I just built a new PC with a Biostar M7NCD Pro Motherboard, 256mb RAM, AMD 2600+, Radeon 9200. Everything turns on except nothing comes up on the Monitor except that it gives the "no signal input" "monitor OK". I have used 2 video cards, the 9200 is new, and get the same error message. The system is down to the basics, one Hard Disk drive and floppy drive. Could the MB or CPU have gone bad?