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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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iMac G4 (round base) screen not working at all, can I fix it?

Our iMac G4's screen has gone black, no illumination at all. It has been our entertainment center since we upgraded to MacBook Pro a year ago. It has very little information aside from iTunes music collection. Such a great unit to watch DVDs and hook up to our sound system!

Help! Is there any way to get it working again?

Willing to tinker,


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Hi Tina,

It is hard to know where to start without more information.

Does the on/off button light up? If it does, then it is probably a bad lamp in the monitor/screen.

If the power light does not come on, it is a power/power supply/on-off circuit issue.

Please add a comment to let me know what happens.



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Hook it up to your MacBook via a firewire cable. Boot into Target Mode by holding the "T" key down on the iMac. The hard drive icon should come up on the MacBook. Go to Applications - Utilities - Disk Utility and see if you can repair the disk. Get back to us with the results and wecan go from there. If the hard drive is OK, hook it up to an external monitor to isolate the problem. Also take a flashlight and hold it at an anglr to the screen and see if you can see the desktop.

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Tina zal eeuwig dankbaar zijn.

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