I'v had this problem since the day we bought the system , hum and lines running horizontal . A google search shows a problem called ground loop back .
I tried a suggestion from a video forum calling for a different power cord with the middle ground to be broken off , low and behold problem solved . I used a new computer power cord , I'm a little worried even tho its plugged in to a high end power surge protecter .
Friends say its not safe so has me doubting the advice . I heard that a HDMI cable might solve the problem ? The bloody thing works fine in other rooms with different tv's , I want to use the big screen and 5.1 in the livingroom tho .
Have others tried a different approach ?