Overview
If the correct media has already been loaded into the tray and confirmed at the printers front panel, then check the settings of the application sending the print job
Make sure the application has defined the document as that which matches what is loaded into the printer's tray.
Make Sure That Paper of the Correct Size is Loaded in the Paper Tray
Make Sure the Paper is Loaded Correctly in the Tray
Power Off the Printer, Wait 45 Seconds, Then Power On the Printer
Escalate to the Next Level
