How to switch on wifi in acer aspire 4736

[Janani]

I have an acer aspire 4736 laptop. There isn't any button or switch to switch on my wireless connectivity.
So please help me out , how do I access wi-fi in my laptop???

 

[Pyree]

Look at your keyboard, is there a key with a little broadcaster/transmitter icon? hold the fn key with that key together to switch on wifi.