Why is the signal light of microphone on the F4 key never lit after pressing it (meaning microphone cannot be switched on and off by pressing it while can be switched via settings) even if the overall performance of microphone is normal on my laptop?
I shall explain it a bit further. On SF314-512, there are two signal lights that are embedded on keys on the keyboard. One is on the Caps Lock and the other is on the microphone key, that is on F4 key. The light on the caps lock works normally and respond to each press on the key with turning on and off accordingly. However, the light on the microphone does not. Given that case, the microphone can be switched on and off normally through settings. I wonder the cause behind it. Someone gives me a clue as to it?