Fault 1: Incorrect line connection. The connection of this router is that the network cable or ADSL cat cable should be connected to the WAN port of the router, and the computer cable should be connected to the LAN port of the router.
Fault 2: You need to check the operator's online mode, such as choosing PPPOE if you have a broadband account, and choosing dynamic IP (automatic access) if you plug in the one that can be used directly.
Fault 3: Wrong Internet access mode selection or wrong broadband account number and password input, which needs to be verified with the operator.