The modem cannot connect to the network, and a 651 error is displayed

If "Error 651" is displayed when you access the Internet in China Unicom, it is mainly caused by the failure to connect the user's terminal computer with the Netcom central office device. Under normal circumstances, it can be divided into five situations:

1.network cable failure; Fault; 3.NIC failure; set by itself; 5.Network operator issues.

Here's how to deal with it:

Please plug the network cable again, ** cable, and restart the cat test;

Please disable local connections before enabling them;

Please reinstall the NIC driver;

If you are using a router, please remove it and dial test it on a single computer.

The "Error 651" displayed on broadband Internet access is mainly caused by the failure to connect the user's terminal computer with the Netcom central office equipment, which is generally divided into five situations: "network cable failure", "modem failure", "network card failure", "modem itself setting", and "network operator problem". Here's how to deal with such cases:

1. Please replug the network cable and ** cable and restart the modem test;

2. Please disable the local connection first, and then enable the local connection;

3. Please reinstall the NIC driver;

4. If you use a router, please remove it, and dial test it on a single computer.

If the problem is still not solved, you can contact the local customer service for feedback.

Light-modem 651 error reason:

network cable failure; modem failure; NIC failure; router issues; Network operator issues. Solution:

Replace the system file: Find the file in the C drive of the system, and then use a computer that can connect to the network, copy the file to replace the file; Problems with the NIC driver: Use the driver wizard and other software to update the NIC driver or fix the stupidity; Restart your computer

Create a new network connection, do not enter the username and password, then connect, observe whether there is a 691 error**, and then enter the username and password to connect to the network; According to the above method, if the problem of error **651 cannot be solved, the computer can only be replaced.

If error **651 occurs, it is recommended that you troubleshoot the problem from the following aspects:

1. Restart the modem and plug in the optical fiber connector.

2. Judge whether the status of the modem indicator is normal, if it is abnormal (the modem lights up red, the PON light flashes, and the indicator light is abnormal), you can call the local 10086 for broadband fault reporting;

3. Remove the router and directly connect to the optical modem to dial-up to connect to the Internet, if the dial-up connection fails, you can further feedback and deal with it through the broadband fault reporting center;

4. Reconfigure the router.

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Look at the cat's signal light first. If the optical fiber PON (network E) is always on, and the LOS (optical signal) is not on, so the signal is normal, so you need to check the user name you entered, the network port light of the network cable between the computer and the cat, and whether the local connection of your computer is disabled. If the cat's signal is not synchronized, turn on the cat after restarting and wait for 3 minutes to see the signal light, and report for repair if it is not synchronized.

I have a way here, that is, when you are powered on, press and hold the restart button of which cat with a toothpick for 10 seconds, after you are done, then power off, and then restart the computer, so that your cat will be obedient, if there is a router, which router should also hold down the restart button for 10 seconds, and which connection line is taken down, all dial out which connection hole, and then connect, because of the restart route, you have to reset the dialing address of the Internet, that is, enter it in the address bar, this has this address behind your router, You press which input,After entering,Set up the Internet account and password number of the route,So that the computer restarts,Connect all the wires,It's OK to get on again,And try absolutely through,Unless your network card is broken,There's no way。 You can only change the network card.

The "Error 651" displayed on broadband Internet access is mainly caused by the failure to connect the user's terminal computer with the Netcom central office equipment, which is generally divided into five situations: "network cable failure", "modem failure", "network card failure", "modem itself setting", and "network operator problem". Here's how to deal with such cases:

1. Please replug the network cable and ** cable and restart the modem test;

2. Please disable the local connection first, and then enable the local connection;

3. Please reinstall the NIC driver;

4. If you use a router, please remove it, and dial test it on a single computer.

It is recommended to try a different cat first. If you can connect to broadband directly through the cat, it proves that the cat was broken before. If it still doesn't work, it proves that there is no signal on the broadband line.

To access the Internet through the router, you also need to set the relevant settings in the properties of the local connection...

I have the same problem as you, has the landlord solved it? Let me know if it's solved.,Thank you.。

The dial-up method did not meet the broadband requirements and was rejected.

How to solve the broadband 651 error.

IP set. Changed to automatic acquisition.