My Sonos Beam (attached to my Philips 55OLED803 via HDMI) had been randomly making screeching beeps (very short and randomly occurring). During one 50min Netflix episode it has been occurring some 20-30 times. So you can imagine this is very annoying.
While googling it seems to be related to Alexa, but the Alexa service (nor the google one for that matter) isn't activated because it hasn't been available here in the Netherlands.
We just bought it past Friday.
We haven't loaded any programs on the TV, we only watch Netflix/youtube/digital tv via a media box on it.
Edit: it's not when changing the channel and it's not as loud and long as here: http://youtu.be/6ZzoKlgkx74
Edit2: Diagnostic report 363072178