How do I troubleshoot a wireless network connection issue on the M277?

Verify that no network cable is connected, as the printer cannot connect to a wireless network when a network cable is plugged in. Ensure the printer is within 30 meters (100 feet) of the wireless access point, and that the printer and computer are on the same wireless network. You can also run a diagnostic test by going to Setup > Self Diagnostics > Run Wireless Test on the control panel. (Page 11)