I did complain to the cable provider, and they only offered to change the box, I did (I had to drive all the way there) and no changes. Needless to say, I localized the hum coming from the cable box, through the TV set. I even posted it here with many good suggestions. I felt good I could solve the problem with what I had at that time (PF60) rather than buying something else, by simply running the cable through PF60 - and I mean the coaxial cable, NOT the power cord.
One more thing: I moved to my new condo last August, and took the cable box with me. I run directly to the TV, without any hookup to PF60, and guess what?! No hum!! I guess it was comething with cable wiring at that old building.
