If you have already performed a firmware update then you may need to perform a firmware downgrade so that your compatible / refillable cartridges are accepted again by your printer. Please see the following suggestions as to how to perform this (At your own risk! We take no responsibility for results!).
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XP-100/102
Turn off the printer.
Press and hold STOP+COLOR+ON buttons at the same time within one minute after printer is turned off.
Hold this buttons until ink LED is on.
Update devices list and select firmware then click update.
When update is completed all LEDs will blink.
Press STOP button to turn off the printer.
STOP - red triangle in the circle.
COLOR - color copy button with two blue sheets of paper.
REFILLABLE CARTRIDGES T1811-T1814 XP 30 102 202 212 215 305 315 - £11.95 1 Set of 4 Empty Compatible Refillable Ink Cartridges for use with Epson Expression Home XP 30, 102, 202, 205, 212, 215, 302, 305, 312, 315, 402, 405, 405 WH, 412, 415 printers. T1811 / T1812 / T1813 / T1814 (T1801/T1802/T1803/T1804/T1806) empty compatible cartridges with auto reset chips fitted.
XP-200//202//205//212//215/222/312
Turn off the printer.
Press and hold STOP+COLOR+Wi-Fi+ON buttons at the same time within one minute after printer is turned off.
Hold this buttons until all LEDs except power LED is ON.
Update devices list and select firmware then click update.
When update is completed all LEDs will blink.
Press STOP button to turn off the printer.
STOP - red triangle in the circle.
COLOR - color copy button with two blue sheets of paper.
XP-300/302/305/310/312/315/400/410/412/415/510/600/605/610/615
Turn off the printer.
Press and hold STOP+LEFT ARROW+HOME+ON buttons at the same time within one minute after printer is turned off.
Printer LCD will display "FW Update Mode".
Update devices list and select firmware then click update.
When update is completed confirm that "FINISHED" text and firmware information is displayed on the screen.
Press OK button to turn off the printer.
STOP - red triangle in the circle.
LEFT ARROW - white arrow on the left side of the OK button.
HOME - buton on the left size of the LCD.
XP-700//710/750/800/810/850
Turn off the printer.
Press and hold DOWN ARROW+ON buttons at the same time within one minute after printer is turned off.
Release buttons when HOME button is ON.
Printer LCD will display "Program Update Mode".
Update devices list and select firmware then click update.
When update is completed (approximately 5 ~ 10 min.) confirm that firmware information is displayed on the screen.
Press on the center of the touch screen to turn off the printer.
5 Epson Expression Home XP520 XP620 26 XL Refillable Cartridges - £19.96SET OF 5 NON OEM REFILLABLE EMPTY CARTRIDGES WITH AUTO RESET CHIPSFOR USE WITH EPSON EXPRESSION HOME XP510 XP520 XP600 XP605 XP610 XP615 XP620 XP700 XP710 XP715 XP800 PRINTERS.Latest auto reset chips fitted.Easy to refill again and again while in the printer!1 X T2621 LARGER BLACK COMPATIBLE INK CARTRIDGE1 X T2631 BLACK COMPATIBLE INK CARTRIDGE1 X T2632 CYAN COMPATIBLE INK CARTRIDGE1 X T2633 MAGENTA COMPATIBLE INK CARTRIDGE1 X T2634 YELLOW COMPATIBLE INK CARTRIDGE