Diagnosis
The fan has lost all power, and it's not the outlet. The internal fuse on the main control board has likely blown. Yeah, this one's common, especially after a power surge or if the motor drew too much current.
How to Fix It
Unplug the fan. You'll need to open the base housing. Remove the rubber feet to find the screws. Once inside, look for the small glass fuse on the circuit board. On this model, it's a standard 250V 2A fuse. Replace it with an identical fuse. Reassemble and plug it in. That usually brings it back to life.
If That Didn't Work
If the new fuse blows immediately or the fan is still dead, the power supply circuit on the main board is probably fried. At that point, the repair gets into component-level soldering, which isn't practical for most people. The board itself isn't a standard user-replaceable part.
Heads Up
Be really careful with the plastic clips when prying the housing open. They're brittle and snap easily, which will leave the base wobbly even if you get the fan working again.