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G5 Will Not Power Up
I have a dual 2.5 G5 purchased summer of 2004. It has been working great. I powered it down last night with no problems. Today it will not power up. When I press the power button I can hear the fans and drives start to spin up and then after a split second it shuts off. I tried unplugging it from power for several minutes. I also tried resetting the PMU switch. So far nothing seems to be working. The computer is plugged into an APC Smart UPS 1500 so it’s got plenty of good power and is protected. Any ideas? Thanks!
Bill Carnicelli
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7 Replies
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Try changing the battery, that worked for a friend of mine a few weeks ago on a G5. (Actually she just jiggled the battery and that worked) I had the same problem on a Dual 800 G4 and it was because of a dead battery.
Cheers
John Christie
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Take advantage of the Apple Care plan you purchased with the computer.
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My friend with the same issue called Apple, they’re solution was to take it in to a service depot. The clock battery **should** last longer than a year, but save yourself a trip and try jiggling the battery first.
Cheers
John Christie
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It may be your motherboard has gone bad. Make sure an insanely qualified person looks at your computer at this point and replaces the motherboard if necesary. It can be a very delicate procedure and if it’s not done right you can kiss the whole thing goodbye…except your hard drive which should be fine.
If you have another G5 you should take your harddrive out of the one that’s down and hook it up in the other one. Grab your data ASAP.
Stay calm – you’ll be okay. Good luck!
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[John Christie] “The clock battery **should** last longer than a year”
Technically it should, but I found sometimes if you turn off the battery back up at the end of the day, it tends to drain the clock battery much faster. Also, getting a cheap battery and replacing it is a good place to start rather than to have to haul the whole machine into a service center.
I’d try and change the clock battery first before jumping to the conclusion that the mother board’s a goner. Replacing the battery is cheap and easy.
When you unplugged the machine, did you hit the power button while it was unplugged? Keep hitting the button until the little blue light stops lighting up. This totally drains any power out of the PMU and sometimes does the trick as well.
Jeremy
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Could be many things, the clock battery is easy and cheap as others have noted.
If you get it started up, I’d have a backup plan ready to launch instantly, even if it means just pulling the drives and putting them in another machine.bogiesan
This is my standard sigfile so do not take it personally: “For crying out loud, read the freakin’ manual.”
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I tested the battery and it looks good. I dropped off the machine with my Apple tech today so hopefully they can figure it out. Thanks everyone who responded for taking the time to help me out. I’ll report back with the diagnosis.
Bill Carnicelli
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