Yosemite and fan running

I have a late 2009 Imac and since the Yosemite install, the fan runs on high constantly. I have checked the Activity Monitor, and closed everything and opened one by one to see if I could diagnose the issue. It doesn't matter what I have open, it runs all the time. In sleep mode, it stops running. I have the creative suite, Office, and just the normal software loaded, nothing out of the ordinary. This computer is maxed out on memory and storage, I have an external drive for back up. I tried to make sure everything else is upgraded as well. The fan in this computer was replaced in November of 2013, as well as the hard drive which was on recall.
This computer is very well taken care of, and was running excellent up to this point.
I tried the unplug, unhook all the peripherals, and other things i found on google search. Is it just me, or is this happening to others and does anyone have another idea?
Thank you!

Four things for you to do:
Resetting your Mac's PRAM and NVRAM
Intel-based Macs: Resetting the System Management Controller (SMC)
Boot the computer into Safe Mode then reboot it normally. Safe mode startup is slower than usual, but that is normal. If this doesn't help, then;
Create a new admin user account in Users & Groups preferences. Be sure you disable Automatic Login if you use it. Restart the computer. At the login screen select the new account you just created. Does this help?

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I upgraded to Yosemite and computer running very slow. It is an older iMac 2009. Thinking of downgrading os or upgrading ram unless there is something else I can try?

