Solutions
Perform a nozzle check to see if the print head nozzles are clogged. Perform a nozzle check, and then clean the print head if any of the print head nozzles are clogged. If you have not used the printer for a long time, the print head nozzles may be clogged and ink drops may not be discharged.
If you printed when the ink levels were too low to be seen in the ink tank windows, refill the ink tanks to the upper lines and then use the Power Cleaning utility to replace the ink inside the ink tubes. After you use the utility, perform a nozzle check to see if print quality has improved.