Sometime a small switch on the side or front of the case gets turned off accidentally. You might also have a Function key with the wi-fi icon printed on it and touching that - with or without the Fn key might put it back on.
Sometime a small switch on the side or front of the case gets turned off accidentally. You might also have a Function key with the wi-fi icon printed on it and touching that - with or without the Fn key might put it back on.