I've just brought a Harmony 785 advanced universal remote. Everything works OK, except that the remote makes an irritating high-pitched buzzing noise continuously whenever the screen is on. The only time the noise stops is when the screen switches off or when the remote is rebooting (eg. after updating settings).
The noise isn't loud, but in a quiet room it is loud enough to be audible from with 1m.
Is this noise normal or is the remote faulty?