From the home screen, touch Settings > Reports > Network > Network Setup Page.
Check the first section of the network setup page, and confirm that the status is connected.
If the status is not connected, then the LAN drop may be inactive, or the network cable may be malfunctioning. Contact your administrator for assistance.
Checking the printer firmware to latest version.
This article serves as a guide to gathering necessary information before opening an escalation item for network connectivity issues.