I have an iMac G5. it was running fine but suddenly it froze, so I was forced to hold down the power button until it turned off.
Then when I went to boot it up, it all looked normal and then instead of booting to Mac OS X it froze on a white/gray screen.
My HDD was full when this happened so I wonder if it does not have room to write the files for bootup and crashes?
But when I try and boot the Snow Leopard disk or Lion disk it just does the same. After lots of reading I think I just need to format the HDD but how if I can not boot the from CD to get to Disk Utility?
If anyone could help it would be appreciated.