Replaced old ecs mobo with the asus and it proceeds thru standard boot up, including making bios changes to the "insert CD" prompt. When this is done I get a message that its checking hardware. After that -- nothing just a blank screen. CPU "duron" 1.3 GB, 40 GB HDD, @ CD_ROMs, Floppy, 512 MB RAM 1 Stick, And TNT2 AGP card is all that are connected. Can someone help me??