1, it may be a data problem. Restart the light cat and router devices. Restart the operation, that is, turn off or unplug the power switch of the optical cat and router, and restart after a few minutes of power failure. Turn on your phone or computer, connect to the wireless network and see if it works.
2, it may be a network problem. Pay attention to whether the router signal lamp is always on as usual, which is mainly different from the signal lamp. The signal light is not on, which may be caused by the disconnection of the external network cable. This can be done by calling the operator's service phone.
3. The network is working normally, but the TV is not working. Turn on the TV-Menu-System Settings-Network Connection/Wired Connection/Wireless Network Connection. Depending on whether the TV is normally connected to the network and whether the wired and wireless networks are reconnected, you can choose to connect.