Ensure no print jobs are stuck in the Windows or Mac print queue. Step 3: Put the Printer into Service Mode (If Required)
: You need the specific .exe (Windows) or .dmg (Mac) firmware file for the HP OfficeJet Pro 8620 (usually version FDP1HA1416AR or older, dating around 2014–2016).
Wipe the electronic gold contacts on the third-party cartridges with a lint-free cloth and rubbing alcohol. hp officejet pro 8620 firmware downgrade new
Some users report success using a USB flash drive with the firmware file.
Scan the downloaded file with antivirus software before opening it. Step 3: Put the Printer into Service Mode (If Needed) Ensure no print jobs are stuck in the
HP's official stance on firmware downgrade is clear: . In numerous HP Community threads, HP employees state directly that "downgrading the firmware on the HP OfficeJet Pro 8620 is not possible". One HP support representative wrote: "After reviewing your case, I regret to inform you that downgrading the firmware on the HP OfficeJet Pro 8620 is not possible".
: Resolves "Ink System Failure" errors or other bugs introduced by newer, problematic firmware updates. Control over Updates : Changing the update setting to Some users report success using a USB flash
ensures you only update when you choose, protecting your preferred printer state. Popular Downgrade Methods Update the firmware on an HP printer | HP® Support
: Ensure your computer and printer are connected to a stable power source. Step-by-Step Guide to Downgrade HP 8620 Firmware
HP does not host old firmware on their official support site; they only provide the newest versions. You will need to find a third-party source for older firmware (e.g., version FDP1CN1416AR or similar). Common sources include third-party ink retailers like or community forums like Step 3: Perform the Downgrade (Windows) Connect your printer directly to your computer via Run the downloaded firmware Select your HP OfficeJet Pro 8620 from the list of detected printers.
: Connect your printer to your PC via USB. Run the downloaded firmware utility on your computer. If the utility finds the printer, it may allow you to "Update" even if the version is older.