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mac not starting

Posted on 2006-10-19
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Last Modified: 2013-12-27
my dual pro mac G5 gets to the grey/blue screen with the apple logo and rotating circle, but goes no further. recently added more memory,so have taken this out and alternated current memory to no avail. tried safe-boot and verbose boot, still nothing. after a few minutes on this screen the fans all kick in very loudly.. cant open the draw to boot from disc (is there another way apart from the button on keyboard)?....
cheers dan
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Question by:networkfish
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by:strung
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Hold down the mouse button while rebooting. That should open the CD drawer.
Then boot from an OS X install CD by holding down the C key. From the menu of the install CD, run Disk First Aid from Disk Utility.
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by:networkfish
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did as directed.
summary of disc repair:
"keys out of order"
the volume could not be repaired
the underlying task reported failure on exit (-9972)

that sounds bad to me. is therebanything i can try or is it "take to apple time?"
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by:networkfish
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also.if i restore the disc, will that delete any work i have on the mac, or just restore the system software...?
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strung earned 500 total points
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There are two possibilities:

1. You have a hardware problem with your hard drive, or
2. You have a disk directory corruption problem, which is a software problem.

If your OS X CD is at least OS 10.3, you can find out whether the problem is hardware or software by rebooting from the boot CD, opening Disk Utility, and looking to  see what the S.M.A.R.T. drive status is:  http://docs.info.apple.com/article.html?path=DiskUtility/10.5/en/duh1896.html

If the hard drive is failing, then you will want to get as much data from the drive as possible before replacing it. If you have a friend with another Mac, you can use Target Disk Mode to copy the data from your drive. Let us know if you are having hardware problems and we can give  you more details.

If the SMART drive test shows that your hardware is okay, you have two choices to repair the "keys out of order" problem. One is to purchase and run a high powered third party disk repair utility like Disk Warrior or TechTool Pro to try to repair the drive.

The second option is to back up your hard drive using Target Disk Mode, then reformat the drive and copy your data back. Again let us know what option you plan on choosing.

In answer to your last question, restoring the disk will not solve the keys out of order problem unless you completely erase the disk first. The only way to solve the problem without erasing the disk is with Disk Warrior or TechTool Pro.
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