When the computer is connected to the internet cable but cannot access the internet, the following aspects can be used to troubleshoot and solve the problem: 1. Check the physical connection
Network cable connection: Ensure that both ends of the network cable are securely plugged into the Ethernet interface of the computer and router (or modem), without looseness or breakage. You can try replacing the network cable with a new one to eliminate the possibility of cable damage.
Device status: Check if the router and modem are working properly, and if the indicator lights are on properly. If the indicator light is abnormal, try restarting the device. Turn off the device power, wait for about 30 seconds, then turn it back on and observe if the indicator light status returns to normal. 2. Check computer settings
Network card driver: Ensure that the computer's network card driver is up-to-date, or at least suitable for the current operating system. You can check the status of the network card through the device manager. If there is a yellow exclamation mark next to the network card, it indicates a problem and you can try updating or reinstalling the driver. Recommend using professional driver management software (such as Driver Life) to automatically detect and update driver programs.
IP address and DNS settings: In Windows systems, you can enter the "Network and Sharing Center" through the "Control Panel", click on the currently connected network, select "Properties", double-click "Internet Protocol Version 4 (TCP/IPv4)", and ensure that it is set to "Automatically obtain IP address" and "Automatically obtain DNS server address". 3. Using network diagnostic tools
Windows Network Diagnostics: In the Windows system, open Control Panel, select Network and Sharing Center, click Troubleshooting, select Network and Internet, then click Internet Connections and run the diagnostic tool. This tool can automatically detect and fix common network issues. 4. Check firewall and security software
Sometimes firewalls or security software may block network access. You can try temporarily disabling these software to see if the network connection can be restored. If you can access the internet after disabling it, you can consider adding your browser or application to the exception list of your firewall or security software. 5. Reset network settings
If none of the above methods can solve the problem, you can try resetting the network settings. In the Windows system, open "Settings", select "Network and Internet", click "Network Reset" in the "Status" tab, confirm the reset operation, and restart the computer. 6. Check the network supplier
If none of the above steps can solve the problem, it may be an issue with the internet service provider (ISP). You can call the ISP's customer service hotline to check the service status, confirm if there are any network failures or maintenance notifications. At the same time, confirm whether the ISP account has been overdue or expired, causing the service to be suspended. 7. Seeking professional assistance
If the problem persists, it is recommended to contact a professional computer repair service provider or IT technician to assist in troubleshooting and resolving the issue.
By following the above steps, you should be able to solve the problem of your computer being unable to access the internet when connected to a network cable. If the problem persists, a deeper examination of network configuration or hardware failures may be necessary.