New Roku Express Stick constant high pitched hum/buzz
I’ve bought a new Roku Express stick and gone through all the set up. mad soon as I opened up the Roku player, it started emitting a high pitched whine or buzz through the tv audio, whenever the player is running. This audio drops or is masked when other media is playing but is really apparent whenever the homepage is up. I have plugged the HDMI cable into each of the 3 sockets on the tv and it has made no difference. I’ve seen a few posts with this problem - is it resolvable? I’m really pleased with the stick, which has turned my tv into a smart tv in an instant - but I do t know if I can stand it whining at me non-stop.