Laptop WiFi Won't Turn On

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Ultimate, Service Pack 1, 32 bit
Processor: Intel(R) Core(TM) i5-2430M CPU @ 2.40GHz, x64 Family 6 Model 42 Stepping 7
Processor Count: 4
RAM: 3112 Mb
Graphics Card: Intel(R) HD Graphics Family, 1364 Mb
Hard Drives: C: Total - 56924 MB, Free - 11097 MB; E: Total - 652257 MB, Free - 14516 MB;
Motherboard: LENOVO, KL6
Antivirus: Microsoft Security Essentials, Updated and Enabled

I've got a Lenovo ideapad Z470 laptop and the WiFi modem/card in it won't turn on.

The laptop has a physical switch on the front which turns on/off the wifi.

If I turn the switch to on, an image appears on the screen saying its been turned on and vice versa if I switch it off.

However, Windows isn't showing it as being available in the system tray.

I can connect via ethernet and have tried using the Wifi to connect to two different networks and it looks like the card is the problem.

If you look at my previous posts, they have been about my laptop not connecting to the internet. Perhaps this is why?

Can they be fixed or replaced?

Thanks.