I have a new wifi router and my Macbook Air connected to it smoothly for the first week. Now the wifi is just not visible on the laptop. I continue to connect fine with my iPhone, iPad and Lenovo Thinkpad, so its definitely not an issue with the router.
I also tried to manually identify the network and connect to it, but that does not work as well.
Has anyone faced this earlier and knows the fix?
MacBook Air (13-inch Late 2010), OS X Mountain Lion (10.8.3)