My tv sound disappears for about a second or so roughly every 20 minutes. My tivo v6 is connected via hdmi to an lg smart tv. Wjen watching netflix or amazon prime through smart tv app there is no sound issue. Only happens when watching tv via the tivo. Happens on all tv channels through the tivo box. Online fault checking when running tests dosen't find an issue. I think i need an engineer to come and take a look but trying to get one via the phone number is impossible as i'm kept waiting in a queue for ever. Is there any other way to book an engineer to come and take a look?