After the wireless network card is plugged in, the status is irrelevant. Before the connection, it suddenly failed. But you can connect to a cell phone hotspot.

If the wireless network card is plugged in and disconnected, it can be connected before, but suddenly it will not work, but it can be connected to the mobile phone hotspot, and the troubleshooting can be solved through the following steps:

1. Check whether other devices are normally connected to this wireless network (excluding whether it is a router problem);

2. Turn off and restart the mobile phone and the router respectively;

3. Enter Settings, select Connect, click WLAN Settings, click the network to be deleted, select Forget Network/Delete Network, and then reconnect WLAN;

4. Check whether there are multiple devices connected to the wireless network, and suggest to try again another day;

5. Reset the router;

6. Try to change other wireless networks;

7. Back up the data in the machine (such as contacts, short messages, multimedia, etc.). ) and try to restore the factory settings.