What should I do if I pay the fee but can't receive the signal after wifi is in arrears? The computer can't find it either.

Generally speaking, it can be solved by turning off the power of the router for a few seconds and then plugging it in.

If it still doesn't work, turn on the router to see the network parameters-> Select automatic connection in WAN port settings, automatically connect this option after starting and disconnecting, and then click Connect. If this still doesn't work, please call the operator (usually telecom), ask the human customer service to brush the port for you, and then repeat the above steps in a few minutes. This should solve the problem.