2.3 G5 Crashes and Fans Running Full Blast

My work horse G5 dual 2.3 crashed today and the fans were running full blast.
I did some research and have:
-run Disk Warrior
-reset the PRAM
-reset the SMU
-replaced the 3.6V battery with a $20 battery from Radio Shack.
The system still crashes, leaving the fans running a full speed. Then, I noticed that only 1 CPU is being recognized. :"(
Is there anything I can do to get the other CPU back up/ recognized or is it dead?
Is it feasible to buy a CPU off ebay to replace mine? If so, is it a straight forward operation or very tricky?
Thanks.

Thanks for the reply and link, japamac. That thread didn't pop up in my search.
After following your link, I ran the Apple Hardware Test. The detailed test took right at an hour and a half (three times longer than it said) and returned no problems.
I restarted and both CPUs showed up in the Activity Monitor and things were fine for about 20 minutes, then the system simply froze, while I was running Safari and Firefox. But, no loud fans this time.
Upon a hard restart and then a soft restart, I'm back to one CPU.
Since only one CPU is showing up, I don't have a faulty one to deselect (I installed the "Processor" System Preference from the Developer>Extras>PreferancePane) or disable via Terminal.
So, I've got a couple of questions:
1. Where are the error logs that I should look at?
I've opened the Console, but can find no mentions of "panic" or "cpu," other than some 3 year old references under "Java."
2. More importantly, *how do I know +which CPU+ has failed*?
I see no references to "CPU 1" or "B" or "0" or "A." It's as if I've suddenly got a Single 2.3 G5.
3. Any possibility that this is a software issue?
I'm wondering if a recent update of Safari could somehow be a culprit. I had it open and also had Firefox open, both with 10-12 tabs. I know they can be memory and processor hogs.
Anyway, I will reseat the CPUs and grab a serial number while in the process and report back after a while.
Thank you for your help.

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the only thing new lately is that I installed Leopard 10.5.3 on my dual 2.0 GHz G5 tower.
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This time I disconnected my Belkin USB hub and I have not seen the problem resurface since.
The interesting thing is that cleaning out the machine and resetting the PMU sure seemed to help.
So maybe it was a combination of things that were the culprits.
I also wonder if I can ever use this perfectly good and only 1 year old Belkin USB 2.0 hub ever again.
My father uses the same model on 10.5.4 as well on his MacPro without any problems. I am on a G5.
I wonder if there's a firmware on the Belkin USB hub that could be in need of upgrading or if I simply cannot use this hub w/ this computer anymore.
(luckily I don't need it urgently right now)
I will report back if the problem happens again, but for now, since the computer has been sleeping totally fine for days now since removing the USB hub, I am marking this question as answered and hope that this info can help other people.
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Try a Heat gun...
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A fan issue is usually related to the SMU. I see that you tried that, but if you used the +push the button on the motherboard+ method, try the +unplug the power cord+ method as described here
http://support.apple.com/kb/HT1436
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Hi All,
I have gone through the forums and haven't found an answer to this one. I have an Intel Mac Mini running the latest updated Tiger that I use solely for a media center.
About a week ago, the box started running fans full blast, regardless of whether it was actually turned on or not. As soon as it is plugged in the fans blast.
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The steps I have taken so far include resetting permissions, verifying the disk, and resetting the SMC in the proscribed fashion.
After this occurred, I downloaded and installed smcFanControl from Lifehacker.com. This reported fan speed of zero and Temperature of zero.
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Should I take it apart further and see if the other end of the fan/HD cable has somehow worked loose?
Can anyone think of another cause besides a loose cable?
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I have refurbished two G5s with LCS and screaming fans (this was avery common problem with G5 LCS macs), the red light on the motherboard could mean the CPUs need to be re-seated. This red LED light appeared on my mac after I had removed the CPUs to add new thermal paste.
If you have done all the necessary basics with no sucess here are a few things to try next.
1 - Coolant
As BDAqua mentioned above, coolant evaporates and often leaks at the 'O' rings, to check this you will need to remove the CPUs from the LCS and check for crystalisation (white rice). If you have leakage, it will be time to drain the block, add new coolant and 'O' rings. This is tricky to do but there is lots of info here and on other sites to help you.
2 - Thermal paste
Replace the thermal paste with Artic MX4.
Try the above and let is know how ou get on.

