Check your power supply and make sure that it is compatable with your new motherboard.
Double check the primary 20/24 pin ATX power connector as well as the additional 4/6/8 pin 12volt power connector. Make sure they are firmly seated.
Are you getting any post information from the MoBo on the monitor or nothing at all is being sent to the monitor.
You might want to beg, borrow or steal a plain old pci video card just to make sure you didn't get a new board with a bad video interface out of the box.