This would probably due to one of these two reasons
Either the print head is clogged or is worned out.
Remove the printhead.
Note: If the print head lock lever's tab is visible, proceed to step 5. If the print head lock lever's tab is not visible, continue to step 3.(print head lock lever's tab visible)
(print head lock lever's tab not visible)
3.Press and hold the Resume/Cancel button for more than three seconds. (The print head will move to the right a little.)
4.Confirm that the print head lock lever is visible.5.Hold and lift the print head lock lever.
Caution: The print head should not be touched during this operation to avoid possible damage. 6. Hold and slowly move the print head lock lever up and down several times.
8.Lower the print head lock lever to lock the print head in place.
9.Close the print head cover.
After removing the printhead, soak it in rubbing alcohol for 10 minutes, Remove it from the alcohol and shake it off then dry the head with a hair dryer with a COOL setting. Put it back to the printer, returne the cartridges, and performe a deep clean in the Maintenance settings.