I’m having two inputs to my android tv, one is an security camera’s NVR input through hdmi and the other one is the set top box through AV cables( cannot use hdmi cable for this connection as the home theatre system goes out of sync from CEC). Now I get a huge interference in AV Input because of my nvr input. I have tried separating the AV cables and checked, but of no use. I have tried connecting other input sources as well but only my NVR causes this interference. How do I solve this? What is causing this issue?