Imac G5 having Startup Problems

First of all I like to say I've heard many wonderful things about the imac, but this has not been my experience so far after just purchasing an imac this weekend.
This particular imac has a problem with startup. On the second day of experiencing this mac it would not startup and would freeze at the grey screen with the apple logo and spinning wheel. I also heard intermittent crackling noise coming from the lower left side, by the apple logo. After waiting for about 10 minutes with nothing happening, I turned it off by holding the power button. I proceeded to turn it back on and it booted up fine the second time. Chatted w/apple support and they told me to remove some startup files and empty my cache in the finder library.
The third day(today) my mac booted up fine, but when I went to open up the system preferences I got the color wheel that kept spinning, and the crackling noise again. Had to hold down power button again to shut down. After turning on a second time it seemed to work just fine.
Now I had to return the first Imac I purchased a week earlier because it kept freezing on me since the day I got it (note I did have the wireless keyboard and mouse). Needless to say the mac I have now has wires. I called the store from where I purchased it from and the person on the phone told me it was most likely that my ram was not seated properly when they installed it. Don't they do checks on this before they hand it over to you? Somebody please tell me that macs are better than this, of course I don't know if I'll believe you at this point.
So does anybody have any idea what is going on with my mac.

Sorry, I don't have a solution, but came here with a similar problem - two days ago I took my brand new G5 out of the box and it crashed immediately after the Setup Assistant told me I could "GO" - I got a Restart message, and it's been randomly crashing ever since. The diagnostics show no problems with the hard drive or RAM, or display, or anything! No apparent reason. Now I'm forced to go to Apple Care voice jail...good thing I kept my trusty G3 running, I have separation anxiety, it has been SO GREAT, but running OS8.6, can't go on forever.

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http://www.macmaps.com/backup.html#RECOVER
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Message was edited by: stephenfromdelray beach

So now that's two of us. Hopefully, someone has an answer.

24" iMac having startup issues

I thought I would post here in an effort to try and see if there is anything else I can do before heading to an Apple Store tomorrow. I own a 24" iMac, which I got in the fall 2006. A few weeks ago, this problem first occurred. The computer started up and the chime sounded then it got to a gray screen with an Apple logo and a spinning wheel below it. Then the spinning wheel would freeze. Then the screen would go black. I don't quite remember how I got the computer working again after the first time this happened (probably one of the solutions below), but I did and now the same problem has occurred today and I cannot figure out any way to fix it.
Solutions I have tried today:
1) Unplugged AC adapter and let computer alone for 30 secs and then plugged in and restarted. Nothing changed. Computer froze as describe above.
2) Unplugged all the peripherals and restarted. Nothing changed. Computer froze as describe above.
3) I reset the SMC by removing the SO-DIMM modules and reinstalled them. Nothing changed. Computer froze as describe above.
4) I reset the PRAM and NVRAM by holding command option P R. Nothing changed. Computer froze as describe above.
5) I tried booting from the OSX Install disk. It would not do so. Computer froze as describe above. Computer froze as describe above.
6) I tried starting up holding C and it actually gave me the option of selecting the hard drive. But then it froze as described above.
So far, I plugged in a firewire cable and am using my MacBook to backup files so I can access the computer and its various files via this FireWire Target Mode.
Does anybody have any further suggestions before I take it in to an Apple Store?
24" iMac Mac OS X (10.4.8)

Add me to the list on of startup problems with my 24" iMac. First off the computer seemed to be slowing up and some of my icons were disappearing.....labels were still there but not the icon. Then I tried installing the 10.4.9 upgrade. Big mistake.......it wouldn't completely install even when I used the standalone installation. Kept getting errors and the try again message.
So after all of this, the computer would not boot up from the hard drive or from the install DVD. Fortunately, I have a external startup drive and eventually I was able to get the computer to startup from that drive. From there I was able to startup from the install CD DVD. I tried to repair Disk but it failed because of an error and I am now doing an install and archive while I write this. Keeping my fingers crossed.
This is my second iMac that I have had startup problems. With my last iMac, it was the hard drive......Apple replaced it and the computer works fine.(my wife is now using that computer) It was during my problems then that I learned it is helpful to have an external startup drive. I operated that iMac from the external startup drive a couple of months before I took it in for repair.
Oh boy, the first install DVD just finished and it won't eject and now I have the message "there were errors installing the software" Try again.
Complete frustration...........I will try the installation once more and then probably a clean install if that doesn't work.
iMac G5, G4 Powerbook
iMac G5, G4 Powerbook Mac OS X (10.4.8)
iMac G5, G4 Powerbook
iMac G5, G4 Powerbook
iMac G5, G4 Powerbook

Imac G5 having Startup Problems

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