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new2mac1971 Author

Level 1

0 points

G5 2.0 Ghz Dual will not boot

Hello all. I'm trying this as a last resort. I'm new to Mac, but a fairly proficient user/troubleshooter of Pcs. I've read hours of forrum posts on the subject of troubleshooting a grey screen/won't boot issue, but everything I've tried hasn't worked. I'm hoping you can help.
The problem is, this Power Mac G5 2.0 dual starts up, chimes, goes to a grey screen with the Apple logo and stops. No spinning wheel, nothing. I've tried Option + boot, it gives me the option to boot from different drives, including the OS install disk, biut when I select any of these, I get the same grey screen.
I have reinstalled the OS numerous times on different hard drives, swapping them out to see if that was the problem, but no change. I have the G5 connected to a different Power Mac G4 via firewire target mode. Using this I've repaired permissions, repaired disks, reformatted and re-partitioned 4 different hard drives, but same thing, it won't boot.
Currently the G5 is started in target mode, and I have the G4 booted from the G5's startup disk. The G4 is running fine from the G5's disk.
I also wanted to try the Apple Hardware Test, but unfortunately, I do not have the original disks that came with this Mac.
Any help and/or suggestions would be greatly appreciated.

Power Mac G5 2.0 Ghz Dual, Mac OS X (10.4.11)

Posted on Aug 8, 2010 10:14 AM

48 replies

BDAqua

Level 10

239,711 points

Aug 15, 2010 7:38 PM in response to new2mac1971

ok, do you want me to start the G5, let it come to the grey screen, then shut down and restart in target mode?

Yes, then on the G5's Target drive goto...

/private/var/log/

Aug 16, 2010 1:48 AM in response to BDAqua

Hi BDAque,

I have the same problem with new2mac1971. But my is worst. After I startup it only show the apple screen... Nothing happen. Do you have any other method that I can help me to reboot the system? Is this a hardware problem or a software problem?

BDAqua

Level 10

239,711 points

Aug 16, 2010 11:04 AM in response to Rebecca Lee1

Hi Boot up, and a warm welcome to the forum! 🙂

Is this a hardware problem or a software problem?

Tough to tell at this point.

Does it Safe Boot from the HD, (holding Shift key down at bootup)?

Does it boot off the Install Disc?

"Try Disk Utility

1. Insert the Mac OS X Install disc, 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. Select your Mac OS X volume.
5. Click Repair. Disk Utility checks and repairs the disk."

http://docs.info.apple.com/article.html?artnum=106214

Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.

(Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)

If perchance you can't find your install Disc, at least try it from the Safe Boot part onward.

G5 2.0 Ghz Dual will not boot