OS 10.3 - WON'T start-up under ANY circumstances!

blankenship · blankenship #1 (**permalink**)

09-06-2007, 02:14 PM

so, i've got a dual processor G4, and have been running OS 10.3.9 with absolutely NO problems, until i went to install OS 10.4.7 this morning.
i inserted the install disc and followed the command to restart to begin installation. when starting back up, there was a "kernel" message (?) overwriting the screen, but i couldn't read any of it because there was also a box telling me to restart the computer.

i've tried to restart now in EVERY way i can think of:
i've removed all my extra cards and devices, and tried to start-up from the CD, and the monitor just sits on a grey screen and won't respond.
i've tried to start-up normally, as well as in "Safe" mode, and it just flashes a grey screen for a moment and then screen goes black.

ANY IDEAS?
please help! i'm scared to death, as i didn't fully back-up before installing!

MacHeadCase · MacHeadCase #2 (**permalink**)

09-06-2007, 05:55 PM

Welcome to Mac-Forums, blankenship.

What you experienced with the kernel message was a kernel panic.

What I would suggest you try first is reset the Cuda chip.

Another thing to try: you could startup in Open Firmware by holding down the Command (or Apple key) + Option + O + F: in the prompt line, type:

reset-nvram

then press the Return key

At the Open Firmware prompt, type:

reset-all

then press Return.

And you could also unplug from the electrical outlet your PowerMac G4 and let it wait for 5 minutes, then plug it back in. This helps drain the capacitors.

See where these take you and report back.

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OS 10.3 - WON'T start-up under ANY circumstances!

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blankenship #1 (permalink)
Member Since: Sep 06, 2007 Posts: 17	09-06-2007, 02:14 PM so, i've got a dual processor G4, and have been running OS 10.3.9 with absolutely NO problems, until i went to install OS 10.4.7 this morning. i inserted the install disc and followed the command to restart to begin installation. when starting back up, there was a "kernel" message (?) overwriting the screen, but i couldn't read any of it because there was also a box telling me to restart the computer. i've tried to restart now in EVERY way i can think of: i've removed all my extra cards and devices, and tried to start-up from the CD, and the monitor just sits on a grey screen and won't respond. i've tried to start-up normally, as well as in "Safe" mode, and it just flashes a grey screen for a moment and then screen goes black. ANY IDEAS? please help! i'm scared to death, as i didn't fully back-up before installing!
	QUOTE Thanks

MacHeadCase #2 (permalink)
Guest Posts: n/a	09-06-2007, 05:55 PM Welcome to Mac-Forums, blankenship. What you experienced with the kernel message was a kernel panic. What I would suggest you try first is reset the Cuda chip. Another thing to try: you could startup in Open Firmware by holding down the Command (or Apple key) + Option + O + F: in the prompt line, type: reset-nvram then press the Return key At the Open Firmware prompt, type: reset-all then press Return. And you could also unplug from the electrical outlet your PowerMac G4 and let it wait for 5 minutes, then plug it back in. This helps drain the capacitors. See where these take you and report back.
	QUOTE Thanks

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