Q: iMac G5 2Ghz won't do a cold startup off the harddrive, but will boot off of CD and then on a restart.
So this is what my iMac has been doing for the past couple of weeks. When I do a normal startup, the iMac turns on and goes to the gray screen. After a few minutes longer then it's supposed to boot up, the fans in the iMac run at full speed and the iMac won't go any further on the boot. I then have to do a hard shut down (I miss the restart button). I now keep the System Disk in the machine because I then have to start the iMac back up, hold down the C key until the iMac goes through the booting process off the disk. I can usually then quit off the Disk and do a restart. And then usually the iMac will boot normally off the harddrive. Neither Disk Utility nor Disk Warrior 4.1 have found anything wrong when I do the diagnostics. Any ideas? I aleady had the power supply replaced within a couple of weeks of getting the machine, so I'm sure it's not that. Many thanks.
Bill Rudloff
iMac, Mac OS X (10.5.8), G5 20" 2Ghz
Posted on Feb 12, 2012 4:40 PM
