My iMac G5 won't continue the start-up process

My iMac G5 won't continue the start-up process, it goes through the gray screen with the Apple to the blue screen after a short while the fans go on and it goes no further.
I'm not sure what to do at this point.

There are a number of things to try:
Disk Utility
1. Insert the Mac OS X Install disc that came with your computer, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
3. Click the First Aid tab.
4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
5. Select your Mac OS X volume.
6. Click Repair. Disk Utility checks and repairs the disk.
Resetting the PRAM
Resetting the SMU
1. Shut down the computer.
2. Unplug the computer's power cord.
3. Press and hold the power button for 5 seconds.
4. Release the power button.
5. Attach the computers power cable.
6. Press the power button to turn on the computer.
It's possible your logic board has failed, you can also run Apple Hardware Test which should be either on your install disc #1 or #2, hold down the D key to run it.
Please post back with results,
Message was edited by: MGW

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