: A Windows PC, an Ethernet cable (preferred for stability), and a specific older firmware version (e.g., version FDP1CN1416AR). LPR protocol
For users currently struggling with this issue on an 8620, here is the technical breakdown of the situation:
HP has declared the 8620 "end of life" (EOL). This means no new features, but they are still aggressively pushing security updates to kill third-party ink. The firmware downgrade "hot" topic will eventually cool down because HP will stop signing old firmware entirely.