I upgraded to Yosemite and computer running very slow. It is an older iMac 2009. if I cant get it running faster I will have to downgrade os or upgrade ram. Is there something else I can try? Here is scan of computer:
Problem description:
computer Very slow after upgrading to OS Yosemite
EtreCheck version: 2.0.11 (98)
Report generated November 15, 2014 at 3:50:50 PM MST
Hardware Information: ℹ️
iMac (20-inch, Early 2009) (Verified)
iMac - model: iMac9,1
1 2.66 GHz Intel Core 2 Duo CPU: 2-core
2 GB RAM Upgradeable
BANK 0/DIMM0
1 GB DDR3 1067 MHz ok
BANK 1/DIMM0
1 GB DDR3 1067 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
NVIDIA GeForce 9400 - VRAM: 256 MB
iMac 1680 x 1050
System Software: ℹ️
OS X 10.10 (14A389) - Uptime: 4 days 4:38:8
Disk Information: ℹ️
Hitachi HDT721032SLA380 disk0 : (320.07 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted> : 210 MB
Macintosh HD (disk0s2) / [Startup]: 319.21 GB (201.09 GB free)
Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
OPTIARC DVD RW AD-5670S
USB Information: ℹ️
Apple Inc. Built-in iSight
Apple Inc. Keyboard Hub
Apple Inc. Apple Keyboard
USB Reader USB Mass Storage Device 31.67 GB
S.M.A.R.T. Status: Verified
NO NAME (disk1s1) /Volumes/NO NAME : 31.67 GB (27.49 GB free)
Apple Computer, Inc. IR Receiver
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller
Gatekeeper: ℹ️
Mac App Store and identified developers
Kernel Extensions: ℹ️
/Applications/Toast 11 Titanium/Spin Doctor.app
[not loaded] com.hzsystems.terminus.driver (4) Support
/Applications/Toast 11 Titanium/Toast Titanium.app
[not loaded] com.roxio.TDIXController (2.0) Support
/System/Library/Extensions
[not loaded] com.Huawei.driver.HuaweiDataCardDriver (4.0.6) Support
[not loaded] com.roxio.BluRaySupport (1.1.6) Support
[not loaded] com.sony.driver.prs (1.0.1d1) Support
Startup Items: ℹ️
HWNetMgr: Path: /Library/StartupItems/HWNetMgr
Startup items are obsolete and will not work in future versions of OS X
Problem System Launch Agents: ℹ️
[failed] com.apple.accountsd.plist
[failed] com.apple.AirPlayUIAgent.plist
[failed] com.apple.bird.plist
[failed] com.apple.CalendarAgent.plist
[failed] com.apple.CallHistoryPluginHelper.plist
[failed] com.apple.CallHistorySyncHelper.plist
[failed] com.apple.cloudd.plist
[failed] com.apple.coreservices.appleid.authentication.plist
[failed] com.apple.coreservices.uiagent.plist
[failed] com.apple.EscrowSecurityAlert.plist
[failed] com.apple.icloud.fmfd.plist
[failed] com.apple.iconservices.iconservicesagent.plist
[failed] com.apple.nsurlsessiond.plist
[failed] com.apple.pbs.plist
[failed] com.apple.pluginkit.pkd.plist
[failed] com.apple.printtool.agent.plist
[failed] com.apple.scopedbookmarkagent.xpc.plist
[failed] com.apple.secd.plist
[failed] com.apple.security.cloudkeychainproxy.plist
[failed] com.apple.spindump_agent.plist
[failed] com.apple.telephonyutilities.callservicesd.plist
Problem System Launch Daemons: ℹ️
[failed] com.apple.AssetCacheLocatorService.plist
[failed] com.apple.awdd.plist
[failed] com.apple.cache_delete.plist
[failed] com.apple.coresymbolicationd.plist
[failed] com.apple.ctkd.plist
[failed] com.apple.diagnosticd.plist
[failed] com.apple.iconservices.iconservicesagent.plist
[failed] com.apple.iconservices.iconservicesd.plist
[failed] com.apple.ifdreader.plist
[failed] com.apple.MobileFileIntegrity.plist
[failed] com.apple.nehelper.plist
[failed] com.apple.nsurlsessiond.plist
[failed] com.apple.periodic-daily.plist
[failed] com.apple.periodic-weekly.plist
[failed] com.apple.sandboxd.plist
[failed] com.apple.softwareupdate_download_service.plist
[failed] com.apple.softwareupdated.plist
[failed] com.apple.spindump.plist
[failed] com.apple.sysmond.plist
[failed] com.apple.tccd.system.plist
[failed] com.apple.wdhelper.plist
[failed] org.cups.cupsd.plist
Launch Agents: ℹ️
[not loaded] com.adobe.AAM.Updater-1.0.plist Support
[loaded] com.adobe.AdobeCreativeCloud.plist Support
[not loaded] com.sony.ReaderLibrary.RunReaderLibrary.plist Support
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist Support
User Launch Agents: ℹ️
[loaded] com.adobe.AAM.Updater-1.0.plist Support
[loaded] com.adobe.ARM.[...].plist Support
[loaded] com.adobe.ARM.[...].plist Support
[loaded] com.google.keystone.agent.plist Support
User Login Items: ℹ️
iTunesHelper Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
HP Registration Assistant UNKNOWN (missing value)
Reader Library Launcher ApplicationHidden (/Library/Reader Library/Reader Library Launcher.app)
HP Scheduler Application (/Library/Application Support/Hewlett-Packard/Software Update/HP Scheduler.app)
Internet Plug-ins: ℹ️
Default Browser: Version: 600 - SDK 10.10
OfficeLiveBrowserPlugin: Version: 12.3.6 Support
net.juniper.DSSafariExtensions: Version: (null) Support
AdobeAAMDetect: Version: AdobeAAMDetect 2.0.0.0 - SDK 10.7 Support
FlashPlayer-10.6: Version: 15.0.0.223 - SDK 10.6 Support
AdobePDFViewerNPAPI: Version: 11.0.0 - SDK 10.6 Support
Silverlight: Version: 5.1.30514.0 - SDK 10.6 Support
Flash Player: Version: 15.0.0.223 - SDK 10.6 Support
QuickTime Plugin: Version: 7.7.3
iPhotoPhotocast: Version: 7.0
NP_2020Player_IKEA: Version: 5.0.94.0 - SDK 10.6 Support
AdobePDFViewer: Version: 11.0.0 - SDK 10.6 Support
User Internet Plug-ins: ℹ️
BrowserPlus_2.9.8: Version: 2.9.8 Support
fbplugin_1_0_3: Version: (null) Support
3rd Party Preference Panes: ℹ️
BrowserPlus Support
Flash Player Support
Perian Support
Time Machine: ℹ️
Time Machine not configured!
Top Processes by CPU: ℹ️
     7% syncdefaultsd
     0% launchservicesd
     0% launchd
     0% systemstatsd
     0% SystemUIServer
Top Processes by Memory: ℹ️
126 MB HP_Officejet_4620_series
30 MB Finder
28 MB ScreenSaverEngine
24 MB mds
24 MB WindowServer
Virtual Memory Information: ℹ️
25 MB Free RAM
344 MB Active RAM
333 MB Inactive RAM
337 MB Wired RAM
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could the launch agents failing slow the computer or they just don't work. I mean I am willing to upgrade ram but not if there is good chance it won't change speed much. Also to downgrade is it necessary to format the hard drive?

