I have a friend that has a HP 7210 that will not print color. She had the color turned off for a month because she was out of ink and recently got the cartridge refilled. The printer will not print anything in color, and that makes me think that it is some kind of setup problem. I went in and checked in preferences and everything looks right. When I took the cartridge out and wiped it with a wet cloth, there was streaks of ink on the towel. I have used refilled cartridges before that get clogged and cleaning with a cloth makes it better. Also, the ink levels show empty even though it has been recently refilled.