I have an hpphotosmart 6520. The black ink is not working correctly. I did the align printer and cleaned the printhead. After a couple times doing this the black is darker but now there are bare lines across all the way down the page. Do you have any other suggestions. I put in a new cartridge thinking maybe the old one which was full was the problem.
venmartin Changed status to publish August 13, 2018
Similar problem. My black ink cartridge was clogged and after cleaning it myself, remove the ink cartridge and clean with a damp cloth. the problem was solved
venmartin Changed status to publish July 11, 2018