Hp Officejet Pro 8620 Firmware Downgrade New Official

NEVER turn off the printer during the downgrade process. This can permanently damage the printer (brick it).

Have you successfully used this new downgrade method on your HP OfficeJet Pro 8620? Share your firmware version and experience in the comments (on our forum) – but be aware HP may be watching.

On the printer screen, go to Setup > Printer Maintenance > Update the Printer > Printer Update Options > Do Not Check .

On your PC, run the old .exe file as Administrator. Choose USB Connection .

Step-by-Step Guide: Downgrading HP OfficeJet Pro 8620 Firmware Step 1: Find and Download the Safe Firmware Version hp officejet pro 8620 firmware downgrade new

HP regularly pushes firmware updates to "improve performance," but these updates often include code designed to recognize and block non-HP chips. By downgrading to an older version (typically versions from 2014 or 2015), you bypass these restrictions.

Typical firmware version formats for the OfficeJet Pro 8620 include codes like FDP1CN2022AR , FDP1CN1914AR , or 1432AR .

: Open the modified tool, select your printer, and click Update . Method 2: USB Drive (Alternative) Format a USB drive to FAT32 . Save the older .ful firmware file to the root of the drive. Insert the drive into the printer's front USB port. If the printer asks "Upgrade detected?", select Yes . Method 3: Factory Restore (Limited Success) Go to Setup > Tools > Restore Factory Defaults .

: Double-click the downloaded firmware file on your computer. NEVER turn off the printer during the downgrade process

Connect the printer directly to your computer using a .

For the technically proficient, a more direct approach exists. A script known as was designed specifically for this series of printers. The script is designed to directly upload "timebomb-less" or older firmware to the printer via the network. However, note that the original maintainer noted that the script itself does not provide the firmware file. Users were expected to source the specific file needed (e.g., ojpro_8620_1416A_04152014_1.ful.rfu ) for the script to work.

To successfully downgrade, you must first prepare the printer to accept an older version of software. 1. Enable Downgrading on the Printer

He read a desperate tip from a user named InkRebel88 : “Take the cartridges out. It’ll go to a 'Missing Cartridge' screen. That’s okay. That screen allows the firmware flash. Do it while the bay is empty.” Share your firmware version and experience in the

: Click Update or Send Firmware . The process usually takes 2–5 minutes.

HP’s firmware from February 2025 implements a hardware fuse. Once blown, you cannot downgrade below version 2.1. Check your current version. If it’s 2.1.7 or higher, the new method above will still work because it exploits the bootloader, not the firmware. But if you see error code during downgrade, your printer is permanently locked.

While holding the button, press the Back (curved arrow) button 4 times. The printer should boot into a "Support Menu."