Wow a wealth of information there.
I love posts like this.
Its almost like going in to a shop and saying I want to buy something to a sales person, and them saying what would like to buy Sir "well the thing is I have not got a Clue" So what am I supposed to sell you sir ?
"Take a Guess" anything will do.
"Need a bit more information sir" or I may end up selling you a Toaster you never wanted in the first place. Good point!.
Mental note to explain myself a bit more clearly, and in depth as to exactly what the problem is and what I am looking for.
First of all forgive me for that little dig. In any case one of te most simple things to work out what is wrong with a computer is the bios error beep codes. Obviously if the system is not powering on and shutting down after a second or so the likely culprit first of all to be looking at is the Power supply unit of the system. Take it, test it on another system or use a replacement unit..