When I am connecting my MacBookPro via 3 cinch jackets with my MX4200 (to listen music over my BeoLab3), I have always a visual noise at the TV Tube (I dont have this, if i use my iPOD). If i only use the white and yellow audio cinch jackets, i have a horrible humming at all boxes, so i had to use all three cinch jackets.
Any idea what i can do against the visual noise or the humming ?