I realize that no audio in one ear is a common problem, but bear with me.
I already tried to see if it’s the audio jack that is causing it and did all the common fixes, but no luck.
Then I took apart the left side to try and see if it it was a wiring issue; yes and no. So the wire to the SP- on the PCB was not even connected, but upon soldering the wire to the pad, there was still no sound.
I did a continuity test with my multimeter to see if a wire broke and I actually got a crackling noise coming out of the left ear, so I guess that’s not the issue.
So now I’m stuck at this step and have no idea what to do (short of ripping apart all the wiring).
Image of left ear PCB: https://i.imgur.com/l5NMG2x.jpg