IMac G5 (EMC1989) will not start

I have read several messages, but just cant seem to find my issue. I try to start and the computer (G5 Imac (EMC 1989) gets stuck at the gray screen and progress indicator. I have tried... zapping the pram, reset the PMU, repaired the permissions. I have not done an archive and reinstall as I need to back up the data and reformat the HD as per a message I got when I tried to reinstall.
The fan is humming loud and the gray screen just sits there for ever... 15-30 minutes then I give up.
Not sure if the effort is worth this 4 yr old machine, or just time to upgrade.
Thanks for your replies, Nic

Take a look at this Apple support bulletin - http://www.apple.com/au/support/imac/powersupply/repairextension/. While the bulletin focuses on EMC2056, I suspect that Apple may have extended this to other machines as well. I have a 20" iMac with EMC1989 and it died a few months ago. I lugged it into an Apple Store today in Chicago and the guy took the back off, identified a diagnostic light that was blinking, heard the power supply clicking and said that it was a known issue and that he would replace the power supply for free.
It took about 20 minutes and the machine is up and running and is good to go.
So... food for thought. The clicking that you hear may not be the hard drive and could instead be the power supply.
Good luck!

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2007 iMac with OS X ... unknown version
Problem:
Will not boot. Upon pressing power button it attempts to go through startup procedure then grey-screen and error message (You Need to restart your computer. Hold down the power button until it turns off, then press the power button again.)
I have come to understand this is called a "Kernel Panic"
I have been researching this issue all day. I cannot get it to safe boot by pressing the shift key. It does pull a progress bar but ultimately fails and returns to the kernel panic.
I have attempted to start from the CD to attempt utility disk, but I cannot get it to boot from CD. I have held the C key down. I have pressed it repeatedly. I have used it in combination with the alt/control/command keys. All have failed.
If anyone has any idea what might can be done I thank you in advance for your assistance.
~Daniel

You have a hardware issue. Please make an appointment at your local Apple Store or AASP so it can be professionaly diagnosed.

My IMac 24" intel will not start in safe mode.

Did a Shift - Command-V and the black screen showing all the startup steps appeared and it all looked good except: AFL Alart Sockwed cant update and INIT Reboot transmit failed. All else looks good. I have tried this 3 times and never go past that point. Then the screen turns off white like it does when it starts normally before the apple appears and the last time the screen went black.
I have tried starting with just the Shift Key and computer starts up but not in safe mode.
I have tired starting with the OS X disk and the C key and it will not recognize the disk.I used the #1 disk since the instructions are printed on the disk. Did not work so I tried disk 2 and I get a menu to start the OS or tools. If I click on either one the screen goes white and stays that way.
computer starts fine and provides a login window, and then the desktop screen with screen saver pictures in perfect color. As it goes through starting programs it starts the same programs that is had open when the computer originally crashed. Even when I close them, before it locks up again, and I am forced to restart the same programs open up to the same place. Its like the computer is frozen in one location and will not go beyond that point. Eventually the screen turns white and sometimes black and sometimes gray.
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As you probably read everthing was working fine for over an hour so I shut down and put everything back together completely, all monitor screws, aluminum cover and screws and screen cover, unplugged the external monoitor, plugged in external HD's and turned on the computer and guess what the old problem returned. So I unplugged the external HD's and plugged in the external monitor and took the screen cover off and restarted the computer and guess what it is working fine. Doing a disk utility verify first then if no problem I will unplug the external monitor if all is good then I will plug in the external HD's if all is good I will install what I believe is the problem the monitor cover screen.
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what is wrong with this? how can i fix it? please help, thanks!

HI,
*"thank you for your reply. however this did not work."*
Do you mean you couldn't run Disk Utility from your install disk?
*"if i re-install tiger will my documents and music and stuff be lost? will that solve my problem?"*
No one can guarantee it will solve the problem but instead of an erase and install which would erase all your documents and music, try an archive and install instead. For information go here.
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paulfromnyon wrote:
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Hi
It sounds like you are experiencing kernel panic, if you see that grey screen with multi languages. The cause is usually hardware, possibly RAM. Have a look at this link. It may help you.
http://www.thexlab.com/faqs/kernelpanics.html
It mentions Tiger, but I think you could work with that.
I hope you can get things fixed before your mates come around.
Message was edited by: roam

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IMac G5 (EMC1989) will not start

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