Do you have any other computers around to test the monitor? Laptop, desktop, etc. Just to verify that it works.
Though, if your stick of RAM is faulty, you won't get a display. One stick of RAM is fine. People recommend dual channel because of the performance boost.
I -have- actually tested it with my laptop- the display and both cables work just fine. As for setting the default display type in BIOS, I can't exactly do that AFAIK without having a display to read the bios screen with. It doesn't seem to want to read the monitor at all- it just says 'no signal'. All of the parts are new- I unboxed and began to build it just last night. It would be infuriating if the RAM shipped faulty.
EDIT: and thanks, but it's "she". I'm a ladygeek.