Hi,
More often than not, the humming sound on any electronic device is brought about by the AC side of the power supply not only of the device itself but also all other equipment it is attached to. In your particular case, it maybe introduced into the system from:
- (coaxial) cable TV leadin;
- connections of DVD, VCR, game consoles and others;
- electrical noise from lamp dimmers, lights with electronic ballasts, wireless phones.
It is interesting to note, that the noise could be from other appliances plug in the same circuit as the TV, you of course could try plugging it into another outlet or branch. In some instances, you could even try filtered regulators similar to those used by desktop computers.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.
What type of TV are you using? It sounds like an issue involving the bulb or series and/or electronics transmitting the current to that area of the t.v.
Brand and model would be helpful as well!
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