I trying to connect my Wii via a 3-cord AV Composite cable. The R/W/Y cords are all correctly connected to the converter which I have plugged in to the AV input in the tv (just as I previously had on my Samsung Smart TV). My Roku TV says “no signal (is it on?) and there is a buzzing sound. In the background I can hear the Wii music playing. Any ideas on why it won’t recognize the signal and is buzzing even though the Wii is clearly working in the background?