Early 2008 MacBookPro keyboard backlight off and fans run at high speed

Hi!
I wrote from Turkey.
My Early 2008 MacBookPro 2.40 ghz 4 gb Ram OSX Mavericks machine's keyboard backlight off and fans run at high speed; it seems an exact smc resetting problem.
So i tried the 2 ways of SMC restting procedure; both battery you can move and not, but nothings changed on the situation..
On the way for removable battery; nothing changed but on the way for umremovable battery way; keyboard backlight flashes and gone, but fans are at high speed not changed. So nothing changed.
What can i do right now? i'll wait for your advices
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Your Mac may need a new PRAM battery. Once it is over 4 years old, that often is needed.

3 tones and fan running

G5Imac had 3 tones and fan running at start up. Now it will start and the fan starts immediatly. Also had a few kernal panics prior. help!

Hi Miriam ,
Thanks so much for your info on my Imac. I took out the ram and reseated them. I had 256 on top and 512 on bottom,. I removed the completely and put them back in . The problem was sorta solved but now its doing the kernel panic thing again.And once I got a black screen that flashed something re; Darwin? Should I buy a 512 for the top slot? I heard that the top and bottom memory should match. Also thank you for the info on the extension program. It has already been in the shop for the power issue.
imac g5 Mac OS X (10.4.9)

Battery discharging and fan running constantly after upgrading to Yosemite

MBP Early 2011. Just got back a month ago from Apple Support for video related issue. Almost EVERYTHING was replaced (logic board, video, ram, battery, cdrom, even my dented case. Thank you Apple!). Has run for a month flawlessly on Mavericks. Upgraded to Yosemite 48 hours ago. Light on magsafe stays green. Battery indicator icon states Battery is not charging (currently at 75% and falling). Power source: Power adapter. While plugged in and operating, battery is discharging and fan constantly running. If I shut down, mag safe light turns yellow and battery will charge to 100%. If left plugged in and running in Yosemite, battery will drain all the way down.
Have tried:
Rebooting, putting into sleep mode, shutting down completely, unplugging and replugging power supply from wall and MBP while on and off, resetting SMC with Shift Control Option Power keys/buttons.
No third party battery or power apps installed, fresh load of Mavericks from factory when I got it back. This feels like something with the new energy management in Yosemite isn't working as expected to me. Thoughts & suggestions appreciated!

