WiFi airport network services disabled
I have a macbook air bought in 2014. Last week my friend tried to disconnect the WiFi but she ended up disabled the WiFi interface in the network preference and clicked the "-" button. Hence, no WiFi can be detected. I've tried all of the following with reboots following each approach, but still failed to add WiFi back.
1.clicked "+" button in the network preference but no WiFi interface shows up.(only Bluetooth and thunderbolt bridge are there, as well as pppoe, clan)
2.added a new location in the network preference and deleted the "automated". No WiFi showed up in the "+" menu.
3. Added another administrative user.
4. Formatted and installed osx 10.10.3. Still the same.
5. Reset smc
6. Reset param
7. Kext utility repair
8. Kext utility replaced with a healthy macobook pro io80211family.kext
8. Terminal command: ”ifconfig -a" found en0 inactivated.
9. "Sudo ifconfig en0 up" and "Sudo ifconfig en0 down" and combinations. Nothing happened.
10."networksetup -setairportpower en0 on" or "off". Shows that airport networke services are disabled.
11. " network set up -get airport power en0" shows that it's "off(forced)"
12. Formatted and installed a Linux distro still no WiFi hardware detected.
Is there a way to force enable the airport network services? Thanks in advance.
MacBook Air, Other OS