Within the last few days I've been having issues with my wireless connection on my MacBook (aluminum unibody). I have an AirPort Extreme base station. When I have my MB connected to my external monitor and the lid closed, the wifi works as normal. However, when I use the MacBook normally i.e. with the lid open, the wireless connection does not work. It even has trouble 'seeing' my wireless network. And when it does see the connection, it asks for the password but then gives a 'connection timeout' error. My wife's ThinkPad (wireless G) connects fine to the Airport network, as do our iPhone 4s. Although, every now and then, the wifi connection drops on the iPhones. I don't know whether the problem lies with my AirPort Extreme, or with my MacBook? I just find it really strange that the connection works perfectly when the MB lid is closed. If anything I thought it would have been the opposite. Any suggestions as to what I should do? P.S. I've already carried out a factory reset on the AirPort Extreme.