G5 Power Mac will not turn on.

I have a G5 dual 1.8, one of the earlier models, and I'm guessing the ram restart thing will not work on it. I was just using Safari, and the computer completely shut down, since then, I have not been able to turn it back on, I've tried using a different power cord, and I'm wondering if replacing the power supply will be my best bet.
Message was edited by: Brian Hoisington

Hi, and a Warm Welcome to Apple Discussions and the Power Mac G5 Forum!
Well - if you have checked that the mains power right up to the G5 is definitely good (and have waggled the plug in the socket at the back of the G5, for good luck) - you could try resetting the PMU/SMU
http://docs.info.apple.com/article.html?artnum=300341
but, if you do not get a 'relay-click' from the PSU, low-down at the back of the G5, when you first connect the mains power, it probably won't help.
There is a rather gloomy symptom chart (at page 104 in Preview) here - and also instructions.
If you wish to take a gamble on it being the PSU that's the cause, they may be available here
http://www.dvwarehouse.com/G5-Power-Supply-c-253247541.html&pltid=723fda346ab59730cfb5d40ab2fecc68
http://www.mac-pro.com/Mac-Pro-Online-Store/PowerMacs-Intel-MacPro-Towers
http://www.welovemacs.com/g5serviceparts.html
and elsewhere.
Please post again if you have any questions. Good Luck.

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