Hp: Officejet Pro 8620 Firmware Downgrade New

HP OfficeJet Pro 8620 Firmware Downgrade New: The Complete 2026 Guide to Reclaiming Your Printer

Q2: Can I downgrade using a Mac?

Historically, the USB method on Mac often fails due to hidden files on formatted drives. Use a Windows PC or a Linux live USB for reliability.

Part 7: Alternatives to Downgrading (If You Change Your Mind)

If the process seems too risky, consider these options instead of fighting HP’s firmware war:

  1. Use HP’s “Cartridge Protection Free” cartridges – HP now sells “non-security” cartridges for legacy models. They are 40% more expensive than third-party, but they work on any firmware.
  2. Convert to a CISS (Continuous Ink Supply System) – A CIS system often bypasses chip checks because it uses auto-reset chips that mimic HP’s latest signatures.
  3. Buy a different brand – Epson EcoTank or Brother INKvestment Tank printers do not use dynamic security. This is a permanent solution.
  4. Use the printer as a scanner only – You can still scan to PC via USB. Then buy a cheap monochrome laser printer for documents.

Trapped by the Update: A Deep Dive into the HP OfficeJet Pro 8620 Firmware Downgrade Nightmare

If you own an HP OfficeJet Pro 8620, you likely bought it for one reason: cheap, high-volume printing. For years, this workhorse was the king of the SOHO (Small Office/Home Office) market. But recently, a quiet war has been raging in printer forums. The battle cry? "How do I force a firmware downgrade on my 8620?" hp officejet pro 8620 firmware downgrade new

Let’s rip the bandage off. HP doesn't want you to downgrade. In fact, as of late 2024 and into 2025, they have made it incredibly difficult. But why is there such a high demand for "old" software? And is there a "new" trick to rolling it back?

Here is the current state of play for the HP OfficeJet Pro 8620. HP OfficeJet Pro 8620 Firmware Downgrade New: The

The "New" Method (That Actually Works... For Now)

So, is there a new way to downgrade in 2025? Yes, but it involves a time machine (sort of) and disabling your internet.

Here is the current community-sourced method for the OfficeJet Pro 8620: Use HP’s “Cartridge Protection Free” cartridges – HP

The Pre-Requisite: You need a firmware file pre-dating 2022 (specifically version 1743B or 1709A). These are hard to find, but they exist on third-party tech forums (proceed with virus scans!).

The Process:

  1. Factory Reset: Wipe the printer’s memory. This sometimes softens the version lock.
  2. Disable Auto-Update: Go into the EWS (Embedded Web Server—type your printer’s IP into a browser) and turn off "Allow Updates." Unplug the Ethernet. Turn off WiFi.
  3. USB Only: HP’s network update protocol is the strictest. You must use a USB cable.
  4. The "Rename" Trick: Some users have had success renaming the old .rfu file to match the current firmware number. (e.g., rename 1743.rfu to 2145.rfu). This tricks the printer's version check.
  5. Force Flash: Run the downgrade executable. The screen may flash red or error out. If it takes, you will see "Downgrade Successful."

Warning: If you get error code 0xc19a0025, your printer has blown an electronic fuse. That is the "suicide code" HP uses to brick printers that attempt unauthorized rollbacks.

9. Call to Action (Engagement)

"Did this work on your 8620? Tell me the last 4 digits of your old firmware in the comments. If you see 'Update blocked by admin,' you need to perform a factory reset before starting Step 3."

HP OfficeJet Pro 8620: A Practical Guide to Firmware Downgrade