How to fix"Unknown cartridge message" on Epson printers

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How to fix"Unknown cartridge message" on Epson printers
Solution 1:

• Remove all the cartridges.
• Close the door.
• Power off the printer.
• Disconnect the power.
• Disconnect the USB cable.
• Wait a minut.
• Connect the power cable
• Switch on the printer.
• Install the cartridges
• Close the door
• Power off.
• Power on.
• Connect the USB cable

Solution 2:

• Vérifiy the chips of the cartridges: if necessary, clean the chips with a soft cloth.

Solution 3:

• A cartridge is defective. Replace it.