I installed a K7 motherboard and Duron socket A CPU a few days ago. I powered pc up with a floppy, cdrom ,video card and memory attatched to board. I made to the bios setup and then lost video. CPU fan continues to spin but the board is not powering up long enough to reset defaults in bios. I cleard cmos and attempted to power up again..Same results ,I get video for about 15 seconds tops. What have i done wrong ? I have thermal grease on the processor and heat sink and CPU is in Pin 1 posistion. Could the board or CPU be DOA?