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My first thought is that one of the two thermal sensors came unplugged with it being upside down/jerked; if so then it needs opening up and reconnecting by Apple. It shouldn't do this so warranty kicks in.
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http://docs.info.apple.com/article.html?artnum=303319

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Hey there folks,
I have a Mac Pro (early 2008, MacPro 3,1) with the OEM Nvidia GeForce 8800 GT graphics card.
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I replaced the card. At first I took it to the Apple Store but the person there said its basically just a somewhat common hardware failure on the card. Not much to do but repair or replace it.
Rather than spend the time and money to have them diagnose it further just to tell me the same thing I replaced it outright with a card from Other World Computing; the ATI Radeon HD 5770. IT was a good alternative for my machine which, due to it's hardware configuration, has only a few to pick from as viable replacements. It's been working fine so far, no complaints. Just be aware it is a BEAST of a card and puts out a lot of heat.

Black screen and fan running full- bore

Computer was running fine when I closed the lid (no shutdown) to put it to sleep for the night. Next morning as usual I opened the lid but the screen showed no signs of waking up. The battery was apparently dead so I plugged it in. Pushed the power button and the fan came on full-bore and the screen never showed a sign of coming to life. Restart, no help. Attempted to zap the PRAM but no signs that the key commands were recognized. (2 month old keyboard after the computer took a nasty fall and the old one popped out damaging the ribbon cable connector). Inserted a disk I thought would allow the computer to boot off of, it did some spinning but no change in computer's operational status. Eject button or key commands now fail to get the CD out. The only way to restart is to press power button until computer goes off then press again to start. The fan just keeps on running but nothing on the screen.
Connected computer to external monitor, no help, even after restarting. The monitor is connected to a G4 platinum tower so I know it works.
I also don't see a way to eject the inserted CD manually as command E, eject button, won't eject it.
I'm at a loss! First time a Mac has gotten the best of me. None of my years of little trick gathering has helped.

I tried holding down the trackpad button (forever), no help.
Was the computer all the way off (no lights, fan, sounds, etc.)?
Hold down the power button for ten seconds to shut everything off. If that doesn't do the trick, unplug the power adapter and remove the main battery. Then put them back, hold down the trackpad button, and start up. Is your CD ejected this time? If not, shut everything down again.
If it's a bootable CD, try booting to it after resetting the PRAM: hold down the p and r keys while starting up, and keep holding them down until you've heard three or four startup chimes (if you hear any). After the chimes, release those keys and immediately press the c key to force the PB to try to start up from the CD. Any luck? If the CD isn't a bootable one, of course there's no point in trying this step.
I tried restarting in the firmware mode (command, option, O, F), no help.
I don't know anything about that, so I'm no help with it either.
Before the black screen problem I noticed the battery would run down to zero overnight when the lid was closed and computer was sleeping. I'm not sure this is normal.
Definitely NOT normal, and this is undoubtedly a clue to what's wrong. Something is allowing the battery to drain when it shouldn't. (Batteries, actually, since the backup battery will also drain completely within 10-15 minutes after the main battery, if no AC adapter is connected.) This strongly suggests a short circuit to me. But tell me: do you always leave the Powerbook sleeping on battery power overnight, without the AC adapter connected? Or does the battery drain even with the adapter connected? That would point to a fault in the adapter or in the charging circuitry inside the Powerbook.
A short circuit might leave marks on the surfaces that are coming into contact and shouldn't be. Check the inside of the bottom panel, the logic board surface components, the underside of the keyboard, and whatever else you can see for visible signs of shorting. If you can see that something has been shorting against the inside of the bottom panel, as has occasionally been reported here, cover the affected spot with a small piece of electrical tape to insulate it. Tighten all visible screws — you'll need Phillips #0 and Torx #8 drivers. Look for empty screw holes: a screw wandering around loose inside could cause untold damage.
My AC adapter appears to work fine, it, like the battery, is only a couple of months old. Thing ringlight shows normally.
By "normally," do you mean orange while charging, green when the battery is fully charged, and never flashing, red, or off? That's what normal is.
If you haven't tried to recharge your internal backup battery as described in step 6 of the "Testing Backup Battery" article I linked above, do. Of course you won't be able to see or set the date and time or verify that the battery has been charged, but you can at least do what is supposed to charge it and hope for the best. Again, if it is discharged and hasn't been recharged in the course of all your machinations so far, everything else you do is doomed to fail until it gets recharged.
If after that nothing has changed, you might try disconnecting the backup battery from the logic board. Doing so will sometimes allow a PB to start up that has been prevented from doing so by a stone-dead backup battery. Consult the iFixit Guide for your particular Tibook model to find out exactly where the backup battery connector is in it. In my 1GHz Tibook, it's a small white connector under the right-hand Shift key, with red, white and black wires attached.
If none of this helps, I'm afraid you're due for a trip to the repair shop.

