The colour on our tv keeps changing. Everyone has a blue or green face and the rest of the picture is shaded as well, then it changes to normal. Don't know what to do. Just have to put up with it I suppose.
Are watching programmes directly received by the TV or are they provided by some sort of set-top box? (e.g. Sky, Virgin Media, Now TV, YouView, etc). If you're getting them from an external device, check that the cable connecting the box to your TV is properly plugged in. (Dodgy colours can be a symptom of an ill-fitting lead)