Wind 8 system connection network reported 651 error

bought a Sony computer, the network card is realtek pcie gbe.
Buy a router is TP-Link, according to the instructions on the 192.168.1.1 login to set up wireless
connection name, network user name, password, ok.
Sony computer can be connected to the wireless, wired is not connected, reported 651 error, other computers are also connected to the
, began to think that it is a network card driver problem, update driver problem is still not resolved.
It was later discovered that even the network port corresponding to Sony's computer router is not bright, and my heart is a little embarrassed.
I am afraid that it is a network card problem, the same network cable, other computers are ok.
Simply plug the network interface Now, the router's lights are on, and it looks like there is hope.
Restart the computer and set the network connection ip to automatic, it is connected. Finally the problem is solved.