Ethernet ports not connecting to router

[Kemik]

Hi guys,

I have a computer I built around 2015 that uses a Gigabyte Z77N-WIFI S1155 Intel Z77 DDR3 mITX motherboard.

If I connect the Ethernet socket in my room to another laptop, it works fine, connects to the internet, etc. However, if I take the same Ethernet cable in the same socket, and connect it to either one of the two computer ethernet ports - nothing. I've tried uninstalling the drivers and reinstalling them several times. Also reset bios and restarted the router.

I've also tried connecting a Powerline to the ethernet wall socket and then a different ethernet cable to the other powerline plug and then to the computer. The computer detects the powerline plug but doesn't detect an internet signal.

I'm not sure if the router (Asus RT-AC1200G+ Router) is being funny or the motherboard is being funny. Any ideas on steps to troubleshoot and fix? The router has no issues feeding internet to any of the other devices attached to it.

Cheers

 

[Kemik]

What does IPCONFIG /ALL at the command prompt tell you?

Spoiler

C:\WINDOWS\system32>ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : Sean-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Ethernet:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
Physical Address. . . . . . . . . : 90-2B-34-5E-B5-AB
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Ethernet adapter Ethernet 2:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller #2
Physical Address. . . . . . . . . : 90-2B-34-5E-B5-A9
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Wireless LAN adapter Local Area Connection* 2:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter
Physical Address. . . . . . . . . : 84-A6-C8-2F-9C-94
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Wireless LAN adapter Local Area Connection* 6:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Wi-Fi Direct Virtual Adapter #3
Physical Address. . . . . . . . . : 86-A6-C8-2F-9C-94
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Wireless LAN adapter Wireless Network Connection:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) Centrino(R) Wireless-N 2230
Physical Address. . . . . . . . . : 84-A6-C8-2F-9C-93
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Ethernet adapter Bluetooth Network Connection:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network)
Physical Address. . . . . . . . . : 84-A6-C8-2F-9C-97
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes

No lights on either end.

 

[Kemik]

With the help of a cable tester I worked out it was the socket. Luckily it was just the electrician hadn't installed wire 3... All sorted now! Cheers guys