After OS X Yosemite 10.10.2 update could not find wifi
MacBook Pro, Mac OS X Yosemite 10.10.2
MacBook Pro, Mac OS X Yosemite 10.10.2
Wireless disappearing is not so unusual. With Yosemite.
Clean install Yosemite.. or clean install your old OS.
But within Yosemite I don't know of any easy way to make it turn airport back on.
It seems to not recognise the hardware at all.
Did you reset PRAM.. is that what you mean by hardware reset?
Did you do a hardware diagnostic test?
Reinstall a working OS.. eg whatever you had on it before you "downgraded" to Yosemite.
Or ring apple and get their support to fix it.
Sorry I just don't know of any other way to fix it.
After OS X Yosemite 10.10.2 update could not find wifi