I realize this is probably covered somewhere else on here but I can't seem to find it tonight and I've tried for a while to find a solution! Everything works great until I have an all black screen or the raspberry pi is off- then I hear a loud hum or buzz coming from my 30A PSU. I'm sure it's a wiring/ground issue but I'm not sure how to solve it correctly. Below is my wiring setup: RasPi and HDMI converter are on separate 5v power that run up to TV in the 4 pin cables Up at TV is my PSU powering each side of the strip and meets this 4 pin cable at the start where everything finds itself. Any help?