Released in 2003, the iBook G4 replaced the iBook G3 as Apple's portable consumer computer.

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Won't start up, fan goes to high and won't shut down.

when power button is pushed fan starts up on high and stays on Display comes on but stays black. Battery needs to be removed to shut down. TY for any hints.

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Resetting your Mac's PRAM and NVRAM, here's how to:

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Cmos probably needs to be reset. Does it play the Mac startup sound after you press the power button?

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nichalh will be eternally grateful.
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