My macbook is about 18 months old and I have always used it to connect to the internet through the airport connection. Suddenly yesterday while I was connected to a wireless signal it cut out and then the wireless signal was unable to be found, and none of the other 6 or 7 signals that were there could be found either. I have tried on numerous different signals and in using my fiance computer found many hot spots for numerous signals and my macbook doesn't even recognize that they are there much less connect to them. Under the airport icon on my menu bar it says airport: on and then below in gray it states No Networks Available. DId my wireless card go bad? Someone please help!!