We have 55 inch Smart HDTV (Model UN55D7000LFX2A) and every time we turn on the TV, it makes crackling/popping sound and it last like 15 minutes and it intermittent then disappear. Again, when turn off the TV but doesn't last that long.
Currently, we have Cable Box (Cox), Samsung Sound Bar, Samsung DVD player and Wii attached to it.
It's very annoying! Can someone tell us how to get rid of the crackling/popping sound?