From what I have searched, the issue is caused by a software update Asus has given (not sure which one). Many people have the same issue. For those who still has warranty got their motherboard replaced. Idk for how long that would work. For the rest ...
I'm having the same issue. WiFi and Hotspot doesn't work now. Is your's fixed? I thought it was hardware issue but now realised it's software problem. Please update on your solution.