Fans running full blast and CPU

Hi,
I have a late 2003, early 2004 dual 2.0 ghz G5,1 gig ram running OS x 10.4.7. Everything has been fine up until a few weeks ago the fans started running at full speed when the system was on, no variation, just full speed. I ran the hardware test disc and I get the following error, 28 seconds into the test,----2SAM/1/3:CPU B AD 7417 AD4 post/2176/0---
I have talked to a service centre close by and they have told me that the CPU is bad and needs replacemwnt to correct the fan problem. Everything runs normally as it used to, sleep, wake, all function fine. Do I need a new CPU or is their something else causing the problem??

Hi DS,
Thank you for your quick reply and insight.
I do not have the full version of Hardware Monitor as of yet, just ordered it tonight so will have it very soon and then will be able to have full info. The demo version gives me the following info.
1) CPU A die temp--28.8 degrees celsius
2) CPU B Die Temp--29.1 degrees "
3) Drive Bay-------24.0 degrees "
4) Main Logic Board air inlet---24.0 degrees "
5) Main Logic Board ambient--27.6 degrees "
6) Main logic board backside--27.0 degrees "
7) Memory controller heatsink--31.8 degrees "
8) Processor Card A Ambient---26.5 degrees "
9) Processor Card B Ambient---26.0 Degrees "
10) Smart Disc Temp----26.0 degrees"
This is after the system has been running for the better part of an hour with the room temp. at 65 degrees Fahenheight. Programs running at the same time that these temperatures where taken are as follows-- Quark express, Garage Band, Aperature, MS word, Illustrator 10,Firefox, Filemaker Pro. With all those programs running activity monitor for CPU reads as follows--
% user--3.5
% system--2.0
% nice--O
% idle---94.5
System memory shows as having 330 mb free at the same time
Fan speed is a constant " turbo" sound, no variation in speed or sound, very loud.
It would seem that as you have suggested that I am getting a false reading from the Apple Hardware test as all readings seem to OK.What do you suggest that I try to do to bring the fan speed down to a normal level? It would seem that the dual CPU's are OK and that something else is causing the problem?? Would you agree? Appreciate any help that you can suggest.
Thanks Much
Machine is a 2.0 ghz ,dual processor G5, I gig memory, ATI video, model #-M9032ll/A, late 2003, early 2004 production.

My macbook pro is lagging, freezing, and fan runs at full blast. How can I fix it?

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MacBook Pro (13-inch, Mid 2010) (Verified)
MacBook Pro - model: MacBookPro7,1
1 2.4 GHz Intel Core 2 Duo CPU: 2 cores
4 GB RAM
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NVIDIA GeForce 320M - VRAM: 256 MB
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OS X 10.9.4 (13E28) - Uptime: 0 days 0:15:23
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OCZ-AGILITY4 disk0 : (256.06 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted>: 209.7 MB
Untitled (disk0s2) / [Startup]: 255.07 GB (21.57 GB free)
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HL-DT-ST DVDRW GS23N
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Apple Inc. Built-in iSight
Apple Internal Memory Card Reader
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Computer, Inc. IR Receiver
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Mac App Store and identified developers
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[not loaded] com.Perfect.Driver.SystemAudioRecorder (1.0.0 - SDK 10.9) Support
[not loaded] com.squirrels.airparrot.framebuffer (3 - SDK 10.8) Support
[not loaded] com.squirrels.driver.AirParrotSpeakers (1.8 - SDK 10.8) Support
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Problem System Launch Daemons: ?
[failed] com.apple.ucupdate.plist
Launch Daemons: ?
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[not loaded] com.adobe.SwitchBoard.plist Support
[not loaded] com.bombich.ccc.plist Support
[not loaded] com.google.keystone.daemon.plist Support
[not loaded] com.microsoft.office.licensing.helper.plist Support
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Launch Agents: ?
[not loaded] com.adobe.AAM.Updater-1.0.plist Support
[not loaded] com.adobe.CS5ServiceManager.plist Support
[not loaded] com.citrix.AuthManager_Mac.plist Support
[not loaded] com.citrix.ReceiverHelper.plist Support
[not loaded] com.citrix.ServiceRecords.plist Support
[not loaded] com.divx.dms.agent.plist Support
[not loaded] com.divx.update.agent.plist Support
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[not loaded] com.hp.messagecenter.launcher.plist Support
[not loaded] com.parallels.desktop.launch.plist Support
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[not loaded] com.parallels.vm.prl_pcproxy.plist Support
User Launch Agents: ?
[not loaded] com.divx.agent.postinstall.plist Support
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User Login Items: ?
Battery Time Remaining
Dropbox
Google Drive
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DirectorShockwave: Version: 12.0.7r148 - SDK 10.6 Support
o1dbrowserplugin: Version: 5.4.2.18903 Support
Google Earth Web Plug-in: Version: 6.1 Support
Default Browser: Version: 537 - SDK 10.9
OfficeLiveBrowserPlugin: Version: 12.3.6 Support
OVSHelper: Version: 1.1 Support
Silverlight: Version: 5.1.30514.0 - SDK 10.6 Support
FlashPlayer-10.6: Version: 14.0.0.145 - SDK 10.6 Support
DivXBrowserPlugin: Version: 2.2 Support
Flash Player: Version: 14.0.0.145 - SDK 10.6 Outdated! Update
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CitrixICAClientPlugIn: Version: 11.8.2 - SDK 10.7 Support
googletalkbrowserplugin: Version: 5.4.2.18903 Support
AdobePDFViewer: Version: 10.0.1 Support
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SharePointBrowserPlugin: Version: 14.4.3 - SDK 10.6 Support
JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Check version
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BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
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      0% SystemUIServer
      0% PluginProcess
      0% com.apple.WebKit.Networking
Top Processes by Memory: ?
213 MB Safari
152 MB com.apple.IconServicesAgent
78 MB Dock
66 MB PluginProcess
66 MB CalendarAgent
Virtual Memory Information: ?
318 MB Free RAM
1.64 GB Active RAM
1.38 GB Inactive RAM
421 MB Wired RAM
240 MB Page-ins
0 B Page-outs

