IMac G5 20" power supply problem

The power supply on my 20" G5 recently fried. Somehow I had the activity monitor showing that the "FaxJobMgr" was using about 70% of my cpu. I had had that problem before and the computer was very warm. I quit that process but shortly after that there was an acrid smell that I ultimately found was coming from the power supply. When I re-started everything came up to the desktop but then it shut down just as if the plug were pulled. I see that there were many issues with the power supply on this first generation G5. I took it to the Apple Store and they say it is the power supply AND there appears to also be damage to the logic board. $734. I'm wondering if maybe its only the power supply and they are just being cautious that there might be damage to the logic board so just replace it or buy a new computer. I thought I might try to replace the power supply only, but then that seems to be about a $120 that might be gone. Any thoughts would be greatly appreciated. Thanks

Generally speaking, the defects which affect a logic board and power supply in that family of products are similar, but there typically exists no causal link between them. It is possible to have a logic board affected by the defective electrolytic capacitor issue, a defective power supply, or both.
You can readily determine if the logic board is defective by examining the clusters of capacitors on the logic board for bloating, distended tops or leakage. If they exhibit such symptoms, your logic board can be repaired for $ 189.00 by contacting this company.
You may also need to replace the power supply, thought that determination is best made once the logic board as been verified as good or bad, and replaced, if you elect to do so. Power supplies for this product family generally cost roughly $ 139.00, and are user replaceable. Replacing the supply in a unit which exhibits the defective capacitor issue will not correct the logic board related problem, and may—under relatively rare circumstances—cause the eventual failure of the replacement supply.
*I may receive compensation as a result of parts or services being ordered by users specified at the link shown in this message.

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Power supply problem a little better after unplugging imac for 24 hours

Hello,
I'm currently having power supply problems (at least I hope it's the power supply and not the mother board), similar to many others I've seen on these boards. What I've noticed is that if I unplug my iMac for about 24 hours I can get it to run again for a little while. Unplugging it for a few minutes (or even 8 hours) doesn't seem to help. My iMac won't get much further than the starting chime before it loses power. But it seems to me that unplugging it for 24 hours has gotten me between 5 days to 5 hours of use before I unexpectedly lose power.
Is there anything to account for this or am I just imagining things? Ultimately, I don't think the answer will help me much, but I am curious to know. I'm taking my iMac to a Mac Genius tomorrow to see if they can help diagnose the problem. I saw a little hit in my video today, which was a first, so I suspect the problem may be getting worse. I'll probably be buying a new power supply soon.

I'm having the same problem. They say to restart you have to unplug the power, wait 10 seconds and then plug it back in but apparently it's not enough. I have to unplug for about 30 seconds, plug back in, and wait anywhere from 30 minutes to several hours before it'll start up again properly. The last time I had this issue was in october '06- when I had a new logic board and power supply put in. Now I'm worried because my applecare is expired by about 3 months. I bought the computer in feb. '05. I hope a new board doesn't cost more than what the computer itself is worth but I'm afraid that'll be the case...

Ask your question.MC508LL/A power supply problems, Ask your question.MC508LL/A power supply problems, Ask your question.MC508LL/A power supply problems

I have just replaced my older IMac with a new one because of a cronic power supply problem. Now I see this one is doing the same thing. Is anyone else having the same issues with their MC508LL/A.

I'm with babowa there ... I would suspect the power souce, not the PSU. Where you live could be an issue depending on how reliable and 'clean' the electricity is to your home. If that is ok then it could be the wiring in your house ... if it were mine, I'd need an electrician to check it out.
Personally, I've had computers hooked to my electric service since 1995 and no UPS (despite recommendations) and never encountered a problem with the computers ... many electrical issues (brown outs, outages, etc), just been fortunate they didn't affect my machines.

