Worked well for 1 week.  Now hangs before XP boots.  

motherboard........MSI K8N Neo4
Bios.......................PHEONIX D686
chipset..................nVidea nForce4 Ultra\Standard
cpu........................AMD64  3000 90MM
memory.................Patriot 2x512mb pc3200 400mhz DDR
video......................Leadtek PCIE  with nVidea Geforce
                                                     6600 chip & 256MB ram

After hanging for a hour at the black & white screen, with neither mouse or keyboard influencing it, the computer suddenly finished booting XP.  It then booted 3 times in a row.  I then added a second EIDE hard drive configured as a slave.  The drive was set up correctly by CMOS auto detect.  But, once again the computer is hanging on the same screen.  ALTHOUGH I notice that this time the line "Verifying DMI Pool Data ........" lacks "successful" after the dots.  But it's still hanging at the next line "Boot from CD:" with a flashing curser.  Ideas?  ThanksI found the solution to my problem.  It was a faulty EIDE cable.or not contected properly?.........like the red-stripe on the ide-cable go to next to the red power lead for the drive..i would check the gaphics card........has not become unseated..or loose.