The network port a light on a light does not light, high points for thanks!

Open the device manager, see if the network card driver is normal, generally if normal, it is the problem of the outside wiring, you can other computers on the Internet on the normal network cable plugged into this machine, try, generally no problem. It is likely that some of the details are not done, like this repair work, sometimes the user is very careless, so a little bit of small problems can not be understood.