Please use the following steps:
1.Turn on the printer
If a cartridge is low or expended, you see a message on the Epson Stylus NX400 Series LCD display screen.
If you’re replacing a cartridge before you see a message on the Epson Stylus NX400 Series LCD display screen, press Setup
, select Maintenance
, and press OK
Then select Change Ink Cartridge
and press OK
2. Open the scanner.
3 Open the cartridge cover.
4. Squeeze the tab on the cartridge and lift the cartridge straight up to remove it.
5 Before opening the new cartridge package, shake it four or five times. (Do not shake a cartridge after opening the package; ink may leak.)
6 Remove the cartridge from the package, but be careful not to touch the green chip on the cartridge.
7 Remove the yellow tape from the bottom of the cartridge.
8 Insert the new cartridge into the holder and push it down until it clicks into place.
9 Once you replace all the necessary cartridges, close the cartridge cover and push it down until it clicks into place.
10 Lower the scanner.
11 Press OK
to begin charging the ink. This takes about 2 minutes. When you see a completion message on the LCD display screen, ink charging is finished.
I hope this will help.