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How easy should the power supply come out...how much force can I apply without breaking the computer's case?
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Experiences welcome!
Thanks
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hi Jurgen.... i just get a new imac g5 and it presents power supply problems the very first day they bring it... so the retalier took it for a repair..i been wating for two months and no sings of a solution... i am looking for help but i can't reach anyone at apple .... so i need some tips here... what should i do?? i tried the chat agent but they are closed..and the retailer refuse tho give enough info to check out about the repair status..they keep saying that the frabric respond very slow and then that the new part they recieved from apple was defectous... well.. if anyone can give me some tip would be very nice and usefull.. i really don,t now what to do... some email to inform apple the situation ?.... thanks for read this... Fernando

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Hello,
We've installed the new motherboard today, it model is PT880 Neo LSR. Well we've got everything plugged in, but when we try to turn on our computer it doesn't turn on.
There is a case switch, but when turn on, the fans work for like 1 second then it stop.
I've tried the Troubleshooting guide on the website, and studying the Manual, but I could not find a way to fix this.
Can anyone help us fix this power supply problem please?
Thanks

Quote
Originally posted by DarkDuelist
yea, it comes with the 4-pin atx1 connector and 20-pin atx2 connector.
But i just exchanged another mainboard, and still not work. the first time i test it, i only plug the 4-pin and 20-pin connector into the mainboard and it worked. i thought the problem was solved. so i put everything else in (cpu, hdd, cd-rom, dvd-rom...) then test it again. I only heard a sound psssst, and nothing run. I tested it many time and it still not work. Then I UNPLUG the 4-pin connector from the power supply to the mainboard, and test again, this time, only all the fan RUN except the the fan in the power supply DID NOT run. Is it because that the power supply got problem? I used another power supply 420w to test but nothing run either.
MATSONIC motherboard MS9087C
DDR 400
Intel celeron 2gh 400 fsb
Macron 350w power supply
The psssst sound----sounds like something shorted out. Pull everything out and put it back in with a different PSU.
Don't put a hard drive or floppy in-----just CPU, RAM mobo, vid card, fans, PSU-----see if it will post.

Asus power supply problems

I am considering a new Asus netbook but have been reading a lot of failure issues on their power supplies going clear back to Sept. Even as soon as December I find people saying they cannot get them replaced because Asus says they are still out of stock. Has anyone got any updated information on this?

As I said I am considering purchasing a new Asus netbook. I do not have one yet. If you look at even the Best Buy customer ratings you will see several with the power supply problem. The internet is full of these complaints on other web sites.

IMac G5 bluetooth + airport + power supply problems - oh and the dvd drive

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I just wanted to hear any suggestions before I decide whether or not its worth it to bring in the computer. Nothing shows up in system profiler under bluetooth or airport. Should I just lie to the "genius" and tell them that my computer still shuts down randomly? I think that way they would at least replace the logic board (which I think is the problem) before telling me to sell my kidney and pay for repairs. I've tried reseting the SMU, and I looked at the bluetooth and airport cards to see if they had been accidently disconnected during the PS replacement. They are actually screwed into the logic board so I think their connections are efficient.
Oh and about the DVD drive. I have to use two cd's in order to burn a single disc. The first disc I put in the drive NEVER works. It spins for about 30 seconds then starts buzzing like blender and spits the cd back out. The second blank disc I put in USUALLY works, but sometimes it takes three discs. This problem has always been there since day 1, but I don't burn enough cd's for it to be an issue.
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OK, first thing -to restore your bluetooth, shut down, unplug for a few minutes and then reboot. Thay usually brings the BT back. You should also repair permissions. Reset your SMU nd your PRAM as well.
Try those four things and please post back,
Miriam

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I'm on my second power supply on my iMac 27" about 6 months old. Wouldn't wake up from sleep (twice now). Luckily, it's still under warranty, but I'm wondering if anyone else is having the same problem or if I got a "lemon" iMac? It's a bummer being without a machine for a week every few months. Will Apple replace it or do I have to go through this every few months?

