You know - if You want to change (update/downgrade) firmware in Your printer - You can do it in 2 ways: - in regular mode (requires OEM ink cartridges installed and had be NO errors in printer) - in Program Update Mode ( can be performed without ink cartridges at all)   So here are 2 ways to put WF-2860, WF3720 Series printers in Program Update Mode:   1. Power OFF the printer. 2. Press touch screen Place A + Power button. 3. Hold them - 20 seconds!! until