There is an exclamation point on the connector, but I just can't connect it. It is because there are too many connected people that it is difficult to connect to the network after being squeezed by others (the wireless network shows that it is connected, but it can't access the Internet), but it still keeps connected. Try again another day.

I suggest you rule out whether there is a problem with the hardware driver first.

If there is no problem: this situation may be that the access point is limited and your computer has not obtained a valid IP. Solution: Set your notebook IP to manual IP, refer to other students' computers or notebooks that can get valid IP normally, and change the last IP address.

I hope I can help you.