If you haven't already I would STRONGLY recommend buying Apple Care. On a computer that is covered by AppleCare if the same thing happens 3x Apple will replace the computer. If you aren't familiar with AppleCare it:
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2. Offers AppleCare telephone support. This can be very useful if you are new to OS X or Macs.
You can buy AppleCare directly from Apple or you can frequently find it discounted from authorized Apple Resellers such as Amazon or LA Computer Company.
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Hello,
I'm a proud owner of an iMac 27" which I ordered with the Apple Wired Keyboard because it was equipped with two additional USB Ports.
I'm using the Astro Gaming Astro A40 with their Mixamp and it works perfectly fine if I plug it into the keyboard.
Now I installed Bootcamp with Windows 7 Professional and it tells me the power supply in the keyboard is to low for my headset and my Mixamp.
Does anybody know a solution for that problem?
Why does Windows cry about that while Mac is perfectly fine with this.
I hope somebody can help me. Thank You
With best regards
ChickenDuy

From
Support FAQ - Astro Gaming
For PC Users: Much like discrete graphics, audio, or physics hardware free up CPU cycles and make our games run faster, the USB drivers built into the MixAmp provide a simple plug and play solution to offloading communication and music duties to the MixAmp.
My guess would be that these drivers are not loaded in OSX. When you run Windows via bootcamp, these drivers are loaded. Based on the function described, they draw more power from your USB bus than they would in the OS X environment. Yet the machine is still only willing to supply 500 mA to the particular hub. I think, therein lies the problem. Or, atleast, a theory.

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Hi Joel,
For the external drive issue try resetting your firewire ports.
To do this, shutdown and disconnect the firewire devices from your computer and from each other if there is a chain of them. Now disconnect the power cords from both your computer and from the firewire devices. Wait fifteen minutes. Connect up again and see what happens. The FW ports on Macs have a 'self re-setting fuse" that requires all power to be removed for a period of time for re-activation.
You may also want to try a PRAM reset if that doesn't resolve the issue. Sometimes this can also be implicated in FW problems. Shut down. Hold down the command option p r keys. Now start up, keeping the keys mentioned depressed until the chimes have sounded three times.
Cheers
Rod

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Voltage readings from sensors (current data):
w83697hf-isa-0290
Adapter: ISA adapter
Algorithm: ISA algorithm
VCore: +1.76 V (min = +0.00 V, max = +0.00 V)
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fan2: 2033 RPM (min = 1500 RPM, div = 4)
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How to retrieve data from iMac g5-no power supply

Hello all,
I have a iMac g5 that the power supply is shot. The computer no longer goes on. The software is OS X (tiger) 10.4. I took my computer to apple and because if the age of the computer they are not able to fix it. However I do have a lot of pictures and my graphic stuff, as well as music. U
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But how to I retrive the info once the harddrive is removed
call OWC to find out what type of encloser you need. will need both your new computer & old hd in hand. ( actually, owc may be able to tell you what encloser you need before you get the old hd in hand. Call. )
$ get some use on your credit card.
plug old drive into new enclosure ( call owc for help if needed. )
plug new encloser into new computer.
hd icon will appear on desktop. double click on hd icon to begin.
& you can now backup you new computer hd to old drive. Best to buy new drive & backup to new drive in encloser
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Hi, My iMac G5 power supply is officially dead. It was confirmed at the Apple Store at the Genius Bar. Apple apparently no longer sells the power supply for the first gen iMac G5s. I have two questions: Does anyone have a suggestion on where to buy a 3rd party power supply for that model? I'm not exactly sure what I should be buying. And secondly, is it worth it to do? I know the second question is more opinion but I'm curious of the success rate of replacing the power supply. My preference is obviously to replace it rather than laying out the money for a new iMac which I probably can't do right now) but if anyone's experience is that I'm just throwing money away on the power supply because of future issues or unreliability, I'd like to hear about it.
Thanks as always!

[Synaptech.com] or [welovemacs.com] will not only sell you the correct part, they will give you installation instructions. Another source is [http://www.jimwarholic.com/2008/07/how-to-repair-apple-imac-g5.php]
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http://discussions.apple.com/message.jspa?messageID=3006257#3006257
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IMac G5 20" power supply problem

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