This sounds a bit corkey, but is the packaging protective film removed from the camera lens? Maybe the factory forgot to remove it. You know how so many electronic things have peel-off protection for shipping & handling. Just a thought.
I actually checked that after browsing a similar post on this board (I think). It's a 2007, so unlikely to be from the factory, but I did suspect maybe a bit of masking tape that the dealer may have put up there when cleaning/touch up painting. Sadly to no avail.
I have had a picture in the past - first on the test drive, and then more recently after I unplugged the monitor and replugged it - I got some semblance of a picture, but in really high contrast. I used the menu to adjust the contrast etc, but it was never 100% clear (like in the test drive), and after I turned it off an back on, it had gone again.
I am starting to suspect some sort of electrical fault on the coach - what with the weird code cycling on the refrigerator, the monitor picture "feels" like a short, and a dead Autodrain valve. Have no idea how to confirm any of that however...