I had to replace an ink cartridge that had run out of ink. The new cartridge worked for a few days, and then the printer refused to print. I received an error message that the printer could not recognize the new cartridge. I reseated the cartridge, restarted the printer, restarted the computer, all to no avail. When I inserted the empty cartridge, the printer recognized it, leading me to believe that the new cartridge was defective.
I phoned Epson tech support and got to a real person very quickly. She agreed with my diagnosis and sent a replacement cartridge. Voila! All is well.
I am very impressed with Epson's support and will remain a loyal Epson customer.
