Go Back   MacRumors Forums > Apple Hardware > PowerPC Macs

Reply
 
Thread Tools Search this Thread Display Modes
Old Nov 27, 2010, 02:38 PM   #1
mcgregor37
macrumors newbie
 
Join Date: Aug 2008
Power Mac G5 Shutting down, Overheating?

I've got an early 2005 model Power Mac G5.
Bought it from a hospital and it's really clean inside.
Lately it's been shutting down spontaneously without warning.
I thought it might be an issue with overheating, but I'm not that familiar with normal heat levels for a CPU.

I installed iStat nano and checked the temperatures.
I took a screen shot of the widget.
Temperatures are in Fahrenheit.
Can anyone tell me if I'm on the right track?
What do I need to do to solve this problem?

Power Mac G5 (early 2005)
PowerPC G5
Dual 2.3GHz
2 GB DDR SDRAM
Model Number: A1047
Attached Images
 
mcgregor37 is offline   0 Reply With Quote
Old Nov 27, 2010, 02:56 PM   #2
d88co88
macrumors 6502
 
Join Date: Dec 2009
Location: MN
Check for leaks in the liquid cooling system. That might be the cause.
__________________
A bunch of Macs, some audio equipment, and an iPhone.
d88co88 is offline   0 Reply With Quote
Old Nov 27, 2010, 03:13 PM   #3
California
macrumors 68040
 
California's Avatar
 
Join Date: Aug 2004
No, the 2.3ghz is not a liquid cooled Powermac. Only the 2.5/2.7ghz duals and the Quad.

You would be surprised at the error messages that happen with old or bad hard drives or wonky dvd drives. Check this first. ALWAYS make sure you have new hard drives when buying an old Powermac g5.

Then make sure the ram is working right, switch around the positions with the matched pairs.

There was a recall on the Powersupply on the mid 05 last revision powermac as you have. Don't know if this is theproblem or not.

Call Apple, maybe you'll get lucky and they'll replace the powersupply
__________________
2.66ghz 13" MBP/1.67ghz Powerbook G5 15" DLHR/iPhone 16gb/30" ACD
California is offline   0 Reply With Quote
Old Nov 27, 2010, 03:17 PM   #4
MacBoobsPro
macrumors 603
 
MacBoobsPro's Avatar
 
Join Date: Jan 2006
Send a message via AIM to MacBoobsPro
Mine used to shut down when the graphic card overheated because the drivers for it were wrong and so the fan on the gpu didnt work.

I'd be working away and the mac would just switch off with no warning.
MacBoobsPro is offline   0 Reply With Quote
Old Nov 27, 2010, 03:44 PM   #5
d88co88
macrumors 6502
 
Join Date: Dec 2009
Location: MN
Quote:
Originally Posted by California View Post
No, the 2.3ghz is not a liquid cooled Powermac. Only the 2.5/2.7ghz duals and the Quad.

You would be surprised at the error messages that happen with old or bad hard drives or wonky dvd drives. Check this first. ALWAYS make sure you have new hard drives when buying an old Powermac g5.

Then make sure the ram is working right, switch around the positions with the matched pairs.

There was a recall on the Powersupply on the mid 05 last revision powermac as you have. Don't know if this is theproblem or not.

Call Apple, maybe you'll get lucky and they'll replace the powersupply
Sorry, my bad. I forgot that is was only those two models.
__________________
A bunch of Macs, some audio equipment, and an iPhone.
d88co88 is offline   0 Reply With Quote
Old Nov 27, 2010, 03:54 PM   #6
rtrt
macrumors 6502a
 
Join Date: Jan 2008
have a look on console and see if you can find any unusual events before it switches off
rtrt is offline   0 Reply With Quote
Old Nov 27, 2010, 04:10 PM   #7
blackburn
macrumors 6502a
 
blackburn's Avatar
 
Join Date: Feb 2010
Location: Where Judas lost it's boots.
Looks like bad caps in the power supply. Those macs had leaky caps that when they fail they can cause all kinds of caos, like random shutdowns or hang ups.

Edit: Not sure if it's the psu or the motherboard caps. And the heat output is a capacitor killer.
Also check this http://www.xlr8yourmac.com/systems/D...Shutdowns.html
__________________
Lenovo ThinkPad + Nexus 7 (2nd Gen)

Last edited by blackburn; Nov 27, 2010 at 04:20 PM.
blackburn is offline   0 Reply With Quote
Old Nov 27, 2010, 06:13 PM   #8
666sheep
macrumors 68040
 
666sheep's Avatar
 
Join Date: Dec 2009
Location: Poland
Temps are perfect.
When G5 is overheating it just freeze, so temperature isn't your problem.
First reset PMU and PRAM. If you have multimeter, check PRAM battery voltage (it should be about 3.6V).
It could be bad PSU ofc but with symptoms like this it's hard to rule it out without having working spare one.
666sheep is offline   0 Reply With Quote
Old Dec 6, 2010, 03:35 PM   #9
mcgregor37
Thread Starter
macrumors newbie
 
Join Date: Aug 2008
Thanks, I'll keep you posted

Thanks everyone for the suggestions.

I've switched around the RAM and added 2 GB to give me a total of 4 (needed to do that anyway for HD video).

I'll be getting a new Hard Drive soon to replace the old one (just for good measure.)

I also tried resetting PRAM, but I couldn't get more than one chime, so I reset the PMU. After that I was able to reset the PRAM, so I'm hoping that did the trick.

Thanks again.
mcgregor37 is offline   0 Reply With Quote
Old Dec 8, 2010, 12:27 PM   #10
mcgregor37
Thread Starter
macrumors newbie
 
Join Date: Aug 2008
And it continues

Computer just shut down when I tried to download a driver for the wireless printer in the office.
I took a look at console, but I'm not exactly sure what I'm looking for. Can anybody tell me if they see something funky with the console screenshot?
I did also have issues ejecting a CD yesterday, which makes me wonder about the wonky DVD drive idea.
Any thoughts?
Thanks
Attached Thumbnails
Click image for larger version

Name:	Picture 3.png
Views:	129
Size:	74.1 KB
ID:	263272  
mcgregor37 is offline   0 Reply With Quote

Reply
MacRumors Forums > Apple Hardware > PowerPC Macs

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
thread Thread Starter Forum Replies Last Post
Why is my mac shutting down like this? (screenshot) Sir Loin Steak iMac 5 Jan 3, 2014 06:23 AM
Mac keeps shutting off Fireslayer iMac 0 Dec 11, 2012 05:58 PM
Power Mac G5 Quad overheating - LCS problem (photo) Tryp PowerPC Macs 5 Dec 6, 2012 04:57 AM
Fix Power Brick Overheating Ancana Mac Pro 3 Oct 16, 2012 04:22 PM
Fix Power Brick Overheating Ancana MacBook Pro 10 Oct 16, 2012 01:50 PM

Forum Jump

All times are GMT -5. The time now is 11:40 PM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps

Mobile Version | Fixed | Fluid | Fluid HD
Copyright 2002-2013, MacRumors.com, LLC