How to get HP pavilion to recognize video card.?

The on-board vga connector broke away from motherboard. Tried to bypass to video card but comp. doesn't recognise new card. Cant get into bios or anything without a screen. Is there a way to disarm on-board vga with jumpers? The board is an asus m2n68-la. The vga is a nVidia GeForce 6150se|||Onboard VGA connector broke away from the motherboard? That connector is required to complete a circuit path in your motherboard. I hate to say it, but you need a new motherboard.