PLX-1000 only playing through one speaker.

Hello, 

I have had my PLX-1000 roughly 1 year now and have been having some issues with the sound as of recent.

Basically, the problem is the right output phono line (white) on one turntable. Currently it is working for phono (not always though) and not working when sending signals to Traktor Scratch only sound comes out the left speaker.

Sometimes when using phono and mixing vinyl the sound only comes out of one speaker, or very low sound and quality out of the right speaker.

I have tried swapping cartridges and lead etc but it seems to be an issue with one particular turntable. 

Do you know if there is an easy fix and if not what is my best option? 

Kind regards

Harry