What to do if computer broadband connection error 678 occurs

What to do if the computer broadband connection error is 678?

Error 678 is a fault prompt often encountered by PPPOE dial-up Internet users. To put it simply, the network connection failed. The common reason is that the channel between the user's modem and the ISP equipment is blocked.

Solution

Close adsl or modem, enter the network connection in the control panel, right-click the local connection and select disable. Wait 5 seconds, then right-click the local area connection and select Enable. Then open adsl or modem to dial. If you are a user who logs in directly via network cable, you can disable local connection and then enable it.

2. Check whether the dial-up username and password are correct. If correct, delete the dial-up connection and try creating a new dial-up connection.

Check whether the network card light is on and confirm whether the network cable connection is loose or intact. If the light doesn't come on, try replacing the network cable. If the problem is not solved, the network card may be damaged or the driver is wrong. You need to consider replacing the network card with a new one or reinstalling the network card driver.

4. Check whether the ADSL or MODEM power supply is passed, whether the line connection is normal, restart ADSL or MODEM, and tighten the connection line.

If multiple computers use a router to access the Internet, you can try to disconnect the router and connect directly to the Internet. If you can successfully access the Internet, the problem may be with the router. It is recommended to check and repair the router fault, or consider replacing it with a new router.

6. Confirm whether the payment is in arrears. If it is due to arrears, just pay the broadband fee.

7. Call the operator to confirm whether it is caused by the operator's line. If you are waiting for the operator to resolve the issue, try again.

What’s wrong with broadband connection error 678

678 means:

The remote computer does not respond; that is: the computer issues instructions to the network card to send data outward, including the uplink circuit of the telephone line transmitted to the port of the terminal board of the central office (telecommunications office room); the central office (telecommunications office room) If there is a problem with data transmission from the port processing of the terminal board to the downstream circuit of returning data to the computer, a 678 error will be prompted. In other words, the network is down.

678”Processing steps and methods:

1. Have you touched the cat's connections or lines recently? Then check whether the light on the "cat" flashes. If it flashes, check whether the wiring is correct. If it still flashes, check whether the phone line has connectors. Poor oxidation of the line and poor contact will also cause unstable signals

2. Confirm that the modem dial-up is normal. The IP that the network card will automatically obtain has not been cleared. Therefore, when dialing again, the network card cannot obtain a new IP address and will prompt 678; the operation method is: close the modem, enter the control panel and right-click the network connection. Select Disable Local Area Connection, right-click Local Area Connection after 5 seconds and select Enable, then turn on Mode Dial-up;

3. If the first step is invalid, close the modem, still disable the local connection (network card), restart the computer, then enable the local connection (network card), and then open the modem to solve the problem;

4. If the above steps are invalid, check the network card and network cable.

5. The network card light is normal, but steps 1 and 2 are invalid. Uninstall the network card driver and reinstall the network card driver.

6. If the above operation is invalid, contact the telecommunications department to confirm the port. Check to see if the port at the telecommunications office is loose, causing the line to be blocked.

7. Multiple computers are connected to a HUB, network switch, router, etc. When the access port of the public equipment is damaged, "678 error" will also occur. Just replace the port.

8. Sometimes, although the network condition is normal after being tested by telecommunications, a "678" prompt will still appear. At this time, conflicts with various application software must be considered. For example, "Yahoo Assistant", anti-virus software or firewall may have abnormalities, causing a "678" prompt. When you find the error "678" prompt, first uninstall "Yahoo Assistant", exit the anti-virus software, or temporarily turn off the firewall and reconnect to see if the problem is solved.

9. When the above method is invalid: Restart "Cat" and the computer, it may be effective.

10. If it doesn’t work, call 10,000 to report for repair

The above is the detailed content of What to do if computer broadband connection error 678 occurs. For more information, please follow other related articles on the PHP Chinese website!