Remove Growl, DiVXHTML and other DIVX software (use MPEG4Streamclip or Smartconverter or Wondershare Videoconverter for videos you need to convert for your own use, and not for giving to others unless you own the copyright for it). Update your Adobe Flash from http://www.adobe.com/
Shut down Parallels except when you need to use. Disable Citrix and your File Sharing for VPN or remote access for Citrix except for when you use remote access. Find out how to remove Peerguardian. The Mac has its own firewall which blocks all except ping attacks through Apple menu -> System Preferences -> File Sharing. Use a hardware router to block ping attacks. Parallels has its own built-in networking firewall for Parallels itself.
This tip may uncover other slowdowns: https://discussions.apple.com/docs/DOC-6921

Ix4-300 fan keeps running full blast and the NAS never comes online

When I turn on the ix4-300 after a couple of seconds its fan starts running full blast but the NAS never comes online. The NAS lcd was damaged in the move so I don't know what is going on, it was working fine for a couple of weeks (with the damaged lcd) but this started happening a few days ago. Things that I've tried:
Used the other ix4-300 (I've 2) with the faulty NAS... same result
Let the NAS run with full FANS for 4 plus hours ......, Still didn't come online
Also both the blue and white light are constant .... no blinking whatsoever.
Any ideas ...
Solved!
Go to Solution.

It could be the device itself. Is it covered by the warranty?
Are you concerned about retrieving the data or do you just want the device back up and running properly?
If you are not concerned about data, you can try the following procedure at your own risk:
Power down the device and reseat all the drives in the device. Power the device back on.
If this doesn’t allow unit to boot, continue with below process.
   1. Turn off the device and pull out all the drives.
   2. Place any other drive 2, 3 or 4 in the first slot and boot up the device.
   3. Wait for sometime as the boot-up process can be slow.
         a. If it doesn’t boot, try another disk in slot 1.
   4. If it boots up correctly, insert another disk in slot 2.
        - Check UI for disk detection.
        a. If second disk is detected, turn it off, place disk 3 and 4 in unit and boot up.
        b. If it doesn’t boot-up correctly, remove 3 or 4 and retry. You may need to try to determine if 3 or 4 is bad in this case.
   5. Recreate the volume if it doesn’t start regenerating automatically
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My MacBook Air 13' (2013) will occasionally start the fan at full blast, not connect to any wifi or detect any wifi, and will remove the battery icon from my menu bad as well as tell me there is no battery connected. How do I fix this?

My MacBook Air 13' (2013) will occasionally start the fan at full blast, not connect to any wifi or detect any wifi, and will remove the battery icon from my menu bad as well as tell me there is no battery connected. How do I fix this? I have restarted my computer multiple times, **** it down, and ran a diagnostic test to tell me nothing is wrong and my computer is not running any applications. There is no reason for the fan to be on full blast! when I try to set the option to show my battery icon in the menu bar, it will automatically uncheck. How do I fix all of this?

Have you tried SMC and PRAM resets?
http://support.apple.com/kb/HT3964
http://support.apple.com/kb/ht1379
Ciao.

2.3 G5 Crashes and Fans Running Full Blast

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