Test this : Gd bless you
Line noise is feeding in from the AC line. Use an ac line filter to block the line noise. RF (radio frequency) interference is being picked up by the power line or wiring. Remove sources of RF interference, such as fluorescent lighting or wireless devices not designed to work with audio/video equipment. Wires between the components are on top of one of the components; the transformers are causing RF interference. Be sure that wiring goes behind the components rather than on top or between components. If there is an equalizer in use, there could be a ground loop. Ground loops can be resolved by installing GLI's (ground loop isolators) on the cables connecting to the equalizer.