Ethernet port and Power LED are not working

I have an FX30 and I’m trying to use Ethernet port but it seems that the port is not working (LED is not blink). I use SSH to login to FX30 via USB, type “ifconfig” and see that eth0 is displayed and obtains IP.

My device can attached to network but Power LED is always Solid Red.

Does anyone know how to fix these problems? Any help would be greatly appreciated.