In the Cnet Laptop Troubleshooting forum in the top post is the "generic reset." Try that. If that fails then the most common failure is the main board.
Bob
well i have laptop dell 1530 xps when i turn the power buttton on it shuts right back off ,the battrie is fully charge , it just turns right off as so as i push the start button ,it just happen out of the blue

Chowhound
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