UPDATE: Resolved!
Disabled all login items but problem persisted on normal boot. Resetting SMC and PRAM had no effect. After booting into Safe Boot, problem did not exist. Looked in console logs and saw this right as problem started to occur:
10/20/14 6:49:07.004 PM com.apple.xpc.launchd[1]: (com.gspy.MO3V2Daemon[93967]) Could not find and/or execute program specified by service: 2: No such file or directory: /Library/MO3V2/MO3V2Daemon.app/Contents/MacOS/MO3V2Daemon
This pertains to the Steelseries WoW MMO gaming mouse. Ran the uninstall.command from Applications for this mouse software and rebooted. Fixed.
Light on MagSafe connector is orange, battery shows as charging, fan is not running constantly. I can't begin to understand how this would effect the battery charging functions but, after uninstalling this, the problem was resolved. Hope this will help someone else.

Yosemite update - fan running constantly

Hi
I have a macbook pro retina - less than a year old. Has been working great, but right after updating to Yosemite - the fan began running constantly on high. It doesn't stop even during sleep (only when shutting down the computer completely). I am not a computer expert - but I did reset the SCM and PRAM and nothing helped. I looked at the CPU, and one thing I noticed is that everything seems to use low percentage, except idling %, which is constantly on 80-99%. Any suggestion on what this might be about, and how to fix it? I'm worried about my

Hello gooli1074,
It may help to reset your MacBook Pro's SMC and PRAM.
Intel-based Macs: Resetting the System Management Controller (SMC)
http://support.apple.com/kb/HT3964
Reset your computer’s PRAM
http://support.apple.com/kb/HT1379
Cheers,
Allen

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

When I start up my 2010 Macbook Pro now, the fan starts running as soon as the spinning gear appears below the apple logo, the boot up is insanely slow, the mouse doesn't track well with my trackpad movements, and trying to open programs often leads to a non-responsive program with the pinwheel of death spinning for minutes at a time. I try to shut it down (takes approx. 20 min. now) and when the screen goes black, the fan continues full blast. After that I can boot up the computer and it runs normally, but the whole process takes about 50 minutes longer than it should, especially with a relatively new SSD (~ 8 months old). Has anyone seen anything like this before or does anyone know how to fix it?
It loads well enough in safe boot, and I've tried cutting out most of the apps that launch at startup with poor results. I've also tried resetting the SMC with equally poor results. I need help!
Here's my Etresoft report as well.
EtreCheck version: 1.9.15 (52)
Report generated August 27, 2014 at 10:51:10 AM MDT
Hardware Information: ?
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
Video Information: ?
NVIDIA GeForce 320M - VRAM: 256 MB
System Software: ?
OS X 10.9.4 (13E28) - Uptime: 0 days 0:15:23
Disk Information: ?
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)
Recovery HD (disk0s3) <not mounted>: 784.2 MB
HL-DT-ST DVDRW GS23N
USB Information: ?
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
Apple Inc. Apple Internal Keyboard / Trackpad
Configuration files: ?
/etc/hosts - Count: 49
Gatekeeper: ?
Mac App Store and identified developers
Kernel Extensions: ?
[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
[not loaded] xxx.qnation.PeerGuardian (1.1.9) Support
Problem System Launch Daemons: ?
[failed] com.apple.ucupdate.plist
Launch Daemons: ?
[not loaded] com.adobe.fpsaud.plist Support
[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
[not loaded] com.parallels.desktop.launchdaemon.plist Support
[not loaded] xxx.qnation.PeerGuardian.kextload.plist Support
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
[not loaded] com.google.keystone.agent.plist Support
[not loaded] com.hp.messagecenter.launcher.plist Support
[not loaded] com.parallels.desktop.launch.plist Support
[not loaded] com.parallels.DesktopControlAgent.plist Support
[not loaded] com.parallels.vm.prl_pcproxy.plist Support
User Launch Agents: ?
[not loaded] com.divx.agent.postinstall.plist Support
[not loaded] com.spotify.webhelper.plist Support
User Login Items: ?
Battery Time Remaining
Dropbox
Google Drive
Internet Plug-ins: ?
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
iPhotoPhotocast: Version: 7.0
CitrixICAClientPlugIn: Version: 11.8.2 - SDK 10.7 Support
googletalkbrowserplugin: Version: 5.4.2.18903 Support
AdobePDFViewer: Version: 10.0.1 Support
QuickTime Plugin: Version: 7.7.3
SharePointBrowserPlugin: Version: 14.4.3 - SDK 10.6 Support
JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Check version
Safari Extensions: ?
DivXHTML5
AdBlock-2
HoverZoom
Facebook Cleaner (Disabled)
1-ClickWeather
Facebook Improved
Audio Plug-ins: ?
BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
AirPlay: Version: 2.0 - SDK 10.9
AppleAVBAudio: Version: 203.2 - SDK 10.9
iSightAudio: Version: 7.7.3 - SDK 10.9
iTunes Plug-ins: ?
Quartz Composer Visualizer: Version: 1.4 - SDK 10.9
User Internet Plug-ins ?
Unity Web Player: Version: UnityPlayer version 2.6.1f3 Support
3rd Party Preference Panes: ?
Flash Player Support
Growl Support
Time Machine: ?
Skip System Files: NO
Auto backup: NO - Auto backup turned off
Time Machine not configured!
Top Processes by CPU: ?
      2% WindowServer
      1% ps
      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

