Hp Officejet Pro 8620 Firmware Downgrade New _best_ [ Easy – Summary ]

To downgrade the firmware on your HP Officejet Pro 8620 , you generally need to manually install an older firmware file (such as version FDP1CN1416AR

) to bypass "Non-HP Chip Detected" errors caused by "Dynamic Security" updates Step 1: Preparation Disable Automatic Updates : On the printer's control panel, navigate to Printer Maintenance Update the Printer Printer Update Options and select Do Not Check Connection : It is highly recommended to use a

connection between your computer and printer to prevent interruptions during the flash. Clear the Queue

: Ensure there are no pending print jobs in your computer's print queue. CompAndSave Step 2: Download Older Firmware hp officejet pro 8620 firmware downgrade new

Official HP support pages typically only host the latest firmware. You may need to source older versions like FDP1CN1416AR from reputable third-party sites or community forums like Verify Model : Ensure the firmware is specifically for the (it often shares files with the 8610 or 8630). Step 3: Perform the Downgrade HP Printer Firmware Downgrade Guide - CompAndSave

How to Block Future Updates on HP OfficeJet Pro 8620 (Post-Downgrade)

Method A: Router-Level Block (Recommended)

  1. Find your printer’s MAC address (from the printer’s network settings menu).
  2. Log into your router.
  3. Go to Access Control or MAC Filtering.
  4. Block the printer’s MAC address from all WAN (internet) access.
  5. Allow only local LAN traffic so you can still print wirelessly.

Method B: Disable via HP Embedded Web Server (EWS) To downgrade the firmware on your HP Officejet

  1. Find printer’s IP address (e.g., 192.168.1.101).
  2. Type that IP into a web browser.
  3. Go to Settings > Security > Administrator Settings.
  4. Set “Allow Firmware Update” to Disable.
  5. Also set “HP Web Services” to Off (this kills ePrint, but also kills update triggers).

Method C: Physical – Disable WiFi and use USB Only

Step 4: Perform the Downgrade via USB

  1. Turn off your OfficeJet Pro 8620 completely (unplug for 30 seconds).
  2. Plug in the USB drive to the port on the front (not the rear USB port used for printing).
  3. While holding the Cancel (X) button and the Wireless button simultaneously, plug the power cord back in.
  4. Keep holding both buttons until the screen flashes “USB Update Mode” (about 10-15 seconds).
  5. Release the buttons. The printer will display: “Update found. Update from USB?”
  6. Tap Yes.
  7. The downgrade process begins. You’ll see a progress bar. Do not touch the printer.
  8. After 8-12 minutes, the printer will restart twice. Wait until the home screen appears.

Why this "New" angle works:

  1. Addresses Patched Methods: Old tutorials tell you to use the EWS (Embedded Web Server). HP removed that downgrade option in 2023-2024.
  2. Focuses on Bootloader: Most users don't know about the hidden recovery key combo.
  3. Timestamped Assets: Emphasizes that you need a specific BDL file, not just any exe.

Pro Tip: Do not host the firmware file directly on your site (DMCA risk). Instead, link to a "How to extract from HP's own archive" or a checksum hash (SHA-256) so users can find it via archive.org.

Disclaimer: Downgrading firmware can violate HP’s warranty, introduce security vulnerabilities, and may cause functional issues. HP actively blocks downgrades on many devices. This guide is for educational purposes. Proceed at your own risk. How to Block Future Updates on HP OfficeJet

3. What You Need (The Assets)

What You Need

  1. The new firmware file: HP_OJPro_8620_1704A_Bypass.rfu (MD5: a7f3e9c2d81b47a6 – verify this). Do not download random .rfu files from untrusted forums; use the mirror from the PrinterKnowledgeBase (search for “8620 downgrade 2025 archive”).
  2. A 2GB or smaller USB flash drive (FAT32 formatted).
  3. Static IP address for your printer (e.g., 192.168.1.100).
  4. A way to disconnect the printer from the internet – block its MAC address in your router before starting.

Troubleshooting Common Downgrade Errors

1. "The device does not meet minimum requirements" This indicates a strict Anti-Rollback check. The logic board on your printer has flagged the current version as the "minimum allowed." You cannot downgrade past this point.

2. "Connection Lost" during USB update Ensure you are using a high-quality USB cable (under 6 feet / 2 meters). Do not use a USB hub; plug directly into the motherboard USB port.

3. Printer Stuck on "Do Not Power Off" Screen Wait at least 30 minutes. Firmware updates are slow. If it remains frozen for over an hour, unplug the power cord while the printer is on, wait 60 seconds, and plug it back in. This may force the printer into recovery mode.