Sky glass high pitched buzzng at set time

[Wardy14]

Why has my sky glass suddenly started  making a high pitched humming noise from 3 in the morning, tv is off but seems to start every morning between 3-4 , wakes me up , tv is connected directly into power socket , not into an extension , it's on wifi , has high quality hdmi's , really starting to annoy me after a week of doing it 

[Mark39]

You mean in standby rather than off at the plug? It sounds like your Glass may have developed a fault. If it's still in warranty you could give Sky a call.