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My ibm mother board refuse to come up but d fan spin very fast

\015 My cpu when connected, the fan comes on immediately spinning very fast without pressing the power button. when the power button is pressed the light indicator dont come up, but u can see the light indicator on the optical drive blicking. You can open the drive but the sytem does not come up. i have tried changing the power pack, processor, switch and it did not work.\015

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Replace then.
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