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The x880 printers read both MK and PK chips as PK, though you should still be able to print. Some people transfer the Epson cartridge chips to the refill carts (secured with double sided tape) to avoid the “non-genuine” error. I have included information for using Epson chips on refill carts below.
Attach Epson chips to refill cartridges:
Before handling any chips (or really any electrical device for that matter), you should ground yourself and mindful of the clothing you wear, and if you’re working on carpet, etc… as static shock can destroy a chip.
Looking at the chip on the Epson cartridge, you will notice there are two small plastic points that hold the chip in place. Make a note as to which way the chip fits onto the cartridge so you can attach it to the refill cartridge in the same direction. Using a straight razor blade at an angle carefully cut the top of these two points off (be careful not to scratch the gold contacts), which will release the chip so you can carefully pry it off the cartridge using the edge of the blade. You can also use a sharp knife or something similar to pry the chip off the refill cartridge. You will notice the same two points on the refill cartridge where the chip goes (pry the chip off the refill cartridge before attaching the Epson chip in it’s place)- gently line up the Epson chip with these points and attach it to the refill cartridge by using single thickness (not foam or thick) double sided tape. Making sure your hands are clean and dry, press the chip to make sure it is tightly seated and flat/flush on the cartridge. Now, using the chip resetter- reset the chip and insert the cartridge into your printer. NOTE: Installing a cartridge without a chip, or with a crooked chip attached can damage the printer’s chip sensor- so always make sure cartridges have chips secured flat before installing cartridges
Please let me know so I can help you get past this and back to happily printing~ Dana