I've custom built a home theater PC and on initial startup, it does not POST and give the verbal message "System failed CPU test and CPU not installed". I'm trying to contact the motherboard manufacturer (ASUS) to get their input, but wonder if anyone here has had a similar experience. I've disassembled and reinstalled the CPU with no improvement. The ASUS website confirms that all BIOS levels for this MB support my P4 3.2 GHz Northwood CPU. What else can I try? If it is a bad MB or CPU, any simple tests to confirm one or the other?