I bought a Raspberry Pi 3 model B starter kit with an hdmi cable inside. I wanted to create a smart tv using my LG full hd (I don't remember the model). The problem is that when I use OSMC or LibreELEC the tv starts making strange sounds, even if the sound is 0. It is like an humming.
If I take off hdmi cable the sounds disappear.
Today, for the first time, the same problem occured while using raspbian. I tried changing cable and hdmi port on the tv. My decoder uses hdmi port 3 (of 4) without problems. Have you a solution?