teamtech posted an answer for this HP LaserJet Pro 400 color M451dn - Printer - color - duplex - laser - Letter/ Legal - 600 dpi x 600 dpi - up to 21 ppm mono / up to 21 ppm color - capacity: 300 sheets - USB/ 10/100Base-TX:
"make sure you have removed an orange small plastic piece if u don't remove printer will..."
teamtech posted an answer for this HP Photosmart D110A Multifunction Printer CN731AB1H:
"https://goo.gl/HCdPe8 try to remove the old driver reinstall the latest driver if the..."
363,318 people helped