Imac G5 1.8 Grey Screen, Start Up Problem, Any Help Appreciated.

Hello,
I've been having start up issues for about four days. Never had any problems before. Here's what happens:
During start up the start up the usual tone is heard. A grey screen appears and the start up process stops. I am forced to restart and try again. After several attempts the computer start up makes it to the grey apple logo and then the fans max out. I then restart the computer again and it finally starts up. The computer works perfectly once it is finally on all of the way. I have tried the follwing techniques to fix the problem:
Tech Tool Pro: Optimize and Maintenance, program worked fine, fully optimized, but did not fix the start up issue.
Utility Disk from CD: verify disk and permissions, permmisions were corrected, disk repair does not work-error message.
Started in Safe Mode: Checked for extra Login items, none found.
I'm not sure what else I can do. Any help would be greatly appreciated.
Thank you,
Greg Sayles
Imac G5 1.8 Mac OS X (10.3.9)

You say 'disk repair doesn't work - error message'. It's not clear, but have you tried booting up from your Panther install disk and running Disk Utility from there? Perhaps running DiskWarrior might help (if you have it of course). Failing that you may be looking at an Archive & Install to replace your existing OS with a fresh new one while keeping your apps & files intact.

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Imac G5 1.8 Grey Screen, Start Up Problem, Any Help Appreciated.

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