Ok, I have a question for you all. I have my Nikon D40 in Manual, no flash. I reset it to factory and the top left says 1600 (IDK what that is maybe ISO, but my ISO i set at 200, so I am confused) The other settings are F11 the +/- os 0.0 and then on the bottom right it says 623. I am really sorry I dont know what all this means yet. Anyways, the problem is when I take a picture nothing shows up, the picture is black. When I turn the flash on, I get a picture fine. Even when I am in a well lit room. Please can someone help me?