When I load up a movie on my Samsung 4K player there is a worryingly loud, sharp sound after any action has been completed (after the Blu Ray has loaded, once I've pressed play etc.) and it doesn't sound like any normal, healthy booting up noises. I've had this system for about two years now and this has only started recently. It doesn't happen on any other source like Apple TV, or while the Blu Rays are playing, so I'd just like to know if it's fixable or if it's even anything to worry about at all. Thanks!