How to do if the computer does not connect to the Internet? Replace the computer MAC address

Recently, the small unit where the small series was replaced has replaced several new computers. After the installation is completed, it is found that the computer cannot be found on the network. After learning about this small series, I finally solved the problem successfully. Now I will share with you and hope to help the netizens who have encountered the same problem. The following method is for the same network interface, the old computer is replaced by a new computer and the Internet is not available.
Methods/Procedures
1. Another reason why computers in the LAN cannot be connected to the Internet may be caused by static binding. When the computer is replaced, the MAC address of the new computer is different from that of the old computer. For this, we first obtain the IP and MAC address of the old computer: Open the “Run” dialog box and enter “ldd; cmd”.

2, in the open MSDOS interface, enter "ldconfig; ipconfig /all", you can view the physical address and IP address of the network card.

3. Next, open a new computer and go to “Network and Sharing Center", click “Change Adapter Settings” item.

4, double-click "local connection", click the “Configure” button from the pop-up window.

5. In the "Properties" window that opens, switch to the "Advanced" tab, click on “Network Address", and enter the previously obtained MAC address, click “OK” ; button. Figure:

6, and then according to the previous method of obtaining the old computer IP address, the same settings for the new computer. Finally, you can try to reconnect.