The Magenta section of the Nozzle Check print example shown in the figure below indicates that multiple nozzles are out.
NOTE
This is an extreme example to illustrate the problem. In most cases you will likely see only two or three nozzles out.
Nozzle Check Print Magenta Section
Once you have identified the particular printhead(s) that has nozzles out as indicated by the nozzle check print, you can perform the Printhead Maintenance procedure.
NOTE
Nozzle Check Print Magenta Section