My right earpiece stopped working, no more sound

I have a Sennheiser pxc 550.

I wanted to use it, and realised one of the ear pieces wasn't making sounds. It's the right ear piece. I never connected it trough bluetooth to my laptop, so I was using the wire (the one that came with the headset) The wire goes in the right ear piece, if that matters.

I tried turning the headphones on and off. I connected the headphones trough bluetooth with my phone, still no sound from the right ear. I tried to reset my headphones next, witch didn't work either. I tested with another headphone both my laptop and phone, those work fine.

Does anyone know how to fix this?