Sennheiser HD 518 only playing through left ear?

[Paragrine]

Hi, so for a mystery reason my sennheiser hd 518 headphones are only playing out of one ear, the left one. It started when i slid the right ear cup in all the way so I was only wearing the left one and the right was on top of my head. But when I pulled the right cup out it wasn't producing any sound. I've checked windows settings and drivers and all that and I have no idea what to do next. I am using a Steinberg UR22 interface for it and I haven't turned any of the knobs on that so I'm out of ideas. Any suggestions to try before I start saving for a new pair?

 

[Calvin7]

Cable for HD518
http/www.fullcompass.com/prod/236303-Sennheiser-542192?utm_source=googleps&utm_medium=shopping&utm_campaign=googleps&st-t=googleshopping-parts&vt-k=&vt-mt=&vt-pti=236303&gclid=CKaJqPi55tECFRFMDQod-EMCaA