Wifi stopped working suddenly

wifi stopped working suddenly? and will not turn on in system preferances
Under the Advanced wi-fi Address: 00:00:00:00:00:00
Just clicked on the wi-fi symbol on top bar (sorry do not know name of bar, if some else dose?) and it states that No Hardware installed
Any help please.

I can add my macbook pro to the list of 'wifi: no hardware installed' victims.
At the London Regent Street Store yesterday (after an hour's wait beyond appointment time) the Genius test said it was a hardware fault and the airport card must be faulty/dead. However, when I got home I turned the mbp on and, as if by magic, wifi was working normally. About 3 hours later it failed. I switched off overnight. It's been dead most of the day so I did a complete clean up using Onyx, restarted and, yes, you guessed it, wifi was back.
I guess it could be a faulty airport card but it seemsthere are an awful lot of airport cards failing all at the same time! Coincidence or a software glitch post 10.7.2? Various forums now seem to have plenty of entries from mac owners with this same problem.
How do we get an official response from Apple on this? In my experience Apple are fantastic at addressing this kind of issue once they know. How can we ensure they are aware?
Macbook Pro 2.6 17" OS 10.7.2

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My macbook pro wifi stop working suddenly, and know appears a X on the wifi icon, what may have happened?

Hello,
My macbook pro wifi stop working suddenly, and know appears a X on the wifi icon, what may have happened?
Its seems to be the harware.

Hello raphaelitajuba,
The article linked below provides information regarding this indicator and steps that can help restore functionality to your MacBook Pro's Wi-Fi.
AirPort has detected a problem with the driver or a necessary sub-system component, apply the latest manual AirPort software update or reinstall Mac OS X. If reinstalling Mac OS X does not correct the problem, take your computer to an authorized Apple service center.
The AirPort status menu (AirPort Menu Extra) FAQ
http://support.apple.com/kb/HT3821
Cheers,
Allen

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Hi,
I bought my NB520 in Singapore.
The WIFI was working properly for almost 3 years until recently I have this strange problem.
It stopped working suddenly on its own last June for almost 2 weeks.
Just when I was about to send it to the repair centre, it came back on again.
But the WIFI comes on and off for a few more weeks before it stabalised.
It works ok ever since, until 3 days ago it went off again like the last time.
Usually, when I switch on the netbook, the WIFI indicator (red light) will come on within seconds.
To use Bluetooth, I just right click on the Bluetooth icon and press "Enable Bluetooth Function" and Bluetooth will turn on.
But now when I do that, it tells me to "Plug in Bluetooth device".
Is this a hardware or software problem ?
I spoke with a local technician but she is unsure too.
Would appreciate if you can help me with this problem. Thanks in advance.
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Fionna

> Is this a hardware or software problem ?
This can be answered very easily recovering the notebook back to factory settings.
But I guess this is not an option for you at this time. Isnt it?
However, the issue you are talking in your post looks like the WLan isnt enabled and chosen properly.
Usually you can use the FN + F8 key combination to enable and disable the WLan and BT module.
Pressing both keys would switch between WLan and BT as well as disable and enable the modules.
Did you test this in the past?
In case the FN + F8 would not work as it should, I would recommend you to download the Wlan driver from Toshiba page released for this notebook series and to reinstall the Wlan driver.
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Does the iOS device connect to other networks?
Does the iOS device see the network?
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Try right next to the router
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Try the following to rule out a software problem:
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http://support.apple.com/kb/ts1398
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http://www.apple.com/support/iphone/assistant/phone/
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Wifi stopped working suddenly

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