If the wireless router's DHCP is enabled, set the printer's TCP/IP settings to Auto.
If the printer’s Obtain IP Address setting is set to Manual, the IP address you manually set is invalid because it is out of range (for example: 0.0.0.0). Enter a valid IP address from the printer’s control panel.
Turn off the wireless router. Wait for about 10 seconds, and then turn it on.
Reconfigure the printer's network settings.