Question about Apple Power Mac G5 Desktop

1 Answer

Power PC G5 Dual 2.5 sudden shutdown and no reboot

Recently I replaced the power supply (blown) from my G5, after that is shows an unpredictable behavior. It is running great for a week, all of a sudden it shutdown the video, ramp up the fans, front white led on. When you reboot, front led light up but turns off quickly, fans start, gongs but suddenly you can see front led turn back on and simultaneously a red led deep inside the machine (not the leds close to RAM) and video never begins and stays there until fans ramp up after a couple of minutes. All leds close to RAM off.

Ran Apple Diag disk and passed all, but when you try a thermal calibration it says either radiator pump error, or to remove/replace clear plastic door.

What could it be?

Posted by on

  • 1 more comment 
  • localhost Feb 14, 2009

    It is not the airflow cover unseat light, which is by the RAM. and the 2.5 GHz does not have the 7 diagnostic LED's, that's only the last generation of G5's. I have the same problem as OP, any clue what these red LEDs deep in th machine might indicate?

  • Sean Cole
    Sean Cole May 11, 2010

    Did u manage to fix this problem?

  • Sean Cole
    Sean Cole May 11, 2010

    Hi Marcos845,

    Sorry to hear you're having problems with your G5. If you open the side panel (but not the deflector shield) there are 7 LEDs next to the RAM ports - 6 directly to the left and 1 just slightly below and to the right of the others. Let me know which ones are lit numbering them from top to bottom.

    All the best
    Sean
    PiDigital


×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 369 Answers

In G5 always the cover should be closed properly if not it will start the fan very fast like a blower and the red leds will be on showing that the heat is over so please check that the cover is closed and locked from behind so itworks smooth and the power supply is standard or normal
u should always use genune parts with mac..
thanks

Posted on Jan 04, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My g5 keeps switing off,i've tryed mac-boot.still switching off.


powermac G5's are notorious for having bad power supplies. you might need to find a way to replace the power supply

Jan 31, 2011 | Apple Power Mac G5 Desktop

1 Answer

I have a 17" imac g5 that will no power up. no


Check for blown capacitors on the logic board and power supply. If you have signs of blown capacitors you will have to replace logic board or power supply.
The trick is getting the computer open. Stick a credit card in the back vent at the top of the display. Their are two tabs one and each side of the vent push forward unscrew the screws at the bottom. sit it up facing you and pull the top to you. be careful of the isight cable at the top. you will need to unscrew the LDC from the housing be careful of connected cables and check under for the blown caps.

Jan 24, 2011 | Apple iMac G5 Desktop

1 Answer

Power mac g5 automatically shutdown


Check if its not overheating.

Also check your power settings

Feb 04, 2010 | Apple Power Mac G5 Desktop

1 Answer

Apple mac G5 freezes when booting up.


Try unplugging all Firewire/USB devices. Also, unplug the power cord from the computer. This resets the logic board. If that doesn't isolate the problem, put your Original system CD that came with the computer and hold down the C key. Boot up and run Disk Utility. Run the repair disk and then repair disk permissions. Reboot and try booting your system again.

Jan 03, 2010 | Apple PowerMac G5 Dual Mac Desktop

1 Answer

How to replace the power supply on a powermac G5


I would be very cautious doing this, if you are not an Apple tech. You can damage the connector for the G5 Processors, and render the machine un-usable.

You have to remove the RAM and Processor, then remove the two power connectors that connect from the power supply to the logic board. On the bottom, underside of the chassis, there are four screws. Remove them, then you can tilt the power supply out of the bottom of the unit.

Replacement, is just the reverse.

Apr 17, 2009 | Apple Power Mac G5

1 Answer

Power Supply blew up, need to replace


Hi, Sorry to hear you are having problems,
Here is a very useful website:
http://g5.bhmm.net/
it will show you how to take apart a Powermac G5 step by step.

Mar 16, 2009 | Apple PowerMac G5 Dual Mac Desktop

1 Answer

G5 Desktop icons, cursor: horizontal lines


Hey Kim,

You most definitely have a video card problem, I have seen it many times. The AHT is different for each Macintosh, which version are you using? let me know the serial number of your computer and the version and I will tell you the correct AHT to use.

Feb 18, 2009 | Apple Power Mac G5 Desktop

1 Answer

Mac G5 shutdown and now won't power up


Sounds like a bad power supply. They do go bad... get a new one and hook it up without installing it. If it boots your machine...you've solved your problem. That battery retains some boot info and your date/time settings.

Jan 02, 2009 | Apple Power Mac G5 Desktop

1 Answer

Water block lug cracked


There are specialist Mac repairers that can supply parts on the net. You should be able to find one reasonably local to you who will be able to supply you with a replacement as these items can't be reliably repaired.

Dec 28, 2008 | Apple Power Mac G5 Desktop

1 Answer

Power mac g5 dual 1.8


If only one of the processors where recognized, the machine wouldnt boot. How are you getting that information? And where is it reporting it?


keep me posted.

Dec 25, 2007 | Apple Power Mac G5 Desktop

Not finding what you are looking for?
Apple Power Mac G5 Desktop Logo

Related Topics:

537 people viewed this question

Ask a Question

Usually answered in minutes!

Top Apple Mac Desktops Experts

Lawrence Oravetz

Level 3 Expert

7686 Answers

Cosma Papouis
Cosma Papouis

Level 3 Expert

404 Answers

Brad Brown

Level 3 Expert

13536 Answers

Are you an Apple Mac Desktop Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...