I'm building a new machine from some old parts. CYRIX 6x86L 150+, M Tech 549 motherboard. During bootup the system recognizes my CDROM and the Segate ST3850A 850 MB HD but then the screen clears and a "PRESS A KEY TO REBOOT" message appears. The system will not reboot from the keyboard (reset button works). I've tried setting the BIOS to bypass all errors but no change. Same error occurs when I have a bootable floppy inserted. Ideas?