asked Mar 9, 2011 at 2:32pm
Hp HP Photosmart C6180

HP C6180 w/ Continuous Ink System-yellow issue

I've been using a continuous ink system (CIS) for about a year and a half and it's worked really well. Suddenly the yellow won't print. The self diagnostic page prints all colors but no yellow. The ink is clearly flowing through the tube. I ordered a new yellow cartridge for the system, which didn't help. I cleaned the head. Still nothing. I unplugged and replugged.
Could the problem be mechanical--with the machine as opposed to the ink system itself? Thanks for any help you can offer!