WIFI is not connecting in laptop

Hi
          My laptop is G500 in that i have installed windows 7 operating system. WIFI is not showing while pressing the Fn+F5 or the key in side. And the drivers are updated correctly. There is no problem in that.
then i give it to One of the service centre they are telling to change the motherboard. For WIFI connection do i want to change the motherboard??? 
Please someone help me to get rid of this by finding some other way.
Thanks.

hi,
 by saying that all drivers have been installed are you sure you have install the one called ''Energy management"...
i have an s10-3 so i am not sure yours has the same name but this driver helps activate or deactivate several components such as wifi, bluetooth,digital camera etc... give it a try

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    ~~~~~~~~~~~~~~~
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    ~~~~~~~~~~~~~~~~~~~~~~~~~
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    http://support.apple.com/kb/TS1559
    ~~~~~~~~~~~~~~~
    If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
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