I have a very strange problem with my Designjet 9000, as soon as I start printing all printheads start to drop nozzles and soon it starts to print blank as if there is ink starvation, I cancel printing and run IQ test (without cleaning) and it comes out perfect, I repeat the IQ test for 5 or 6...
Suddenly the Cyan printhead in my Design jet 9000 had large gaps of white area in the test print, I run 3 strong cleaning cycles, it started printing properly then it started to drop ink on the media.
Same ink, same media settings, wipers and capping station are both clean and working properly...