I have a TRAKTOR KONTROL S8 while using it the left hand side screen went white, all controls still work but now I have no wave form or anything showing, the right hand side is still working as normal. I have tried turning it off and on, but no luck. This has happened right after upgrading to Traktor 4, but I'm not sure if it is related. Is this a hardware issue? Is there anything I can try to fix it?