The computer network cable can t be connected, it seems to be an error 678, it seems to be 789, what

1. Broadband Internet display "error 678", it is caused by modem damage, poor contact of network cable and network card, ** line obstruction, etc., if there is a router, it is recommended that you can first power off and restart, if it is still not available, it is recommended that you remove the router and check whether the modem signal light is normal:

1. If it is normal, please try to restart the network card, unplug the network cable, and restart the modem;

2. If it is not normal, please try to unplug the ** cable, restart the modem, check whether the separator is connected correctly and unplug the above cable.

2. If it cannot be solved, you can contact the local manual customer service for feedback.

The meaning of error prompt 678 is: the remote computer is not responding, which means that the computer sends instructions to the network card to send data outward, including the transmission of ** line, and the port of the terminal board of the central office (telecommunications office computer room end) processes the data transmission problems in the process of returning data to the computer. To put it simply, the network is not working.

Solution ideas. Has your computer been touched lately? In particular, have the ADSL modem wiring and lines been moved?

Please first check whether the signal light on the "cat" will flash, if you want to flash, check whether the line is connected, if it is still flashing, check whether the line has a joint, and the signal will not be stable if the line oxidation contact is not good (**The crystal head or line of the line into the cat is problematic, and it will also cause the line to be blocked. ）

Confirm that the ADSL modem dial-up is normal, because the IP automatically obtained by the network card is not cleared, so when dialing again, the network card cannot obtain a new IP ground key and the address will prompt 678, the operation method is: turn off the ADSL modem, enter the network connection of the control panel and right-click the local connection to select disable, after 5 seconds, right-click the local connection to select Enable, and then turn on the ADSL modem dial-up;

If the first step is invalid, the local connection (network card) is still disabled when the ADSL modem is disabled, restart the computer, then enable the local connection (network card), and then turn on the ADSL modem.

If none of the above steps can solve the problem, check whether the NIC light is on, and if the NIC light is not on, check the NIC. If the NIC light is normal, step 1 and 2 cannot solve the problem, uninstall the NIC driver and reinstall the NIC driver.

If the above operation does not work, contact the telecommunications department to confirm the port. I also encountered the "678" error at home, and I couldn't check any problems at first, but later found that the port of the telecommunications bureau was loose, resulting in the line not traveling bright and scattered.

There is also a situation, I have also encountered, if you have more than two computers at home, the hub port used to connect to the computer is damaged, there will also be a "678 error", then you can replace a good port.

Some of the network conditions are normal after telecom detection, and the error "678" prompt also appears, at this time, it is necessary to consider the conflict of various application software in the process of use, which will also cause the network to be unreachable. For example, "Yahoo Assistant", anti-virus software, or firewall have abnormal errors that cause the error "678". So, if you find the error "678", you can try to temporarily uninstall Yahoo Assistant, exit the antivirus software, or temporarily turn off the firewall and reconnect to see if that solves the problem.

As a last resort, you can restart the cat and the computer to see if it works.

The computer cannot be connected to the broadband and the error 678 remote server does not respond, which is a common fault prompt encountered by PPPOE dial-up Internet users. To put it simply, the network is not working. The common cause of this problem is that the communication between the user modem and the ISP service provider is blocked.

Solution. 1. Turn off ADSL or MODEM, right-click the local connection to disable the network connection in the control panel, right-click the local connection to select enable after 5 seconds, and then turn on ADSL or MODEM dial-up; If it is a direct network cable to the home, the user can disable the local connection and then enable it;

2. Check whether the dialed username and password are correct, if so, delete the dialed connection, and create a new dialed connection to try.

3. Check whether the NIC light is on, whether the NIC cable is loose or intact, and check whether the NIC driver is correct. If the NIC light does not light up, replace the intact network cable, if it does not light up, it means that the NIC is broken or the driver is wrong, replace the NIC with a new one or reinstall the NIC driver.

4. Check whether the ADSL or modem power supply is passed, whether the line is connected normally, restart the ADSL or modem, and tighten the connecting wire.

