I have bought and installed 2 new ink cartridges, black and all 3 colors and my black ink still will not print and I've exhausted almost all of my new ink on diagnostic printing! I've cleaned my print head and even the screening where the ink flows thru the printer and I still get no ink to print in there black box on the diagnostic print report! I am beyond frustrated as im wasting my time and money trying to figure this out! I needed to get a label printed to get in the mail, which isn't happening today! Please help!!!