Do I Need a New Power Supply

[robg264]

I've been having some issues over a year now with my Mac G5 1.8Ghz Late 2004 (The one that the memory can only be maxed to 4 gigs). What's been happening is that when I run my music software or any software that raises the temperature on the computer it goes into a sleep mode. I installed that free temperature program everyone uses and when I first turn on the MAC it states that my processor is 58 degrees but as soon as I run a program it jumps to about 64, 68, 74.4 and then that's when it goes off.

I work on PC's alot at work. When I see issues like this, the first thing I think of is the heatsink. I took out the logic board, power supply and cleaned everything with a dust can. I even took off the heatsink and put a little bit more of that heatsink silver paste onto the processor which did cool my CPU to the new 58 degrees before it was 60 something can't remember.

I took out the power supply and saw all the nasty dust on the fans and I remember always hearing that nasty noise that fans make when they sound like they're dying. So I bought new 60mm good fans for the power supply. Sounds so much quieter now.

Cleaned the entire case and put everything back in it's place. I even customized a new dual cooling fan to be place in front of the plastic that sits on the heatsink to have extra air blowing in front since the back is getting air. I noticed dual macs already have fans like that in their machines but not mines.

After all is said and done with a new clean, dust free Mac, it shut down on me again when running my music software.

Here's is the Console Log where it states the problem and I searched for the keyword everywhere on the internet and no hits whatsoever.

So I'm wondering, do I need a new logic board, new power supply? My warranty is over and I can get the Applecare but standing in these longs lines at the Apple Store is daunting.

What do you think?

Feb 21 02:27:05 music-studios-power-mac-g5 kernel[0]: IOSMUPwrController:: OverTemp notification
Feb 21 02:27:05 music-studios-power-mac-g5 kernel[0]: Power Management received emergency overtemp signal. Going to sleep.AirPort: Link DOWN (Client disAssoc 0)
Feb 21 02:27:06 music-studios-power-mac-g5 launchd: Server df47 in bootstrap 1103 uid 0: "/usr/sbin/lookupd"[677]: exited abnormally: Hangup
Feb 21 02:27:06 music-studios-power-mac-g5 configd[57]: posting notification com.apple.system.config.network_change
Feb 21 02:27:20 music-studios-power-mac-g5 kernel[0]: System Sleep
Feb 21 02:27:20 music-studios-power-mac-g5 kernel[0]: System Wake
Feb 21 02:27:20 music-studios-power-mac-g5 kernel[0]: Wake event 0020
Feb 21 02:27:20 music-studios-power-mac-g5 kernel[0]: FireWire (OHCI) Apple ID 52 built-in: handleSelfIDInt - received quads == 0. issuing bus reset
Feb 21 02:27:20 music-studios-power-mac-g5 kernel[0]: Sound assertion "kIOAudioDeviceActive != getPowerState()" failed in "AppleOnboardAudio/AppleOnboardAudio.cpp" at line 6920 goto handler
Feb 21 02:27:21 music-studios-power-mac-g5 kernel[0]: USB caused wake event (OHCI)


The keyword in that log is:


Feb 21 02:27:05 music-studios-power-mac-g5 kernel[0]: IOSMUPwrController:: OverTemp notification
Feb 21 02:27:05 music-studios-power-mac-g5 kernel[0]: Power Management received emergency overtemp signal. Going to sleep.AirPort: Link DOWN (Client disAssoc 0)

I move the mouse and it comes back up.

 

[supanatral]

How long after you start the program does the computer turn off?

If it goes off in a couple of seconds, then its quite possible to be a software problem because it might not be reading the sensor correctly. The reason for me saying this is because its almost impossible for a processor to heat up that quick.

However if it takes a couple of minutes to turn off then it could be a hardware issue. How many rpm is your fans running at?

 

[robg264]

Thanks for writing back. The computer shuts itself off sometimes when I'm not doing anything.

Write now the Hardware Monitor program reports my CPU at 71.5 C
according to that Hardware monitor it seem the specified upper limit is 76.0C and when it reaches that temp the computer shuts down into that sleep mode until I move the mouse and it comes on again.

Front Fan at 1000 RPM (Specified upper limit is 3200) lower 800
Rear Fan 0 at 3200 RPM (Specified upper limit is 3200) lower 800
Rear Fan 1 at 3200 RPM (Specified upper limit is 3200) lower 800

I'm thinking of just getting an Apple Care since I bought this used from someone on Craigslist in my area. Do you think apple care will replace parts or is Apple Care is just for them to look at it and I have to get a new logic board?

How long after you start the program does the computer turn off?

If it goes off in a couple of seconds, then its quite possible to be a software problem because it might not be reading the sensor correctly. The reason for me saying this is because its almost impossible for a processor to heat up that quick.

However if it takes a couple of minutes to turn off then it could be a hardware issue. How many rpm is your fans running at?

 

[g/re/p]

Apple Care can only be purchased during the first 12 months after
purchasing a new mac, so if it is used and the original owner had
it more than 12 months you will not be able to get apple care on it.