why did you trade the hard drive? what was wrong with the original drive? did you have a black screen before you changed the drive?
Please give all details?
I changed the hardware because i wanted to use the removed HDD for extra storage purposes on my main desktop. It was working fine. No black screen, just fine.
By the way, the problem has almost been fixed. After realising my optical drive was faulty, i changed it and used this sitehttp://pcworld.about.net/magazine/2109p156id111652.htm