[Full Fix] Connection Failed with Error 651

Posted by Michael Smith on December 23rd, 2020

Error 651 tends to be a typical error in broadband connection. It may be due to port error, ISP error, modem configuration changes, corrupt drivers, block in connection with applications running on the device, etc....

Try the steps below,

• Rebooting either the device or the modem, or both at a time, can correct the error.
• Proper Connections: Make sure the modem DSL is reliable and has a proper port or access link. Or try fixing it, because an unstable DSL or port problem can report an error of 651. Also, make sure that the Ethernet and DSL lines are fine, and both can plug in correctly. That is, ensure that both indicators are steady at the modem.
• Reconfigure modem: In most cases, the modem reconfiguration addresses the error. If an error occurs without any modification by user, pre-configuration or default settings should be noted.
• Port reset: Please contact your internet service provider to reset the port. Or link from exchange to troubleshoot the error. This is the most efficient approach for fixing 651 errors. If the modem connects correctly to the telephone exchange, the fault is in your modem or device.
• Driver Settings: Reinstall and upgrade the existing LAN or modem drivers to the new version.
• Replacing rasspoe.sys: Some people have advice that replacing rasspoe.sys will fix the error.

C:\Windows\System32\rasspoe.sys

Replace the file rasspoe.sys from another device that works correctly (Backup before removing the older file). It doesn't work all the time, try it, too.

Disable running application: try to link by disabling antivirus, third party firewall, etc.

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