No internet on HP Pavilion Notebook

Question

I have an HP Pavilion notebook. It's a ze2315us. The power cord was jerked out of it and it damaged the input on the power connector board. I replaced the power connector board and that works great now. The problem is that now I cannot connect to the internet via wireless or ethernet. It was working fine before the power connector board was replaced. Now it does not even recognize that I have plugged an ethernet cable into it. I used the exact factory part ordered from HP. Where would you guys suggest I begin in troubleshooting this problem?