I did have this problem once or twice and a power-off/power-on cycle fixed the problem and the wifi router built into the Fusion was visible.

The Fusion has a black sticker on one side that covers the hole in the metal case through which the wifi/BT antenna transmits and receives. This slot is on the opposite side of the status LED's. It is possible, (but probably doubtful) that if you move around the plane to the other side you might see the signal.