Another Wifi Issue - may be slightly different.

[cheesetony]

Hello there.



A few months back I had to take my Mac (27-inch, Mid 2011) into an Apple Store for a graphics related issue. This was fixed, but when i returned home - the mac wouldn't even load the operating system. As I had very little on the system anyway, I decided to do a new installation from a Time Machine back-up.



All worked as it should and I was back up and running. However, I discovered that my Wifi was now not detecting my local network. In fact, it was not detecting any network around me (it would normally detect at least 4 in the vicinity). I have tried several resets, checked my router channel, changed my router channel, removed wifi, reactivated wifi etc etc but still to no avail.

I decided to take my machine downstairs (closer to the router) and it detected the router - albeit, only 1 bar. But still it didn't detect any other network around me.



I am currently wired in next to the router and the wifi is on and connected but showing no bars. My Ipad is connected with full bars, as are several other tablets and phones when tested on the network.



Does anyone have any idea what is going on here?

Could something have been knocked/loosened in the store? Could the airport card be loose?



As a further test, I used my iphone to share my internet connection. The mac detected this when immediately next to the iphone. However, i then took the iphone upstairs and the signal disappeared completely.



I am lost!



Thanks in advance



cheesetony

 

[graley]

Wifi failure

Try reinstalling the system if it is 10.9 or 10.10.
Restart while holding down command R. It will be slow.
Follow instructions.

 

[cruisin]

You should have gone back and had them repair what they broke. My mac was repaired a comically large amount of times and it always worked afterwards (as it should). This sounds like a loose wire as it works in general but you need to be close for any signal.

If the iMac connects to the iPhone to get internet, it will still be using the same bad WiFi internally and have the same problem of losing signal with distance.

If the reinstall fixes anything I will be impressed but it needs to be fresh, not a restore from backup. If you can't get Apple to fix their bad repair you can always buy a USB network adapter and leave it plugged into your iMac, that should fix it.

This link has some steps you can try. The SMC/PRAM reset is important as a reinstall will not affect the SMC/PRAM settings.

Hope it works out for you.

 

[Ipadilac]

sounds like the antenna wire has gotten disconnected.