Hey guys, I have a base aluminum unibody 2.26ghz 13 inch MBP and I just recently purchased a set of Crucial 4GB of ram and a WD 500GB Scorpion Blue. After installation, I would boot up the MBP and wait for it to have icon with the file folder and a question mark flashing. I'll then insert the Mac OS start up disc and wait for it to do its thing...the Apple logo for appear and the clockwise spinning logo appears below it. After waiting for nearly a minute, the screen would go black and stay black for a long period of time, then shut off by itself. I tried repeating this several times and I get the same results. I quickly came to the thought that my computer was fried somehow. I shut off the MBP and switched out the new HD and replaced it with the factory OEM 160GB HD and turned it back on and to my surprise, everything was fine. Could it be the new hard drive that is defective? Or is there a step that I might of missed? Sorry for the long story, just wanted to make sure that I covered the problems that I have been encountering. Thanks in advance.