I just installed a P5NSLI ASUS motherboard. This motherboard replaces an older P5ND2-SLI. The new mother board has been installed. Upon first boot up I was able to enter BIOS. I made the appropriate changes such as boot priority (CD-ROM, hard drive, and floppy drive) and set the date and time. I saved and exited BIOS. After re-booting, the system will not boot up and will not even allow me to enter BIOS. I have attempted to re-set CMOS by removing the CMOS battery and it still will not boot up or allow me to enter BIOS. Any suggestions??