Follow the steps below to check the router settings.
Check the WIFI indicator is on.
Log in to the Home page (Refer to "How can I access the Home page?" in the Basic Settings module)
Go to Settings > WiFi > Basic, make sure the SSID broadcast is turned on.
Go to Settings > WiFi > Advanced, to change the Channel and try again.
Follow the steps below to check the terminal settings.
Refresh the network list on your computer.
Right-click Wireless Network Connection.
Click Open network and sharing center.
Select Wireless Management.
Click the wireless network which is not being used, and delete/forget it from
the network list.Click OK and restart your computer.
Note: Available settings and menus may vary depending on device model and software version.