Hi, After I took my G4 tower in for repair by an authorized repair center, I cannot hook up to the internet. It will hook up at the repair shop. I have a MacBook Pro and an iPad that will hook up just fine. When I power up the G4, it asks me which network I want, but can't find it. The wi-fi on top of the screen does not show the wi-fi as active. If my neighbor get on his computer, his networks show on my screen. Anyone out there that can help me? Pat in SE GA