When I replaced the cyan cartridge in my C84, it ceased to print that color. I assumed that I had a defective cartridge so I bought another one. I installed it, and cyan still would not print. However, it did allow black and the other colors to print so the fact that it was a full cartridge registered somewhere. Today I ran out of black so replaced that cartridge, and guess what. Now I can't print with black. I have run the cleaning operation multiple times and still nothing works. I am using the official Epson cartridges and installed them according to the directions. Any one ever have the same problem? Is there anything to do short of replacing the printer?