I think you misunderstand. When we say take the MBD out, we dont mean RETURN it, we mean set it up OUT of the case. The reason for this is some cases suck. They use metal and no plastic sheathes. If it runs (like you, I THINK, said earlier in your post) while being out of the case then the problem is that it is touching some metal in the case (probably hooks or screws, yes some MBD's have hooks, there was a post with that here once), then it shorts out. Then you have you problem and a way to solve it. Another thing to check is to make sure things like memory is seated completely. Sometimes you have to give it a scary amount of pressure before it seats properly. This has happened to me once. Had to give it a pretty good amount of pressure to get the clips to lock the memory in place. Same thing with the vid card. A few other things to check are the amount of thermal paste. To much is bad, as well as to little. Also, under the CPU is a small wire looking thing. Make sure it is not just flat, but actually touching the bottom of the CPU as that is the temp measure.
