: Before attempting a downgrade, ensure the printer won't immediately re-update. On the printer control panel, go to Setup > Printer Maintenance > Update the Printer > Printer Update Options and select Do Not Check .
Once the downgrade is successful, immediately disable auto-updates to prevent the printer from re-installing the problematic firmware: HP Printer Firmware Downgrade Guide - CompAndSave
Before you begin the downgrade process, you need to ensure a stable, uninterrupted environment. Interrupting a firmware update—even a downgrade—can "brick" (permanently disable) your printer. hp officejet pro 8620 firmware downgrade new
The following methods have been reported to work for the HP OfficeJet Pro 8620.
: Use a USB cable for the most stable connection. : Before attempting a downgrade, ensure the printer
If USB method not available — using Embedded Web Server (EWS) / Network:
The printer screen may turn green or display a progress bar. Do not turn it off. It will print a status report once complete. 🔒 Disabling Future Updates If USB method not available — using Embedded
To downgrade your HP OfficeJet Pro 8620 firmware—often done to resolve "cartridge problem" or "non-HP chip detected" errors—you must first enable the printer to accept older versions and then manually send the firmware file from a computer.
into a browser to access the Embedded Web Server (EWS). Go to Printer Updates and disable them there.
: This guide is provided for informational purposes only. Firmware downgrade is an unsupported procedure that may void your warranty or damage your printer. The author assumes no responsibility for any issues arising from following these instructions. Always back up your data and proceed with caution.
A: The most commonly reported problematic version for the 8620 is FDP1CN2022AR . It has been known to block both OEM and non-OEM cartridges.