Problem with friend's computer. One day it was normal, next day wouldn't boot. It posts but then presents black screen saying "Searching for Boot Record from IDE-0..not found" and "Searching for Boot Record from Floppy..OK", and a blinking cursor. It won't boot from hdd, it won't boot from a floppy or even try to access it, and it won't boot from a bootable cd. Been in BIOS, everything appears to be set correctly, hdd is recognized. But no matter what boot order is entered, it won't get past the black screen. IDE cables have been reseated as well as completely changed except for floppy - no difference. Hdd replaced with new - no change. System is about 3 years old, AMD Duron 850, MB 810XP K7/ATA100. Has MB failed? Any suggestions appreciated.