right channel missing on left deck

Hey Guys,

I just played around with Traktor Scratch Pro a bit on my Macbook Pro..

Suddenly as I switched to Phono and played a Record and tried to switch back.. it's saying "right channel" missing on the left deck and it's giveing me a vertical line to it..
I tried to switch the whole thing back to Phono and the Phono Channel seems to only be in Mono then and I hear a big grounding noise even if both grounding wires are connected..

I tried a new multicore cable with no luck.
Sometimes the Problem doesn''t show up at all and sometimes it's after five minutes of playing.. when having the problem the green light on the inputs doesn't really come through..

The Yellow Bar next to the Scope Window seems to go down extremely (don't know what this thing is about).. just curious if there is a problem with maybe the Audio 8 but I need to check both cables on both turntables to be sure..

any ideas?

 

try to reproduce the issue without having a normal record in between.
sometimes, playing a normal vinyl can eff up the calibration.

if you used normal vinyl and you got the issue again: try recalibrating the timecode record with the rst button... does that help? if not, does restarting traktor help?