Shutting Off Premature

[inverted]

Hello, I am having a problem I have never experienced before.
When I start the puter it runs through the bios and then shuts off automatically. I have made it to the install screen with my windows rom and then it shut down again. I have check jumper settings and rechecked jumper settings with no joy. I have checked the power supply and it is working fine. I also went into Cmos and set it to optimal performance and saved and exited and it rebooted and then shut down again. Any help would be greatly appreciated.
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The system specs are:
Amd 1.4 ghz-K7AMA Mobo
256 DDR Ram
325 Watt PS
40g Hard Drive
64mb Geforce Vid Card

[ski]

Make sure all connections are secure, and all cards and the memory are securely inserted.
If they're ok, then try starting in Safe mode. If it starts in Safe mode, then there's a possible software/driver problem. This can be solved by doing a clean boot. If it does not start in Safe mode, then suspect a hardware problem, which is solved either by testing or swapping out components.
Also, the power supply module seems undersized for your system's components. Has the system ever run ok?