After printing a grey tone image on museum board, my 7800 failed to produce decent nozzle checks. After several power cleanings and wasted ink, I decided to replace my 3-year-old made in China pump/capping station along with new dampers. Also pulled the head, letting it soak in PiezoFlush while sucking and push some through it. Primed the dampers and put it all back together. After a couple of CL2 cleanings, it would only print yellow. Tried a full initialization, same result but it went through all the ink. The flushing box shows mostly yellow but the capping station is black/blue/yellow mixed with no red. The wiper has a thin layer of black
It’s probably time to replace this old friend. You guys have any ideas?