The wireless card seems to be switched on but it does not not pick up any networks and is essentially useless.
1. Open a terminal
2. Input the following:
$sudo modprobe -r iwl39453. In the blank file enter the following:
$gksudo gedit iwl3945
alias wlan0 iwl39454. Save the file and close it
5. In the terminal:
$sudo modprobe iwl3945Wait a few minutes and hotspots should start showing up.
$sudo ifconfig wlan0 up