K so recently I've been having some issues with my xbox. I took it to my father's house and plugged it into his tv and it worked great. When I came back home and plugged it in, I noticed that it'll work fine, the cut to black screen and it says no signal. It comes back, only to flick off again. I've tried all the troubleshooting you guys have suggested in a previous thread. I even changed the HDMI, and now the sound doesn't work, even after switching the cables back. I've also noticed a small small ring comes from the xbox when the HDMI cable is plugged in, when it's unplugged, no noise.
TV: Viso model E470VA