Install the newest old firmware you can find (e.g., 1739A instead of 1709A). Some versions allow a single-step back.
: High, provided you have the correct version of the older firmware file (e.g., version FDP1CN1416AR is a common stable target). Step-by-Step Downgrade Guide hp officejet pro 8620 firmware downgrade new
Yes, but with significant caveats.
: You must find a specific older version (e.g., version 1400 series or earlier) from a trusted third-party archive or community forum, as the Official HP Support Site typically only provides the most recent version. Install the newest old firmware you can find (e
The HP OfficeJet Pro 8620 originally shipped firmware versions prior to that allowed any ink cartridge. Over time, HP introduced “Dynamic Security” – a feature that remotely blocks cartridges using a non-HP chip. hp officejet pro 8620 firmware downgrade new