Hi PGit,
The first thing to do is simplyfy the setup as much as possible, i.e. only have plugged in what is absolutley essential to get a boot and work up from there.
Remove all cards except for a video card (unless the video is on-board, in which case remove all cards)
You do not even need any drives attached, as you will see the BIOS screen if you can get the machine to start up.
Just have some memory and the processor installed and see what happens. Then work your way up from there.
Good luck