My MBP wouldn't start this morning, it was just stuck on white screen with grey logo and fan running. I replaced my magsafe power cord and resolved starting issue. Now I can't connect to internet and iTunes won't load??? Help?

This morning I was just getting the white screen with logo and status bar with fan running. I thought it was an issue with the power adapter so I went out and replaced it. MBP will start now, but won't connect to internet. I have full wi-fi signal. Also, when I try to launch iTunes, it just quits right away. Please help?
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Reinstall OS X without erasing the drive
1. Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install Mac OS X 10.6.8 Update Combo v1.1.

I just moved from a G5 PowerMac to a Mac Pro with one drive running Yosemite and one running Snow Leopard, Do I need Lion to be able to upgrade iPhotos

How can I see my iPhotos from a G5 PowerMac on a MacPro running Yosemite and Snow Leopard? Is Lion a more advance system that Snow Leopard?

The last iPhoto version you can run with Snow Leopard is iPhoto 9.2.4, and Yosemite needs iPhoto 9.6.
Move your photos to your Yosemite partition, if you want to use iPhoto with Photo Streams and other iCloud features.
As you are asking about Lion, you can run iPhoto iPhoto 9.2.3 or iPhoto 9.2.4 both with Lion and SnowLeopard, but there is no iPhoto version, that runs both on Yosemite and Snow Leopard, or Lion and Yosemite.

Dock consumes 100% of CPU and fan runs. What to do?

I have a 2010 MBP with SSD and VMWare (not Parallels). Every so often, the dock cranks up to consume 100% of the CPU, and the fan runs. The problem goes away when I reboot. I've tried quiting various applications, but it doesn't seem to make a difference (i.e. I cannot identify a rogue app that's causing this). There are a lot of discussion threads on this problem with OS 10.6.8 and Parallels, but I'm running Lion 10.7.1 and VMWare (which I've shut down).
Any others have this issue? Ideas for solution?

Small update: Despite my intelligence, good looks and vast experience I use Google sometimes. To my surprise this file turns out to be a Windows one. Here is someone who is much happier, and since it is some way in my line of thinking I'll quote it, but you might take my previous advice as well:
http://forums.techarena.in/windows-vista-performance/1012315.htm
"- Open up msconfig.exe > Manage startup programs.
- Disable ALL Realtek entries
- Close msconfig.exe
- Right-click on the speaker icon > Audio devices > Speakers (properties)
- Go to the enhancements tab
- Check the box to disable all audio enhancements
- Close the menu
- Right-click on the speaker icon > Recording devices
- Disable all your microphones (yeah..., the actual problem seems to come
from voice inputs rendering..)
- Close the menu
- Restart your computer"

