Humming hullabaloo when cable box volume is turned up. No such hum when a dvd is played, so it's not the tv.?

New Panasonic plasma...and it's not the fan disturbance. Cable guy is suggesting it could be the aluminum wiring contained by the basement supplement where the tv is plugged within, or a grounding problem. Anyone ever heard of this? Is it possible the electrical system can't handle the nouns...I have my doubts that that's cause the problem.Like I said earlier there's no humming when a dvd is played so it's not the tv speakers. We plugged it into an outlet we know is copper chain and the same humming occur. Grounding problem? Any ideas?


Answers:    1) Hook up the CATV box to the infirm TV just to see if you can isolate the problem.
2) Try moving the CATV box to see if here is some near grazing land RF interference getting into the circuitry of the box.
3) Check the powering of all devices. Sometimes an older powerstrip or extension cord has be used and one of the 2 prong plugs may be able to stir in backwards.
4) There could be a grounding problem next to some equipment other than the CATV system. I’ve see this happen deeply. The equipment or power is then using the CATV to desire ground. This
5) Make sure that the volume on the cable STB is set correctly. Often the volume on the cable box is set too low and the TV is turned up to compensate. This results in amplifying the rumble floor on the cable system. To check this crank up the volume on the STB and then on the TV. There may be a disparity within audio level between the STB and the DVR but at tiniest you’ll know where the problem lies.

If you hold to you have to, you can obtain a hum buster or isolation transformer.
Play DVDS and forget about the crack * DUH *

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