ASUS S550CM series Ethernet card cannot be connected, please try the following operations:

1. If the network connection icon in the notification bar shows Not Connected - Connection Unavailable, please check whether your network cable and interface are damaged. Replace other network cables to see if the problem persists.

2. Temporarily turn off your anti-virus software and network firewall to see if the problem still exists.

　3. If you use a router to connect to the Internet, please check whether your router is set to automatically disconnect when idle.

4. Turn off the power saving mode of the network card: Right-click the Computer icon, select Properties, and enter the Device Manager.

Right-click your Ethernet card, select Properties (this machine model is Atheros AR8131 PCI-E Gigabit Ethernet Controller), and enter the following interface:

Uncheck Allow the computer to turn off this device to save power and click OK.

5. If the device manager shows that the network card driver is not installed properly, please reinstall the corresponding network card driver.

　6. If the Ethernet card device is not displayed in the device manager, please press the key to enter the BIOS when booting, press the key to load the default settings, and then press key to keep settings on restart.

If the Ethernet card still cannot be displayed in the device management, please update the BIOS to the latest version.

7. If you have tried the above steps but the problem still cannot be solved, please use system restore or system installation CDReinstall the operating system from disk.

Please back up your important files and then follow the steps in the user manual to reinstall the operating system.