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I accidentally pressed Fn+F12 on my HP dv6 laptop, which turns off my Wifi. When I tried to do the same to turn it back on, it said "Airplane Mode Off" on the screen, but wifi still wouldn't work again. I tried pressing it a few more times but all I was doing was turning Airplane Mode On and Off.

I restarted my computer, but still Wifi wouldn't come back on. All I see is a little x over the signals icon you would normally press to select a network.

How can I get my Wifi to work again?

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Reset to default
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I solved the issue by going to Device Manager

Start > "Device Manager"

Opening the Network Adapters section. Clicking on the Wifi device (in my case Ralink RT5390R), clicking on the Advanced Tab, selecting Radio On/Off and then on the right side, selecting Enable from the dropdown.

Now it works!

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    Additionally you can try to delete the hardware driver and restart your laptop to make it detect wifi device and install it again . This can solve the issue too.
    – TechLife
    Commented Mar 29, 2015 at 18:01

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