Chosen Solution
Wifi Issue- When click on WIFI icon its showing “No hardware installed”. Bluetooth- Bluetooth icon is faded and I’m not able to use/connect that also. Please suggest me!!
It sounds like your Airport board needs to be reseated or will need to be replaced. Here’s the guide to get to it and the part info MacBook Air 13" Early 2015 AirPort/Bluetooth Card Replacement FYI - This is the same as your system.
