Hi there,
I'm sorry to hear you are experiencing this issue. There are a couple other solutions that you can try before replacing the printhead. Take a look at the solutions in the following document to see if they help:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02207121&cc=us&dlc=en&lc=en&product=4083969&tmp_track_link=ot_search
I'm sorry to hear you are experiencing this issue. There are a couple other solutions that you can try before replacing the printhead. Take a look at the solutions in the following document to see if they help:
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02207121&cc=us&dlc=en&lc=en&product=4083969&tmp_track_link=ot_search