Today my internet stopped working for no reason. Well, It still works with WiFi - but not with my cable. I'm on OS X El Capitan 10.11.3 I tried deleting "Ethernet" in Network Settings, I when i tried to add it again, There was no "Ethernet" option to choose. I went to System Information / Hardware information and checked "Ethernetcable", It says i have no PCI-card with Ethernet installed. Can it be fixed?