IMac. Ppc g5 will not boot up past apple sign

Question

I have the iMac G5 PPC with 10.5.8 leopard running it. I go to turn it on and I get to the apple sign and the cog wheel and the fan kicks into hyper drive and that's it! What do I do?

Answer 1

Have you tried booting from your install disc?  Try that and then use
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.
You can also try booting with the option key held down, or boot holding the s key to boot into single use mode..  Last but not least, try booting into safe mode by holding down the shift key at  startup.