Restart error message AND fans running

Last night when I went to bed, I found the fans running loudly on my computer and it wouldn't respond to the mouse. I did a hard shut down (held the power button down until it turned off). This morning, when I turn it back on, all I get is dark grey message saying that I need to restart the computer again by holding down the power button. Every time I restart it, the same message comes up. If I leave that screen up for a few minutes, the fans start running high again.
Also, I held Shift while it was starting up to open it in Safe Mode once. The Apple and spinning gear screen ran for a few minutes before it restarted itself and then gave me the restart message again.
I did not install anything new on my computer yesterday, so I have no idea what caused this.
FYI: I have been running Time Machine on an external drive, so I may need to reinstall the OS and restore, but I would rather know if I have some faulty hardware or why this is happening. Help, please!

Hi Mark Novak,
The 'kernel panic' you experienced suggests the problem is hardware related: http://support.apple.com/kb/HT1392. Do you have any pci cards or external devices connected? If so, remove them first and restart holding the option + command + P + R until you hear 3-chimes, then release the keys. This procedure zaps the parameter ram: http://support.apple.com/kb/HT1379.
When this doesn't help, I would hope that your problem is with RAM or the Graphics Card. Try removing and reinstalling the Graphics Card or removing all RAM but the original factory installed RAM the came with your computer. You will have to zap the parameter ram in all cases for your computer to acknowledge the changes.
Regards

Cpu and fans running at 100%

I've been working on this 20" iMac G5 for a couple weeks now and I'm stumped.
I've reset the smu, the nvram, wiped and put on a fresh install of 10.5, updated to 10.5.8 and still the computer is LOUD.
The fans run at a constant 100%, so I check the processor temp and it was 85c the instant the screen came on. So I proceeded to check the ventilation, took it all apart and all the air ways are clear, I checked, cleaned, and applied brand new thermal paste, put it all back together and still the instant the screen comes on the fans go to 100% and temp jumps to 85c
Then a student said "is it working hard?" Just to humor him I launched the activity monitor and to my surprise it was. The processor was running at 100% and the process that was doing it all is "top" running from the user 'root'.
I proceeded to type kill 321 (the pid) and the processor dropped to 10% and after about half an hour the temp was a normal 60c and the fans went quiet, but the instant I log out or reboot that 'top' process kicks back on and the machine starts over heating.
I've tried 10.4 and 10.5, wiped the HD about 5times and 'top' keeps running the processor off the deep end with every install.
I've tried permission repairs and hardware checks, even ran the full techtools deluxe scan.
I've tried finding others with this problem but it is understandably difficult to search for problems with 'top'.
It is no longer under warranty and no one is going to miss it if I just throw it out, but I don't want to give up on a 2.1Ghz machine for student use if that can be avoided.
I'm willing to try any ideas to get that process fixed, the only idea I have left is to replace the cmos battery, and prey to the computer gods, but I doubt that will do anything.

Hey there - same problm here w/ white flatscreen G5 (PPC).
Did you have any luck in solving your problem?
Thx
WP

Imac gets grey screen and fan runs hard

When I try to turn on my computer I get a grey screen with an apple and the fan runs like crazy. Sometimes I just get a grey box saying I need to reboot in several languages. Along with the fan running. Other times I get the grey box and then a bunch of text behind it with the fan running. I have tried to reinstall Leopard twice and get the same thing. Any ideas?
Jason

Hi Jason - have you tried booting from your install disc and running Disk Utility?
1. Insert the Mac OS X Install disc that came with your computer, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu. (In Mac OS X 10.4 or later, you must select your language first.)
Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
3. Click the First Aid tab.
4. Click the disclosure triangle to the left of the hard drive icon to display the names of your hard disk volumes and partitions.
5. Select your Mac OS X volume.
6. Click Repair. Disk Utility checks and repairs the disk.
If your drive has been repaired, boot from your internal and repair permissions.
You might also try resetting the PRAM

Yosemite and fan running

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