I am in the process of having my motherboard replaced for the second time because the network drops out if I touch the cat 5 cable where it plugs into the laptop. Or better yet don't touch it and it drops out on its own. Move the cable or unplug and plug back in and connection is back.

 

I'm sure they are refurbished MB but can they all have the same problem. Online chat has got a clue we just replace the MB????????????