my PowerMac G5 wont boot, power suply or graphics card? When i press the power button is the chime and then after a while (fem minutes) the fans start revving up, all with a black screen........
PowerMac, Mac OS X (10.5.8)
How is the lunar LED working during this time. Steady on or blinking?
If it is the power supply, you probably wouldn't be getting the fans coming up.
If it's just the video card, then the system can often load and initialize and the fans wouldn't come up.
How old is the PRAM backup battery?
Which specific machine are we talking about?
Was anything odd going on before the current failure?
The machine is a pci-x powermac G5 dual 2ghz, as far as I know everything is original, excluding hard drive.
this problem first appeared when i turned it on, left, came back and it was in vacuum cleaned mode,stuck on loading screen. so i turned it off turned it on, started loading then black.... if the "lunar led" is the led on the front then its steady and that's the only light on....
See if it will come up into Open Firmware and let you do an NVRAM reset.
Hold the cmd-option-O-F key combination when powering. If the screen actually comes up, you should see a light background with black letters. To do the resed, enter the following three commands.
reset-nvram <enter>
set-defaults <enter>
reset-all <enter>
I don't have a lot of hope, in one sense, but it you get the OF terminal screen, then that says at least that at its basic guts, the machine is sort of working, and we can go from there. And, if it does make it into OF, the resets might actually clear things up.
Nothing. I don't think the keyboard is even working...
How to reset the SMU/PMU on a Power Mac G5 (Late 2004) or Power Mac G5 (Late 2005) ...
http://support.apple.com/kb/HT1436
Earlier G3, G4, G5 models...
Still not working............... Not good...
Do you have another Keyboard to try?
Might try disconnecting the Hard Drive & Optical drive to see if any startup key combos work...
like N, T, CMD+s, CMD+Option+p+r, CMD +v, Option, etc.
Hi Teh,
Did you end up diagnosing this issue?
I've got the exact same thing with my 2003 G5 Power PC
Cheers
powermac G5 wont boot. Please help!!!
