Try the simple thing first. After each step try and print.
Turn off the printer then turn it back on.
Turn off the printer, shut down the computer. Turn the computer back on. After it has booted back up turn on the printer.
Unplug the printer for a few min then pucg it back in.
Uninstall the printer from you system. Shut down the printer. Reboot the system to make sure it is not still on you system. Then follow the printer's instructions for installing the printer.
Other might have some ideas if those don't work.