Hp Officejet Pro 8620 Firmware Downgrade Hot ((new)) May 2026

Downgrading HP OfficeJet Pro 8620 Firmware: A Step-by-Step Guide

Are you experiencing issues with your HP OfficeJet Pro 8620 printer after a recent firmware update? Perhaps you've encountered compatibility problems or prefer an earlier version of the firmware. Downgrading the firmware can be a bit tricky, but we're here to help. In this post, we'll walk you through the process of downgrading your HP OfficeJet Pro 8620 firmware.

Why Downgrade Firmware?

Some users may prefer to downgrade their printer's firmware due to various reasons, such as:

  • Compatibility issues with certain paper types or print jobs
  • Bugs or glitches introduced in the latest firmware version
  • Preference for an earlier firmware version's features or performance

Preparation is Key

Before attempting to downgrade your firmware, make sure to:

  1. Backup your printer settings: Take note of your current printer settings, such as network configurations and any custom settings.
  2. Check the firmware version: Verify the current firmware version installed on your printer.
  3. Download the desired firmware version: Obtain the firmware version you want to downgrade to from the HP website or other reliable sources.

Downgrade Process

To downgrade your HP OfficeJet Pro 8620 firmware: hp officejet pro 8620 firmware downgrade hot

  1. Access the printer's Embedded Web Server (EWS): Open a web browser and enter the printer's IP address (usually found in the printer's network settings or on the printer's control panel).
  2. Log in to the EWS: Enter the administrator credentials (default is usually "admin" for both username and password).
  3. Navigate to the Firmware Update section: Look for the firmware update or management section, usually found under "Settings" or "Maintenance."
  4. Select the firmware file: Choose the firmware file you downloaded earlier (make sure it's compatible with your printer model).
  5. Update the firmware: Follow the on-screen instructions to update the firmware. This process may take a few minutes.

Alternative Method: Using the HP Printer Update Utility

If you're unable to access the EWS or prefer a more straightforward method:

  1. Download and install the HP Printer Update Utility: Get the utility from the HP website.
  2. Launch the utility: Run the utility and select your printer model.
  3. Select the firmware version: Choose the desired firmware version to downgrade to.
  4. Update the firmware: Follow the utility's instructions to complete the firmware downgrade.

Caution and Disclaimer

Downgrading your firmware may potentially cause issues with your printer's functionality or performance. Proceed with caution and at your own risk. HP does not recommend downgrading firmware, and it may void your printer's warranty.

Conclusion

Downgrading your HP OfficeJet Pro 8620 firmware requires careful preparation and attention to detail. If you're unsure or uncomfortable with the process, it's recommended to seek assistance from HP support or a professional. Share your experiences or ask questions in the comments below!

HP OfficeJet Pro 8620 Firmware Downgrade: A Complete Guide If your HP OfficeJet Pro 8620 has recently stopped accepting third-party or refilled ink cartridges, you are likely a victim of "Dynamic Security." HP frequently releases firmware updates that block cartridges containing non-HP chips, leading to the "Non-HP Chip Detected" or "Cartridge Problem" error. Downgrading HP OfficeJet Pro 8620 Firmware: A Step-by-Step

Downgrading your firmware to an older version can bypass these restrictions and let you use more affordable compatible ink again. Why Downgrade Your HP 8620 Firmware?

The primary reason users look for a "hot" downgrade method is to restore functionality for third-party ink cartridges.

Cost Savings: Compatible cartridges from retailers like CompAndSave or LD Products are significantly cheaper than genuine HP 950/951XL sets.

Error Removal: Reverting to an older firmware version (like FDP1CN1416AR) often removes the software lock that triggers the "damaged cartridge" message.

Control: It prevents HP from automatically changing how your hardware interacts with your chosen supplies. Preparation: Essential Steps Before You Start

Downgrading carries risks, including potentially "bricking" your printer if interrupted.

Part 4: Bypassing "Newer Version Installed" Error

If you see this, HP has set an anti-rollback counter. Attempts to force downgrade include: Compatibility issues with certain paper types or print

Method 4: Serial Console / JTAG (Not for Beginners)

This requires opening the printer, soldering to UART pads on the mainboard, and manually rewriting the SPI flash. Not recommended unless you are an electronics engineer.

Final Verdict: Should You Downgrade?

  • ✅ Yes – if you rely on cheaper cartridges and don’t need HP’s latest cloud features.
  • ❌ No – if you are not tech-savvy or your printer is under active HP warranty.

Downgrading the HP OfficeJet Pro 8620 firmware is a common but unofficial workaround to bypass Dynamic Security

blocks that prevent the use of non-HP or refilled ink cartridges

. While HP officially states that downgrading is not possible for "security and quality reasons," several community-verified methods exist to revert to older, more compatible versions. HP Support Community Critical Pre-Downgrade Steps

Before attempting a downgrade, you must prepare the printer to accept older software and prevent it from immediately re-updating. Disable Automatic Updates : On the printer’s control panel, navigate to Settings > Printer Maintenance > Update Printer and set it to Allow Downgrades : If your current firmware allows it, find the Manage Updates menu, select Allow Downgrade , and choose Backup Current State

: Note your current firmware version (e.g., FDP1CN2022AR) by printing a Printer Status Report or checking the Support Menu HP Support Community Downgrade Methods Method 1: Manual Software Installation (Recommended)

This method involves running a previous firmware executable file (like version ) on a Windows PC. HP Support Community

Method 2: Windows Downgrade via USB Cable (Most Common Attempt)

  1. Disable printer from internet (unplug Ethernet, forget Wi-Fi, or block printer MAC in router).
  2. On PC, uninstall HP Smart / HP Print Assistant. Install HP LJ Universal Print Driver only (to avoid auto-update nagware).
  3. Run the old firmware .exe file as Administrator.
  4. When prompted, select USB connection (not network).
  5. Follow prompts. If error appears: "A newer version is already installed", proceed to Method 3.

Troubleshooting: Why Isn't It Working?

  • Error: "Invalid Signature" : You are using a newer firmware file. Ensure the .bdl is specifically 1742A or 1709A. HP cryptographically signs old files. If the signature is rejected, your printer’s bootloader has already been updated permanently. Unfortunately, some late-2023 units are "hard-locked."
  • USB Drive not recognized: Try a smaller drive. 16GB FAT32 non-branded USB 2.0 drives work best. Avoid SanDisk Extreme or USB 3.2 large drives.
  • Printer boot loops: Manually pull the power cord for 60 seconds. Reboot normally. If it auto-updates, you were too slow on Step 5.

Known "Good" Versions (if available):

  • FDP1CN1426AR – Before major cartridge lockdown (approx 2015)
  • FDP1CN1529AR – Last version widely reported to accept third-party ink without nag screens.