Q: Wifi won't turn on since upgrade to Lion
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Apr 8, 2012 3:28 PMby petermac87,If it was faulty right through two systems then it was faulty to begin with and you should have taken it straight back for exchange or repair instead of passing a faulty machine off to someone else. No computer magically repairs itself, the problem gets worse if not addressed.
If you don't have a Mac why post here?
Pete
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Apr 9, 2012 2:41 AMby wasteofspace,I finally made it to a genius bar. Having reviewed the history and reflecting on the fact that the logic board is the only bit of kit that hasn't been changed they have elected to change that on the nvidea ticket (mine is a lap top with the duff nvidea chip) as it seems likely the wifi card drop out is connected to that. All very helpful as ever, and I pick it up tomorrow. Fingers crossed.
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May 9, 2012 12:16 PMby Velireon,Hi wasteofspace ... did your new video card fix the issue?
Like everyone else on this thread, I have a late '08 MBP. When I upgrade from Leopard to Snow Leopard, my AirPort card stopped working -- but only when something (monitor) was connected to the DisplayPort. After hours with Apple engineers, a subsequent release of SL fixed the issue.
I've only just now upgraded to Lion, and now the issue is back. I wonder how many folks in this thread were using external monitors through the DisplayPort without realizing that was the issue...
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May 20, 2012 12:35 AMby jibguy,Here's what worked for me....
1) open System Preferences
2) open network preferences
3) turn off show wifi status in the menu bar
4) remove wifi from the network source menu (highlight wifi & click "-" at the bottom of the menu)
5) remove external power & battery and reset SMC by holding power button for 5 seconds
6) replace battery & external power then restart
7) open system preferences
8) open Network preferences
9) add wifi to the source menu (click "+" at the bottom of the menu and add wifi)
10) turn wifi on....TaDah (hopefully)
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May 24, 2012 9:50 AMby wasteofspace,Hi. Sorry about the delay in posting a response. I was waiting to see if the fix worked......it does.
I have to say that frustrating as the problem was it, Apple couldn't have done more to help and in particular replacing my lap top Johnny Cash style. I.e. 'one piece at a time'
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Jun 9, 2012 6:10 AMby Nathan Jackson,Hi - I just got the logic board replaced by Apple on my late 2008 MBP 17". Since then I've started having the following WiFi issue:
At first everything works fine, it connects to my network and internet is perfect. Then after maybe 45 minutes (can be longer) the connection will die - can no longer load web pages. In the status bar the wifi is still strong, and if I click on it then it shows still connected to the network. So then I try turning it off and on again, and it turns off but won't turn on again. I open it in Network prefs, it shows WiFi off and pushing on won't change anything.
This can be solved by a restart, which gives me internet again for another 45 mins then same problem.
Thinking that the new wifi card (which is on the logic board, right?) might be missing a firmware update, I went back to Lion 10.7.1 (I was on 10.7.4), and then did a combined Mac OS update through software update. I have also tried the solution proposed by jibguy above.
