Power Mac G5 pomme grise et ventilateurs à fond

I do not know why the fans are running like crazy nor do I know why you could not boot with your orginal cd.

What did hardware test indicate? How were the fans when you run the hardware test?

Sometimes if volumes don't appear in Startup Manager (what you get when you hold down the Option key at startup), you need to reset the Mac's PRAM, NVRAM, and Open Firmware. Shut down the Mac, then power it up, and before the screen lights up, quickly hold down the Command, Option, P, and R keys, until the Mac has chimed twice more after the powerup chime.

Then, before the screen lights up, hold down Command-Option-O-F until the Open Firmware screen appears. Then enter these lines, pressing Return after each one:

reset-nvram

set-defaults

reset-all

"The reset-all command should restart your Mac. If so, you have successfully reset the Open Firmware settings."

http://support.apple.com/kb/TS1812?viewlocale=en_US

Should the fail...

Try taking the battery out for 10 minutes. Put battery back in. Cross fingers. Power the machine back on.

How to eject a cd from the internal cd drive:

eject cd

List of devices:

devalias

List of variables:

printenv

google translate:

This is a mystery to me.

When you run diagnostics, what does that say? Did you run the memory testing?

You sure you have the correct install disc for your machine?

Did open firmware start up and did commands like

printenv

work?

You could pull out memory sticks and see if it was a memory problem?

Unable to control the memory test option P and R

What do you mean by this?

You could try a linux ppc distribution like Debian or Fedora. At least you could see that the cd booted.

Could try an external firewire drive. Could try target disk mode.

Robert

Hi Vincent, Robert asked for ideas here.

Only thing I can think of is to disconnect the Hard Drive & see if Single User then boots up, or if it can then boot from the Install Disc.