Hp Officejet Pro 8620 Firmware - Downgrade Hot

Downgrading firmware on the HP OfficeJet Pro 8620 is a common task for users wanting to bypass "dynamic security" measures that block non-HP or third-party ink cartridges. While HP officially states that downgrading is not possible or supported, several community-driven workarounds exist. HP Support Community Method 1: Direct Reset to Factory Defaults

In some cases, restoring the printer to its original state can bypass recent firmware-level restrictions. CompAndSave On the printer's control panel, select Navigate to Restore Factory Defaults

After the printer restarts, check if third-party cartridges are accepted. CompAndSave Method 2: Manual Downgrade via RFU File (Technical)

This method involves sending an older firmware file (often with a extension) directly to the printer using a computer. Requirements

: A Windows PC, an Ethernet cable (preferred for stability), and a specific older firmware version (e.g., version FDP1CN1416AR). LPR protocol

or a firmware update tool to "push" the older file to the printer's IP address.

: Finding reliable archived firmware files usually requires searching third-party forums or sites like or specialized driver archives. Method 3: Hidden Support Menu Reset

To access more advanced recovery options that might allow a firmware overwrite: button (the curved arrow) on the control panel four times Support Menu should appear. Look for the Reset Menu and choose Semi-Full Reset . This is more comprehensive than a standard factory reset. Important: Prevent Future Updates

Once you have successfully downgraded or if your printer currently works with third-party ink, you must disable automatic updates to prevent the printer from locking again. HP Support Community

The small-town library was a sanctuary of silence until the "Order of the Ink" began their clandestine operation. At the center of the table sat the HP Officejet Pro 8620, a once-loyal workhorse now bricked by a mandatory firmware update that rejected every third-party cartridge in the building [1, 2].

"It’s a digital lockdown," whispered Elias, the head librarian. "HP pushed 'Dynamic Security.' If the chip isn't theirs, the printer won't dance." [2]

Sarah, a local coder with a penchant for digital restoration, pulled a weathered USB drive from her pocket. "The 2014 firmware—version PNP1NP1416AR—is the Holy Grail," she muttered, her fingers flying across her laptop. "It’s the only way to bypass the blockade." [1, 2] hp officejet pro 8620 firmware downgrade hot

The room grew hot, not from the radiator, but from the tension. They had to trick the printer into thinking it was traveling back in time. They initiated the firmware downgrade, a "hot" maneuver performed while the machine was still reeling from a hard reset [1].

As the progress bar crawled across the tiny touchscreen, the printer groaned. A "Non-HP Chip Detected" error flashed one last time, like a dying threat. Then, the screen flickered, the gears whirred, and a single page slid out, perfectly crisp and printed with "black market" ink.

"The 8620 is back," Sarah grinned. "And this time, it’s staying off the grid." [1, 2]

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

The HP OfficeJet Pro 8620

firmware downgrade is a high-interest topic primarily because recent firmware updates (like version FDP1CN2022AR Downgrading firmware on the HP OfficeJet Pro 8620

) often include "Dynamic Security" measures that block the use of third-party or non-genuine ink cartridges. Downgrade Guide & Best Practices

While HP officially discourages downgrading as it can "brick" the printer or remove security patches, users often follow these steps to restore third-party ink compatibility: Preparation:

USB Connection: Connect the printer directly to your PC via a USB cable. Network or Wi-Fi connections are less stable for firmware flashing.

Disable Updates: On the printer control panel, go to Settings > Printer Maintenance > Update Printer and set it to Manual or Off to prevent the printer from immediately re-updating. Locate Firmware: HP does not host older firmware on their official site.

Users typically find older files (like version 1416AR or 1910A) on community repositories or third-party ink vendor sites. Execute Downgrade : Download the older .exe firmware installer. Run the file and select your HP OfficeJet Pro 8620 from the dropdown menu.

