I'd look for hardware problems. Your post writes the screen is black at start and never turns on. Fix that before thinking it's a Windows issue.
Also, some machines won't start with USB devices plugged in. Be sure nothing is plugged in there.
I did a complete install of XP on my old Compaq and formatted the partition so it would fit- It installed completely without a problem and then at the last restart my screen went black at start up- It beeps once loudly at startup and my screen light goes orange without ever turning on.