I was editing videos using Movie Maker on my laptop which is on Window 8.1, when the sound on the left side of my headphones were gone and there was some crackling sound. Sound on the right side of the headphones would play normally. I googled for a fix and came to a Youtube video and while watching, the crackling sound continued on the left side of the headphones.

I followed a guide that mentioned computer management > services and applications > services > windows audio, and then restarting windows audio. The crackling was no longer there but there was no sound coming from the left side of the headphones either.

I have tried the headphones on my phone and the same thing happened. Any idea on how to fix this? Any help is very much appreciated, thanks!