Hi, I have a old computer (iMac 3 Flat Panel) I want to bring back to life. But I don't know if it's wireless or not. I am trying to use my old AirPort Express A1084 to see if that creates anything to connect to. I plugged my AirPort Express into a outlet near the iMac and it just has a orange light. I am generally confused about all this AirPort Express thing. Can I have help?