I have been working on this problem for a while now. I thought that it was a software problem. I have been working with gringo_pr. The topic is listed here:http://www.bleepingcomputer.com/forums/topic358837.html
He suggested that I post on this page to gain further help.
My computer is a custom built AMD 64 3500+ 2.21 GHz Prossecer, 1 GB Mem, 279 GB Maxtor HD, Windows XP Pro Servise Pack 2. I have 3 fans in total and all seem to be working correctly.
When the computer starts up it will start to load Windows and then just TURNS OFF.
I can restart and F8 in the start up and go into windows w/SAFE MODE, SAFE MODE/NETWORKING, OR / CMD PROMPT.
This takes serveral atemps to start and turn off before I can even get into windows. All in all I have tried to figure this out on my own wi8th little success. I downloaded SLW and it does not register a temp for the MB or the Processor.
It seems that the system overheated and I think that one or more parts were damaged. I opend the computer up and the heat sync was full of dust and debris. After a cleaning the system is still doing the same thing.
I hope that this is gives somone the info to help. Thanks in advance for any help.