Sony Bravia makes a high pitched noise when changing from SD channels to HD channels

[iasonsofos]

Hi, I just got a new Sony Bravia TV and I noticed that every time I change from a SD channel to a HD channel the TV makes a very short high pitched noise. The sound is a bit like a dog whistle but very sharp and high pitched. 

Can anyone help solve this please. 

[Sean_Mc]

Hi there,

Welcome to the Sony Community.

So I can try to help, could you let us know the full model number of your TV?

Best wishes,

Sean Mc