G5 dual 2.7GHz refuses to get past the grey apple logo screen no matter what I do!

Mine did pretty much the same thing a few days ago (I posted a message wondering how you can boot from a CD if the computer wouldn't open the tray).

I tried putting in the original Mac OS X CD to reinstall the software, but the Disk Utility wouldn't allow me to format the drive, saying, "resource is in use", which was weird, because it was from a fresh boot off of the CD.

Anyway, I booted up from my DiskWarrior CD, let it do it's thing, and everything was back to normal. I didn't even have to reinstall the OS. DiskWarrior has saved me time and time again.

Agree, DW can be a life saver. 🙂

I strongly recommend that you only use the specific DiskWarrior version for the OS you have (in your case, for Leopard). Which is version 4.2.

dubtastic wrote:

• 3GB of RAM (2x1GB brand new from crucial)
• stays at the grey apple logo screen and the fans then start revving up excessively

So, was it working before the new RAM? If it was, you should at least try things out with the new RAM pulled back out, if you haven't tried that already.

Do you get the progress "gear" at all in the gray screen? You might try a verbose boot by holding down the cmd-V combination until you get (with any luck) the black Unix terminal screen, which should give you a clue of where it is stalling by what was written to the terminal at the stall point.

Let it cool down, then Get Temperature Monitor to see if it's heat related...

http://www.macupdate.com/info.php/id/12381/temperature-monitor

And/or iStat Pro...

http://www.islayer.com/apps/istatpro/

If you have any temps in the 70°C/160°F range, that's likely it.

Seems strange that it's trying to invoke "AppleIntelCPUPowerManagement" on a G5, but maybe it's all inclusive???

Though it exists on my Universal 10.5.8 Install, it does NOT appear to be a loaded extension....

/System/Library/Extensions/AppleIntelCPUPowerManagement.kext

BDAqua wrote:

Seems strange that it's trying to invoke "AppleIntelCPUPowerManagement" on a G5, but maybe it's all inclusive???

Though it exists on my Universal 10.5.8 Install, it does NOT appear to be a loaded extension....

/System/Library/Extensions/AppleIntelCPUPowerManagement.kext

BD, is that showing up in your PM's extensions folder? I wouldn't expect to see it loaded in a PM, but I wonder why the installer loads it unless the 10.5 installer loads a system that could boot an Intel, too, when it installs on a PM. (I read somewhere this weekend that an Intel will actually boot from an APM formatted disc as well as a GUID formatted disc) Curious.

I recall seeing yesterday or Saturday on one of the discussion threads someone having that extension show up in a verbose boot on a PM that was having problems booting into Leo. I think I advised trashing the kernel caches and touching Extensions in that one, but it is puzzling that it shows up here as well.

This is the other discussion:https://discussions.apple.com/thread/3045726?answerId=15161427022#15161427022

Yes, I have it inmy Extention folder.

>(I read somewhere this weekend that an Intel will actually boot from an APM formatted disc as well as a GUID formatted disc) Curious.

Yes, I boot my Intel iMac from APM all the time, as GUID is only needed to Install or do Firmware updates, yet if anything happens to my GUID internal, all is lost since the rest of my Macs can't read GUID disks.

Put the Install Disc in the other Mac, boot the other Mac into FWTDM, boot this G5 with the Option Key held down, see if the G5 can selct the Install Disc in the other Mac to boot from.