downgrade, your 8620 can become a paperweight.
  3. HP Automatic Updates – Even after a successful downgrade, HP may force an auto-update the next time you connect to the internet. You must disable automatic updates immediately.
  4. Loss of Features – Very old firmware may lack bug fixes for network protocols (WPA3, etc.).

Remove Features: Sometimes limits certain scanning or networking capabilities.