5. If multiple computers use routers to access the Internet, you can try to remove the router and connect to InterNT. If you can access the Internet smoothly, it means that the router is faulty, and you should troubleshoot the router or replace it with a new one.

6. Check whether there is any arrears. If it is due to arrears, you can pay the broadband fee.

7. Call the operator to confirm whether it is the reason for the operator's line. If so, wait for the carrier to solve the problem and try again.

My computer network is often disconnected My home is equipped with a 2m ** line broadband of telecommunications When the connection is dropped, the adsl light on the cat is flashing Views: 947 Reward points: 20 |Resolution time:

2011-2-11 13:08 |Questioner: 1 inch demon.

Can't connect The prompt is error 678 But after a while, it can be connected again and again It's like this repeatedly drops What's going on I hope you can help me It's so annoying, the question adds:

I found someone to fix it, and I came several times, but it didn't work, and he later said that I should replace the ** cable with a network cable.

Sometimes it drops two or three times a day, and sometimes it drops frequently.

I didn't use the router, it's the telecom cat, and I connected it with a ** cable, and it didn't work, but it fell off when I used it.

Even if the computer is left on, it will fall.

The cat is broken, I've had this kind of problem before, call 10000 and call someone to change the cat.

PS: Error 678 is a line fault. 691 is an incorrect account password. 769 is a network card fault. I used to do broadband, but not telecommunications.

What is the broadband connection error 678.

Check if there is a problem with the network cable first, and then check whether there is no problem with the router...If there are two routers, choose the single interface to be equipped with telecommunications. If it doesn't work, change the IP address....Reinstall the system and update the NIC driver.

Problems with remote computers First look at whether your network card is enabled and then see if there is a problem with the cat Check the network cable connection or not, call customer service, let them see if it is a connector problem, or a problem with their equipment.

It seems that there is a problem with your router, you restart it and try it.

Unicom Broadband Error 769 fault means that it cannot connect to the specified target, the main reason is that the network card is disabled or the driver is lost).

1. Please right-click "Online Neighbors" "Properties" "Local Connection" to check whether the local connection is in the "disabled" state, if so, just double-click the local connection and see the status changes to "Enabled";

2. (If there is no local connection in the attributes) the NIC driver is lost, it is recommended to reinstall the NIC driver;

3. It is recommended to check whether the network card is loose or damaged.

Broadband connection error 769,841 Cause:

1. The NIC is disabled;

2. The network card is damaged or the driver is missing.

Solution: 1. Right-click "Online Neighbors" - Properties, check whether there is a "local connection", if the "local connection" is gray, click the icon and select "Enable", you can connect to the network normally;

2. Restart the NIC or reinstall the NIC driver;

Restart method: Right-click "My Computer" - select "Properties" - click "Hardware" - enter "Device Manager" - select "Wanghuai Xunlu Adapter".

There are too many possibilities for being squeezed out of the line or software conflicts and not being able to get on the network telecom 678 error, and my brother has been troubled recently. Four times a month, I played ** to troubleshoot telecommunications. To sum up the virtues are:

Most of them have nothing to do with the computer, and if you have 360, you don't need to diagnose, and it will prompt that the network card is broken. It has nothing to do with the plug. The main reasons:

1 The quality of the cat is not good, and most of them are now telecommetically configured, and this phenomenon appears the most. Restart for 10 seconds before dialing. 2. Network card or software conflict, redial more and dial a few more times, dial the first three and second lights of the cat to flash quickly and then dial again.

3. If the network signal is asymmetrical, turn off the local connection and turn it on again for five seconds, and then dial it again. Dial a few more times. 4. If there is a system error or a conflict in the running program, close all the current tasks.

Restart the cat for more than five seconds and then dial it. 5. Call ** to troubleshoot. Because many times you can't connect to it, your line is shut down when the telecom network is automatically assigned.

This is now the case in many urban villages, especially the subcontracted private ones. They have a similar bus platform, that is, when the network is good, everyone is good, and when the network is bad, people often squeeze out the line. It used to be called network traffic congestion, but now it is called network automatic allocation.

In the same way that routers can set bandwidth, they are automatically allocated. This is also the main reason why the 678 error often occurs.