I'm guessing this is a known problem as my old T Sport did this too, I'm getting horizontal lines across the computer display of my 51 plate S3. Sometimes these are not that bad, infact sometimes there are none at all, whilst other times there may be as many as 20 or 30 horizontal lines across the display. I think it is worse when there is moisture about, but I dunno, I might just be imagining that. Usually on a long journey they screen will be fine by the end of it. Is there a way to fix this?