Just tried to give some advise on this question and found it locked.

http://www.regvac.com/forum/b-othercomputerproblems/m-1202833968/

I just recently had the exact same problem and it turned out to be a bad memory stick not the power supply.

   There are two general sections to this discussion board: Your Input and Answers.  Anything in the Answers section cannot be answered.  They all start out here in the Questions section where they can be answered but after they have been answered and/or after six or more months, I move them to the Answers section.
   You can put your answer here as you want it to appear there and give the URL (as you did above) stating that you want to answer that thread and I will move it to there (and delete the URL part) if your post has merit.

Cool, thanks.