2.26 or 2.4 GHz / White plastic unibody enclosure

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MacBook wifi card not found after new osx installed

since i instaled lion on my macbook unibody white, my wifi card was not working. it doesn show up anywhere. like it was removed from my macbook.

it doesnt show up in network prefs. when i click plus to try to add it, it is not in the list. HELP

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Could you boot with the ibook with another volume with valid OS and check if your wifi card is available ?

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i wil try to bot from external hd with another os, but i doubt it will help because, i installed several other os versions, and there is no wifi hardware foun. currently 10.8.4 is installed

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So the OS seems to have nothing to do with finding the wifi card.

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seems so. it came with 10.6. after i instaled 10.7 wifi was missing and did not worked. i reinstaled the 10.6, but nothing. now i have 10.8.4 as i said earlier...

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Have you or someone opened the system up? Or, have you banged (dropped) or gotten the system wet some how?

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At this point I think you'll need to open the system up to inspect things and try reseating the card.

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The problem was triggered by a software event!

I do not believe that software events can destroy the WIFI hardware. Especially because bluetooth is working just fine. Could have maybe some firmware been damaged? Does WIFI have it's firmware or something like that?

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As I said below, I already opened it up, removed the wifi bluetooth card and assembled it back. But nothing.

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Ok, how do you do that?

How do i open the system and restart the card?

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Here's the iFixIt guide to opening your system and replacing your AirPort board. Take the board out and clean the contacts and re-install it. If it still won't work you may have a bad board.

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Sorry, I didn't fully understand the phrase "open up the system", you meant opening the notebook (hardware) it self.

I disassembled it few days ago, actually it was on the day I posted the question.

I've removed the wifi/bluetooth card. I thought to buy a new one, and that's how I found this site. I reassembled it back together hoping that something would change, but nothing!

Two things that are very interesting about the problem are:

1) Bluetooth works just fine, even though the card is WIFI/Bluetooth combo unit, so any hardware malfunction would probably affect both WIFI and Bluetooth.

2) The WIFI "hardware disappearance" was triggered by installing 10.7. so it means that it was duo to some software thing that happened. I just can not imagine how could a software "event" damage the hardware it self, especially in this case.

It couldn't of fried due to higher voltage? I doubt that the Bluetooth and WIFI chips are programable ? And if they are, could this "event" damage there firmware or something?

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