How to turn on iMac wifi

Apple recall for exchange my iMac HDD and now there is no icon for wifi and I have no wifi?! any body can help?!

System Preferences > Network > check "Show Wifi Status in the Menu Bar"
If no Wifi service is active in the configuration profile, click the + sign at the bottom lefthand of the preference pane and add Wifi.

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yea am using Windows XP on bootcamp partitioned drive
yea its offical XP Home sp2
I am trying to record some audio, playing from a mp4 video,
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Hi
I have the same problem exactly on my 20 in imac with windows 7 . I have spent hours trying to disable this mic . If you find a solution will you please send it to me and I will do likewise .
Regards
Ray
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To have a better understanding of your issue, please let everyone know what operating system (Windows Vista/7/8 or Mac OS 10.X) you have. That way, community will be able to assist you with suggestions appropriate for your product.
If this is an urgent support need, please CLICK HERE to reach our friendly Technical Support Team.

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mserfaty wrote:
I heard about potential wifi danger. Are you sure that when there is no client, the wifi stops difusing the signal ?
You are reading the normal sort of rubbish that flat earthers produce against every new technology.
I don't want to start a new thread about this.. but wifi produces so little signal when it is transmitting that cosmic rays will far exceed your exposure.. so are you going to go and live in a cave??
The signal from the TC when there is no actual data transfer is merely polling. It will do you no harm.. nor will full 100% transmission.. except in the flat earthers view.

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debrafromusa,
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Hello POLLYMER,
Thanks for the question. I understand that your Wi-Fi option on an iPhone 4S is greyed out. The following article explains this issue and potential resolution:
iOS: Wi-Fi settings grayed out or dim
http://support.apple.com/kb/TS1559
Follow these steps to resolve the issue:
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2. Reset the network settings by tapping Settings > General > Reset > Reset Network Settings.
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hi Ralph,
what is the behavior of these devices with respect to surge protection?
to be honest i don't know. we have very stable power supply in Germany.
Can they be placed on the safe side of a surge protector?
don't see why not. i'm using a pair to get internet from the main router to my TC. the TC is operating in +bridge mode+ and creates a separate network for me.
the adapter next to the main router is plugged directly into a wall outlet, the one for my TC is plugged into my iMacs UPS. no problems there.
If you live in a high thunderstorm area like Tampa, FL in the US, you would not even consider using electronic equipment without very high quality surge protection.
irregardless where you live, operating my precious Macs without an UPS for each is unthinkable for me. surge protectors, IMHO, don't cut it ! it ought to be a UPS. heck, even my TC has one although just a simple one. my desktop Macs each have a UPS with a USB port so the UPS can send a shutdown command to the Mac in case of an emergency. my MBP has a built-in UPS, obviously.
so, everyone reading this: do yourself a favor and get a decent [_*Uninterruptible power supply (UPS)*|http://en.wikipedia.org/wiki/Uninterruptible_powersupply] such as [this|http://www.google.com/products/catalog?client=safari&q=apc+ups&oe=UTF-8&cid=118 8217317658000104&os=tech-specs].
Also, will these function on a circuit with ground-fault interruptors installed?
if power to the units is interrupted, they won't work. once power is restored, the will work again. again, if you connect everything to UPS systems, you will @ least have your local network running, even if the connection to the internet is interrupted.
JGG

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Chris CA wrote:
iPads have no tethering abilities either.
I know, but I still don't know what the OP was asking.

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