Ethernet doesn't work, PRO4 mobo flashes yellow and has solid red lights when I plug in my ethernet cable.

[FINLAYTIGHE]

My PRO4 mobo is flashing yellow light, and solid red when I plug my ethernet cable in. When I go on to my PC, it says no connections available, and it has a red cross through the internet symbol. I don't have a wi-fi card, so this is my only connection to the internet.

Does anyone know what the problem is?

Thanks,

Fin

 

[Phillip Corcoran]

Did you never think to look in Device Manager before posting? If no network adapter is listed there but you do see "unknown device" error (question-mark), you probably just need to re-install the network driver from ASRock's website:
http://www.asrock.com/mb/Intel/Z77%20Pro4/?cat=Download

However, if no network adapter and no error is listed in Device Manager, the network adapter has most likely failed so you'll have to install a new one (network card) in a spare PCI slot.