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Helpful answers
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Mar 3, 2012 3:24 PM in response to jamesfromlos molinosby old comm guy,Some questions:
Do you hear the boot tone (chime) as you power up?
Is the white LED steady or flashing above the power button, or is it off?
How old is your PRAM battery? If it hasn't been changed in a while, it probably could use it.
Have you tried a safe boot by holding down the shift key when you power up the machine?
http://support.apple.com/kb/HT1455
Have you tried a PMU/SMU reset?
http://support.apple.com/kb/HT1939
Finally, if you let it sit in the monitor-dark state for about ten minutes after powering, do the fans rev up to full speed?
This may indicate that the video card has tanked if the fans do not rev up.
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Mar 3, 2012 3:42 PM in response to old comm guyby jamesfromlos molinos,I do hear the chime, the white light is flashing, I don't think the PRAM has ever been changed, haven't started in safe mode, and the fans go to full speed after a few minutes. What is a PMU/SMU reset?
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Mar 3, 2012 3:56 PM in response to jamesfromlos molinosby jamesfromlos molinos,Okay, I did the PMU reset, and it didn't help.
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Mar 3, 2012 10:36 PM in response to jamesfromlos molinosby old comm guy,jamesfromlos molinos wrote:
I do hear the chime, the white light is flashing, I don't think the PRAM has ever been changed, haven't started in safe mode, and the fans go to full speed after a few minutes. What is a PMU/SMU reset?
Is it flashing in a rhythmic pattern, as in, say two or three flashes, pause, same number of flashes about five seconds later and continuing?
A power-on self test in the computer’s ROM automatically runs whenever the computer is started up after being fully shut down (the test does not run if the computer is only restarted). If the test detects a problem, the status LED located above the power button on the front of the computer will flash in the following ways:
• 2 Flashes: No RAM is installed or detected.
• 3 Flashes: Incompatible RAM types are installed.
• 4 Flashes: No RAM banks passed memory testing.
One thing to try if any of the three items is true is to reseat the memory DIMMs (remove from the logic board and then reinstall). If the number of flashes is greater than four, though, then you have serious problems beyond the memory.
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Mar 3, 2012 10:46 PM in response to jamesfromlos molinosby BDAqua,If you're sure the RAM is good, try the Hair Dryer trick...
http://discussions.apple.com/message.jspa?messageID=13240047#13240047
https://discussions.apple.com/message/15223603#15223603
https://discussions.apple.com/message/15499912#15499912
https://discussions.apple.com/message/15613068#15613068
https://discussions.apple.com/thread/3270112
https://discussions.apple.com/message/16053892#16053892
No power light at all...
https://discussions.apple.com/thread/3692775?tstart=0
It can show on any G5, and even many other computers & electronic devices of the period.
http://www.macintouch.com/reliability/pmg5.html
http://lowendmac.com/ppc/power-macintosh-g5.html
And see this last one in particular...
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Mar 4, 2012 7:39 AM in response to BDAquaby jamesfromlos molinos,Haven't tried the hair dryer trick, do you take the sticks out, or do you blowdry while they are in there?
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Mar 4, 2012 8:18 AM in response to jamesfromlos molinosby jamesfromlos molinos,Okay, now it is not flashing.
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Mar 4, 2012 12:06 PM in response to jamesfromlos molinosby BDAqua,Most have left the RAM in, but either way could be beneficial.
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Mar 4, 2012 12:07 PM in response to jamesfromlos molinosby BDAqua,Does it sound like it's going further into the boot?
How long did you use the Hair Dryer?