What should I do if I am unable to print from my HP Photosmart 5520?

First, check for error messages and resolve them, then verify the printer is set as the default printer and is not offline by right-clicking the printer icon in your OS settings. If still unable to print, try restarting the computer and resetting the printer by turning it off, unplugging the power cord, waiting a minute, then plugging it back in. On Mac, also check the print queue and delete or resume any stalled jobs. (Page 3)