Solutions
Perform the nozzle check, and then try Cleaning or Power Cleaning if the print head nozzles are clogged.
Checking and Cleaning the Print Head
Running Power Cleaning
Adjusting the Print Quality
Make sure the paper size in the print settings matches the actual paper size.
See the following to prevent multiple sheets of paper from being fed into the printer at the same time.
Several Sheets of Paper are Fed at a Time