|How long did you wait at the black screen? And how old is your system?|
I've know older PIII systems running XP that can sometimes take up to 20 minutes at the pre-login screen.
So, it shows the Windows XP (or windows 7, if your auto-specs are correct) splash screen and the little green moving bar, but once that is done there is no login screen?
Also, HDD lights on the front of the system are supposed to be intermittent. They show you that the hard drive is operating and retrieving data. That is good.
And is this a new install or an established system. it is possible on both new and established systems that the video card drivers have failed. But if it doesn't do anything in Safe mode, you could be looking at deeper hard drive issues.
Not everyone can decipher Klingon script...
chay' ta' SoH tlhe' vam Doch Daq