Question about Apple iMac G5 Desktop

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Lower fan Not working

The lower fan on my imac G5 is not kicking on thus im overheating, ive tried resetting it. nothing happens. Should I replace it? Thanks

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You can check the LED lights inside the computer to see if it's a power supply problem.  Apple's web site has the support troubleshooting section.  You can look for the info that tells you what they each mean.  What they don't tell you is how to start the computer without the back on.  You will have to get the info from the web site for the rest of my message to make sense.  Find the info that has the pictures of the inner part of the computer.  
Then find the two small buttons one above the other to the left of the LED lights.  If you press the one on top your computer will turn on.  From that point at least you'll have a better idea of what the problem isn't.

Posted on Jun 05, 2008

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Call Apple, I have a friend that had the same problem. Not sure if it's the fan or the power supplied to the fan.

Posted on Apr 25, 2008

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Posted on Jan 02, 2017

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Hi Joseph,

Well it's a 9 year old iMac.. it sounds to me like the power supply has failed. Nothing under $300 to fix unfortunately

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Bad capacitors often cause the no-turn-on problem. This page has a good picture of what bad caps look like in the G5. If you see this trouble in your G5, you might be able to get this going. Kits of capacitors are available (here's the place I got some from) and If you're comfortable with electronic soldering and replacing parts on a printed circuit board, changing out the duds may be all that's needed. I've seen three of these now. On one, there was just a single bad cap that was keeping the computer from starting up. It's certainly worth looking into.

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Red reset button keeps kicking out, i reset button and works fine for a day or two then kicks out again


The reset button kicks out because the thermostat detects overheating.
Anything over 150 degrees, the reset kicks out.

This is caused by 4 things.
1) Bad upper or lower thermostat. Thermostat sticking in 'on' position and elements overheating water.
2) Factory-installed insulation and cover are removed
3) Bad element shorted to ground at center of element, and element continues heating with 120V through the ground wire.
4) Loose wire near upper thermostat, that is shorting and causing heat.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Solution:
Check for missing insulation.
Check for loose and burned wires.
Replace both upper and lower thermostat.
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

If problems continue, test water heater elements and replace bad element.
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If you need more help, add a comment and I will respond.
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G5 keeps powering up for a few mins then switches off?


Thank you for contacting Fixya Support, I am glad to assist.

There are a few steps you can try to troubleshoot this issue:

Try a PMU Reset:
* Turn of your iMac if it is already turned off
* Disconnect all connections to the iMac except the power cord
* Now disconnect the power cord for approximately 20 seconds
* Reconnect just the power cable the keyboard, mouse and power cord, and then power your iMac G5 up.

* Check to see if the iMac boots up normally without power interruption.

* If the iMac G5 shuts off again, try these steps, another recommendation would be to remove all connections including the power cord, and lay the iMac G5 on soft cloth face down and with a philips screwdriver, remove the plate on the bottom of the iMac G5 where your RAM memory is located.
Before removing the RAM however, touch your hand on the metal boot to discharge any static current you carry for approximately 5 seconds.

Now remove each RAM card and then reseat (re-install) each card.

Restore the RAM card cover with your Philips screwdriver, reconnect your power cable, keyboard an
d mouse and turn on your iMac G5.

See if this second procedure helps if the first procedure does not work.

Let me know if this helps.

Regards

-Mactechtrainer

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Your camera will not work with Mac period. It is a digital camera but is outputting an analog signal. Been there and done that with a TRV camera myself. There are lots of cameras that will work with your G5 Mac. I am now using a Sanyo VPC-HD 100 with my Intel iMac and it works great. Click the link for some supported cameras. This is not all of them. http://support.apple.com/kb/TA20587

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I have one doing exactly this at the moment. It had gone to sleep and the fans were going like crazy. I think it is a Motherboard failure (it happened with many G5 iMacs), this one has been replaced once already, and I can't actually get it to install anything. I'm taking it apart tomorrow to see what I can find inside. If I fond anything I'll let you know.

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4 Answers

17" iMac quit working



Your Imac may be one of those affected by Apples purchase of inferior capacitators from Taiwan. If you are less than 3 years from the purchase date, apple will repair the problem for you for free. Just take the unit to your nearest local Apple Genius or tech. If you are outside of the repair extension guidelines, I have provided a link here which can show you or someone more skilled how to repair the problem. Ordering a new motherboard and power supply will set you back a lot of money, however the following guide and pdf give you step by step instructions on how to ressurrect your dead imac without speding more than $100.00. I was able to repair my imac using this guide and it was worth it to save a $2k computer that was only 3 1/2 years old. Check it out:

the following information (in italics and bold)  is taken directly from: http://www.jimwarholic.com/2008/07/how-to-repair-apple-imac-g5.php.  (this site is complete with instructions, manual and the full compliment of materials available at an extremely affordable and fair price. I took a chance and repaired my own, it is not as hard as it sounds1)

The iMac G5 Repair Extension Program for Video and Power Issues applies to first generation iMac G5 computers that have video or power-related issues as a result of a specific component failure. If your iMac G5 is exhibiting any of the symptoms listed below and your computer's serial number is within the noted ranges, your computer may be eligible for repair, free of charge. If Apple or an Apple Authorized Service Provider (AASP) determines that your iMac G5 computer is eligible as part of the program, the repair will be covered by Apple for up to three years from the original date of purchase even if your iMac G5 is out of warranty.

This is a worldwide Apple program.
Affected systems will exhibit one of the following video- or power-related symptoms:
Scrambled or distorted video 
No video 
No power 
Note: If your iMac G5 is not experiencing any of these symptoms, you do not have to contact Apple or any Apple Authorized Service Provider.

Which iMac G5 computers are affected by the iMac G5 Repair Extension Program for Video and Power Issues? 
The program is available for certain first generation iMac G5 models that were sold between approximately September 2004 and June 2005 featuring 17- and 20-inch displays with 1.6GHz and 1.8GHz G5 processors.

The affected iMac G5 computers have serial numbers where the first 5 digits fall into the ranges noted below.

Serial Number ranges:
W8435xxxxxx - W8522xxxxxx 
QP435xxxxxx - QP522xxxxxx 
CK435xxxxxx - CK522xxxxxx 
YD435xxxxxx - YD522xxxxxx 
Some second generation iMac G5 computers have serial numbers that fall within the upper band of the ranges listed below. Only first generation iMac G5 computers are affected by this program.


Where do I find the serial number of my iMac G5?
The 11-digit serial number is located on a label under the foot of the iMac G5. There is a bar code underneath the serial number.
To view the label, hold the sides of the iMac and gently lay the computer face down on a soft, clean towel or cloth.



Is the iMac G5 Repair Extension program available for other Apple computers? 


This program applies only to the systems noted in this FAQ. Other versions of the iMac G5 line are not part of this program. Click here for more information on how to identify iMac G5 models

Free guide for how to repair the motherboard capacitors, rescue the hard drive and more.

http://www.jimwarholic.com/docs/Repairing-Apple-iMac-G5-Motherboard.pdf

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I am trying to removie the hard drive on my imac g5 17 inch and when i try to open the back (as the online manual states to), the entire back comes out with the screen attached.  how do i only open the...


Make sure all cables are disconnected. Make sure you are only undoing the three silver screws along the lower edge of the unit. (These are captive screws and should not be removed).There is one screw at each end and one in the middle. Tilt the cover up and lift it away from the computer.

Jan 05, 2009 | Apple iMac G5 Desktop

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