To fix any network cable errors on your internet connection, try the following actions:

1. Check that the cable is securely plugged in at both ends.
2. Make sure the modem and router are both powered on.
3. Reset your router/modem by pressing the power button for 10 seconds.
4. Reboot your device.
5. Verify the network drivers are up to date.
6. Replace the network cable with a new one.