Help getting started with Roku devices, including setup, connecting your device to your TV, linking a Roku device to your account at my.roku.com/link, adding channels, subscribing to services, and more.
Roku forum, I have a Roku 3930X that I'm hooking up on a Sony KDL32M3000 TV. I plug it into the HTML port 1 and have used a usb port and wall plug adapter for power. As soon as I change the TV input to HTML 1 I get a distinctive 60 cycle hum. I have tried using HTML 2 but got the same hum.
I have used this device on 2 other tvs(not Sony) and don't get the hum.
To be honest I had kind of assumed 60 Hz hums were a thing of the past using HDMI connections, but maybe I've just been lucky. As I recall, a common first suggested step was to make sure all devices were connected to the same outlet, and preferably even a single power strip.
If the TV happens to be connected to a coax cable (cable TV/antenna) try removing that and see if anything changes. (These connections may give the TV a different ground.)
I would also suggest browsing 60Hz threads in general AV forums since I don’t recall seeing one on this forum before.