I have a Black MacBook and have been able in the past to log on to my wifi with my MacBook. All of a sudden the MacBook can not connect with it. My Mac mini works ok with the router and they're both in the same spot. I know the airport card works, because I can connect to any other wifi spot, but my home one. Anyone have any ideas as to what I can do? The genius at apple checked the MacBook through and through and said everything was fine. Comcast was of no help, they said it was the computer. Should I buy a linksys or airport express router?