took all day but I managed to mount my power bars on the wall a few FEET away from everything else, everything is zip tied and neat and AC separated from DC. it's quiet again! but I still can't figure what happened…. I did not hear this noise before getting my H9. had to have been there tho. but whatever! I'm happy! ecstatic really, I was several hours into this project and felt I was wasting time. my ears did a double take tho when I powered up 🙂
That's awesome! We're glad to hear that you got this problem sorted out.