I have the same problem with a Samsung Plasma. It is definitely picking up interference through the tonearm wire. A huge amount of radiation come from the plasma screen, I was wondering if an LED TV would have similar problems? For half the price of a cable, could get an LED TV!! The other thought was to place a metal shield curving around the back of the TT earthed, to shield the tonearm?
Hum from Plasma TV
My Plasma Tv is causing humi in my TT when its turned on. Sometimes I watch TV when listening to my TT . Other than keeping it off or moving everything can anyone suggest anything