Originally Posted By: davew
Could the hum come from a recently installed light dimmer or nearby fluorescent light? Or do you recall this problem starting after getting a new appliance like a refrigerator?


no new appliances but there have been times when the hum went away and turning on a lamp would make it start.

I'm not so sure the filter would work on the cable line...i unplugged the cable from the cable box so there was no connection and the hum didn't change at all.