Darkoracle

I have a similar issue in that when viewing pictures via the computer or viewing the recorded files there is a sort of phasing rather like camera 'hunting'. It alternately goes slightly out of focus and then back into sharp focus on a second by second cycle. When viewed live on the TV there is no such phasing and the picture is rock solid and sharp. However when I view the recorded files through the TV, the phasing is again apparent. Any ideas?