If the installer shows a "Not Applicable" or "Up-to-Date" error, some users extract the .exe (using 7-Zip), open the EnterpriseDU.ini file, and change VerifyDownloadID from 1 to 0 to force the flash.

Confirm Version: Check the printer's Support Menu (accessed by tapping the "Back" button 4 times) to verify the firmware has reverted. Risks and Troubleshooting Update the firmware on an HP printer | HP® Support

Downgrading the firmware on an HP OfficeJet Pro 8620 is a popular "hot" topic because recent updates often include "Dynamic Security" measures that block the use of third-party, non-HP, or refilled ink cartridges. By rolling back to an older firmware version (such as version 1910A), users can often bypass these restrictions. Critical Preparation

Before attempting a downgrade, you must adjust the printer's internal settings to permit the change:

Allow Downgrade: On the printer control panel, navigate to Settings > Printer Maintenance > Update Printer > Manage Updates. Set Allow Downgrade to Yes.

Enable Updates: Temporarily set Allow Updates to Yes so the printer will accept the firmware file you are about to send. Troubleshooting: Why Isn't It Working

Connection: Use a direct USB cable connection between your computer and the printer. Avoid Wi-Fi during the firmware transfer to prevent data corruption. Downgrade Process (Windows)

Obtain Older Firmware: HP does not officially provide old firmware on their website. You must source the specific .exe or .ful file (e.g., version FDP1CN1416AR or 1910A) from reputable third-party archives or community forums like the HP Support Community.

Run the Installer: Double-click the downloaded firmware file on your PC.

Select Printer: Choose your HP OfficeJet Pro 8620 from the dropdown list in the updater tool.

Send Firmware: Click Update or Send Firmware. The printer display will show a progress bar or change color (e.g., to light green) during the 1–5 minute process.

Restart: The printer will automatically restart once the installation is complete. Alternative: Hidden Support Menu Reset

If you cannot find the firmware file, some users attempt a "Semi-Full Reset" to revert settings, though this does not always roll back the actual firmware version:

Important Warning: Firmware downgrading is an advanced procedure. HP actively blocks downgrades on many of their printers to prevent the use of non-HP cartridges. This guide covers the theory, risks, and methods—but success is not guaranteed on newer hardware revisions or printers that have already updated to the latest "Dynamic Security" firmware.

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.

Part 6: Step-by-Step Summary Checklist

Before starting:

[ ] Backup current firmware version number.
[ ] Download old firmware from community source.
[ ] Disable printer internet (WiFi/Ethernet).
[ ] Try USB downgrade with service menu first.
[ ] If blocked – accept that your printer may be permanently locked.
[ ] Consider third-party mainboard swap as last resort.

Method 3: Service Mode / Engineering Menu (Advanced)

HP printers have a hidden service menu that sometimes allows downgrade.

Enter Service Menu on HP 8620:

Turn off printer.
Press and hold: Cancel (X) + Home (house) + Color Copy simultaneously.
While holding, press Power once. Release all buttons when "Permanent Storage Init" or "Service Menu" appears.

Inside Service Menu:

Navigate to System Configuration → Firmware Rollback (if present – newer menus removed it).
Select "Allow Downgrade" or "Clear Anti-Rollback Flag".
Then flash via USB (Method 1).

Step 2: Prepare the Firmware File

Download the OJPro8620_1742A.exe file from a legacy driver repository.
Run the .exe file on your PC. This is a self-extracting archive. It will ask for a destination folder. Extract it to your Desktop.
Inside the extracted folder, look for a file named HP_OfficeJet_Pro_8620_1742A.bdl (usually around 80-90 MB).
Copy only the .bdl file to the root of your FAT32 USB drive. Do not put it in a folder.

✅ Method 3 – OTA proxy spoof

DNS redirect hpsf.hpcloud.hp.com → local server.
Serve older firmware with a modified version header matching current major.minor but older build.
Rarely works on 8620 after 2022 – HP added signature check on version block.

Part 1: Understanding the Risks & Why You Want to Downgrade