The second to right LED on the top is actually a button that disables wireless. If you hold it down for 5 seconds, it will disable wireless on the device, and will show it disabled in the GUI but there's no way to re-enable it. To re-enable it, hold down the button again for 5 seconds, the lights for wireless on the left will turn on when it is back on. I was cleaning yesterday and moved the router behind my TV, and the TV was just resting on top of it. I was using it all day but at some point apparently the TV moved enough to push the button... Kind of weird there's no entry in the log of when this is pushed though, too.
