1. Unplug the network cable, restart the router, and plug in the network cable after the router is fully started.
2. Disable the local connection adapter in the network connection, and then turn it on again.
3. Try to fix the ip address and dns address, and don't use dhcp to allocate ip. The specific method is not Baidu.
4. If it still doesn't work, it is possible that the router circuit is damaged due to sudden power failure, but this possibility is very small. Generally, routers have power failure protection. Try another router or another computer.