GW55,   Some you press Fn and F2, some F2 and some have a switch on the side.   Make sure it enable in the BIOS, press F2 at the Dell Screen.   Make sure it's enable in the Device Manager.   Make sure it's enable in the Windows mobility center.  [IMAGE]     Rick
Has been working for fine for a long time.  Whilst logged-in, lost connection and device show as "off".  The Windows diagnostic tool says card off, please switch it on.  The FN + F2 key has no effect (there is no physical switch on my model).   Running the hardware diagnostic in the Dell WLAN card utility shows  "passed" for everything. Re-booting; and Windows roll-back both have no effect.  
WLAN card cannot turn on