I have a Macbook pro that I purchased about 3 years ago. Out of the box the internet worked fine with our home wireless router and my wife and I were able each be on our mac laptops at the same time. Recently I had an issue where the screen on the Macbook went blank but I could hear the machine running. I took it to a knowledge bar and they fixed it for free because apparently the video cards for macbooks built between 2007-2008 were failing. Once I got it back the internet would not work on the laptop. The wireless signal indicator shows full signal but when I try to go to a webpage I get the "You are not connected to the Internet" message. I have tried setting up my network preferences to match those on my wife's macbook which is currently working. When I go under Advanced to the TCP/IP section, I copy the IPv4 Address from the wife's laptop and use it for mine. BUt then I get the message that I cant use that address because it is already in use. Can someone tell me how to fix the connection issue so both laptops can be used at the same time?