Question about Apple iMac G5 Desktop

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IMac G5 I was on my iMac G5 when the screen blinked, then black out completely. Now the computer won't turn on at all. Tried all the troubleshooting suggestions in the manual. Can anyone help? -Thanks!

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If it isn't the power supply, some of the early G5 imacs had a capacitor failure issue...mine just died, in fact. It was just shutting off by itself, even turned on once by itself....but tonight, when it shut down, it would not restart. I opened it up and looked and sure enough, 11 bulging/leaking capacitors. My local service center says there are two options: 1. new mother board-aprox $500 or replacing the capacitors- between $170-200. Until Dec 15, 2008..this was apparently covered under a special warranty extension program Apple had....typical!

Posted on Mar 07, 2009

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You need to contact apple support for the same

Posted on Jun 30, 2008

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Dec 26, 2011 | Apple iMac G5 Desktop

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Upon booting, the screen goes snowy. Sort of like a tv with no cable connected. It will do this several times and finally will be ok. But, if I do not use the computer for a while it goes snowy again and...


Have you tried starting from the system disks that came with the computer? Put the disk into the computer and start up holding the C key down. Troubleshoot from there.

Nov 24, 2010 | Apple iMac G5 MA064LL/A Desktop

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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

Sep 11, 2010 | Apple iMac G5 Desktop

1 Answer

I have an iMac G5 2Ghz that when it start up you can only see video for a few seconds. I connected an external monitor and my iMac works fine but with its on LCD there is no video. I check the logic board...


Sir,
The iMac G5 and iMac G5 (Ambient Light Sensor) computers have a video out port located on the back of the computer, which will mirror video. Video mirroring means you can see the same image that is on the iMac G5's flat-panel display on an external monitor, television, or projector.
Using the video out port, you can mirror video with a compatible VGA display using the Apple VGA Display Adapter.
You can also use the video mirroring feature with a television or projector that has S-video or composite video connectors when you use the Apple Video Adapter.
Both the Apple VGA Display Adapter (M8639G/A) and the Apple Video Adapter (M9109G/A) are available separately, and are needed if you want to use your iMac with a VGA monitor cable, S-video cable, or composite video cable.
The video mirroring feature is "plug and play". Simply connect a VGA display, television, or projector to the appropriate adapter (see above), then connect the adapter to the video out port located on the back of the computer.
When you connect the adapter to the computer, the screen may refresh momentarily as the computer prepares itself for the new video output. The computer tries to match the resolution of the built-in and external display. If there is no match, the computer changes both screen resolutions and may black out areas on the built-in display in order to match the capabilities of the external display.
Important: To ensure that your iMac G5 automatically detects the external display or projector, be sure you plug the adapter into the external display or projector before you plug it into the iMac G5.
You can switch resolutions and frequencies for both the iMac G5 flat-panel display and the external display, television, or projector using Displays preferences.
Want to watch a DVD movie disc on a television that's connected to your iMac G5? Select a 720 x 480 NTSC (in the United States) or 720 x 576 PAL (in Europe and other regions) resolution in Displays preferences.
Tip: Because of the display limitations of most televisions, the images displayed on a television screen are usually not as high quality as those on the built-in display or an external monitor.


Thanks
Good Luck

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1 Answer

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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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1 Answer

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It sounds like you need a new motherboard.

May 06, 2009 | Apple iMac G5 Desktop

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