What should I do if the Win7 broadband connection has an error 651?

The error 651 is usually expressed as: the computer network card indicator is not lit or blinking.

The meaning of error 651: A communication error has occurred between the user's computer and the carrier's server.

To solve the broadband connection error 651:

1. In the Win7 operating system, first open the Network and Sharing Center, find the change adapter settings, right click on the local connection to select properties, click Configure, Click on the connection speed and duplex mode, select 100Mbps full duplex, and confirm exit.

2. It can also be judged whether the status light is normal or not by checking the Modem to determine whether it is caused by the disconnection of the network connection line.

3. After checking the above processing methods, it still cannot be solved. It may be that the ADSL Modem is damaged. You should contact the carrier in time, they will usually replace it for you free of charge.