Downgrading HP OfficeJet Pro 8620 Firmware: A Complete Guide

hottest request

The right now is for LDP_1834A — works with most refilled cartridges.

Despite official restrictions, some users have reported success using advanced manual methods rather than the standard HP utility.

1. Disable printer from internet (unplug Ethernet, forget Wi-Fi, or block printer MAC in router).
2. On PC, uninstall HP Smart / HP Print Assistant. Install HP LJ Universal Print Driver only (to avoid auto-update nagware).
3. Run the old firmware .exe file as Administrator.
4. When prompted, select USB connection (not network).
5. Follow prompts. If error appears: "A newer version is already installed", proceed to Method 3.