When Epson DX4450 printer equipped with a CISS (Continuous Ink Supply System) sends a notice that there is no more ink:
- Lift printer cover to expose ink cartridges.
- Press Stop button on left of printer (second from top). Cartridges move to middle.
- Press stop button again (and again if needed), until cartridges slide to right, where the big hole allows you to see the cartridges. The switch (tiny squarish white button above the cartridges) will be seen. Press this button 5 seconds.
- Press the Stop button again to return/hide the Cartridges to extreme right.
- Enjoy printing!