Solve : summat has died ??

1.	Solve : summat has died ??
Answer» help... when i turn on my PC it instantly stops iv took the SIDE off and watched the cpu FAN it has a burst of life for less than a sec then stops the little YELLOW lite on the MOBO stays on i have to turn power off at the plug to make the little yellow light go out then when i turn it back on it will do the power burst again and the light stays on i havnt got any spare parts to try n suss it out

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