If you are comfortable doing so, please try the following. 

(If not, please put in a ticket and await assistance from your site tech.)

1. Unplug power from your printer either from the wall or back of the device. 
2. With power unplugged, hold down the power button for at least 30 seconds. 
3. Plug power back in. 
4. Try sending another print job. 

Still not working? Please put in a ticket and await assistance from your site tech.