Originally known as "The New iMac" the iMac G4 was created to replace the iMac G3 as Apple's all-in-one desktop computer. The G4 is easily recognizable by its swiveling monitor mounted above the hemispherical computer. Steve Jobs quoted it as being "a design that will last till the next decade."

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Won't boot up - shows Apple logo and 'busy' circle only?

Cannot open computer - screen lights on power-up, but only displays Apple logo and rotating busy signal and stays locked on that - it does not get to the blue screen system upload or password pages

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Your system may be corrupted or your hard drive failing.

Try starting up from your system installation disk. Insert the disk and restart holding down the "C" key. Go to the second page pull down menu to Utilities, Disk Utility and see if you can repair your hard drive.

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andy parker will be eternally grateful.
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