Fans running out of control

Have had my PowerMac G5 for just over a year. Rebooted yesterday and the fans started running full out and haven't stopped since.
Here are somethings that I have tried:
Reset PRAM
Press Power Manager Button on the logic board
Ran Applejack
Repaired permissions
Unplugged computer
Ran HW test
Deleted Energy Saver Preferences
Playe with Energy Saver Preferences
Run 'top' and confirmed that no processses are running wild
All to no benefit.
I now have a shareware utility installed called "Hardware Monitor" which reports:
CPU A Die Temp is 104 F
CPU B Die Temp is 84 F
Drive Bay: 77 F
Logic Board Inlet: 72
Logic Board Ambient: 74
Logic Board Backside: 84 F
Memory Controler Heatsink: 106 F
Processor Card A Ambient: 86 F
Processor Card B Ambient: 86 F
I have not used this utility before so I don't know whether these readings are in the normal range.
Otherwise the machine is operating normally. But I guess I am sensative to noise as I am unable to think clearly with the rush of the fans.
Anyone have anything further I should try?
I am covered by Apple Care I believe but really need the machine to get work done and don't want to have to take it in for repair if I can help it...
I have to suspect that it is a problem with a sensor at this point or some other hardware problem.

OK so I tried a couple more things outline above:
booted from OSX install CD (fans still racing)
ran Disk Repair from CD
ran Permissions Repair from CD
unplugged all cables except mouse and keyboard
let it 30 minutes unplugged and then reset mother board power button
All with no improvement.
When I pull the clear panel from the side the red light goes on inside the case, when I put it back the red light goes out, so I don't think that particular sensor is broken. The fan speed does not change discernably.
Still wondering if anyone has any temperature data I can compare to mine. There's a 20 F degree difference between my two processors for instance. Anyone else have anything like that?

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          34% WindowServer
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    | | | "location" = "Hard Drive"
    | | | "target-value" = 1800
    | | | "location" = "sysclk slew"
    | | | "target-value" = 1
    The CPU is running at an average load of 26.1% and is at 144.3 degrees, with no out of control processes, and the hard drive is at 125.6 degrees. That's with only 5 applications running.
    I'm running OS 10.4.3 and the iMac has 2 gigs of RAM. I've run the Apple Hardware Test disk, which reported no problems, and have run an overnight memory test, which also reported no problems and have reverted back to the Apple supplied memory with no positive effect.
    I've also (several times):
    • reset the SMU (PMU for older Mac fans)
    • cleared the PRAM
    • run disk utility
    • repaired the permissions
    • done a clean software install
    Nothing has worked. This is all on a computer whose firewire didn't work out of the box and which I repaired with a refurbed motherboard when it was less than a week old. Nothing like buying a new machine and getting a refurbished one to start you off on the right foot.
    Now I'm trying to get this computer, which is under warranty, repaired but can't even find a number that I can call where I won't get charged! I live in Maine, so taking it to an Apple Store, or even a convenient service center is out of the question. Can someone advise?
    This has been, without a doubt, my most disappointing Apple experience ever (and I owned a Mac Portable!)

    Timothy,
    I'm certainly open to another member's disagreement on this, but It appears to me that you have done everything necessary to disqualify software as the cause of your fan issue.
    In that case, it's probably worth it to you to go ahead and give Apple your credit card to enable phone support for this issue, as it appears likely to be hardware related, which will cost you nothing (they should only charge you if it turns out to be a software issue.
    Phone support will go down a list of things that you need to do to disqualify software, all of which, I believe, you've already tried. The only risk would be if phone support comes up with a software fix that no one on this board thinks to recommend to you. However, on the bright side, if no one on here can come up with another idea to try, and phone support has one that does work, it's going to be worth the cost, what is it - $75, I think?
    I suppose your alternatives would be to:
    1. buy some books or an AppleCare repair course and become an expert,
    or
    2. buy AppleCare and get free phone support back for both software and hardware for another two+ years, as well as valuable rights to in-home repairs.
    If you have seen your iMac run well at times, and can see keeping it, AppleCare at $169 could be a bargain for what you might get out of it in phone support alone, not to mention another expensive part replacement a year from now. Furthermore, there are times it can be found at a lower price on eBay, usually a bit under $100 delivered. I have bought several, for this one I'm using, for a 17" that I sold, plus as a gift for a relative's iMac.
    Best of luck.

  • Warcraft and out-of-control fans?

    My 13-year old son spends a lot of time on our iMac 5 playing World-of-Warcraft—too much in fact, but that's another issue.
    Anyway, I've noticed that sometimes I'll walk into the room when he's playing and the iMac sounds like it's going to take off. In the past, the only way I could fix the out-of-control fans was to completely reinstall Mac OS X—a little extreme I know. I suspect that Warcraft is corrupting something—perhaps the PRAM, NVRAM, or something else. I know how to reset the PRAM, but I think resetting the NVRAM involves using the Terminal and I can'y find the instructions on how to do that.
    Does anyone know what causes this and how it can be fixed. Other than this problem, our iMac runs great! Here are the system specs:
    iMac G5 20" 2GHz
    1 GB DDR SDRAM
    Mac OS 10.4.8
    250 GB HD (195.35 available)
    Thanks,
    Kelly

    31337 H4X00R, which model/generation G5 iMac do you have? Please include the info in your system preferences.
    http://docs.info.apple.com/article.html?artnum=301724-en How to identify your iMac
    http://docs.info.apple.com/article.html?path=Mac/10.4/en/mh355.html Getting information about your computer
    See if the following Knowledge Base Article is of any help:
    http://docs.info.apple.com/article.html?artnum=301733 iMac G5: How to Reset the SMU (iMac G5, the iMac G5 (Ambient Light Sensor), and the iMac G5 (iSight)).
    After playing games, see if repairing permissions helps in any way. I always do after playing games wheither they are online games, installed from the CD or games that I played directly from the CD.

  • Weird beeping/blinking. After reseting SMC the fan/battery is out of control.

    I honestly just got my MacBook Pro back from the shop yesterday (it got a new harddrive) and the first time I let it run out of battery life, this happens.
    So basically what's going on is that I cannot start up my computer unless I reset the SMC. When the beeping/blinking (it was the one beep/per second type) first started about an hour ago I immeditely reseted the SMC and that seemed to work... until, that was, the fans would not stop blaring and the battery is not showing up. Therefore, as soon as I unplug my charger my computer loses all power and goes right back to that single beep, therefore I have to reset the SMC again and the battery is still not showing up, cursing me to live out this day in and day out.
    Is there anything I can do? I'm getting sick of resetting the date.

    when you pay for a repair, it comes with a warranty, typically 90 days. Take it back to the people who touched it last and ask them to make sure it is working properly before returning it to you.
    It is possible that a new problem has occurred, and that the timing is just unfortunate. But let them explain it.

  • MBP battery crapped out, now fan running loudly

    While I am waiting for my replacement MBP battery (which I ordered yesterday) it looks like my current battery finally crapped out, as my computer shut down again automatically last night while I was on a plane and I'm getting a big "X" where the battery charge indicator is located. This appears to have caused my fan to run at a higher rate or something of that nature because the fan is now very constant and loud. Everything else on the computer seems to be working fine however, so long as I am plugged in. The question is, is it OK to be using the MBP with the fan running like this until the replacement battery comes in, or should I try to change to setting on the fan? And when I get the new battery in, will THAT make the fan go back to normal?

    I do think it's normal. Keep in mind that batteries vary - the "health" is determined with a nominal value as the denominator (5500 mAh for a 15" MBP, which is actually rounded down from the calculated full charge capacity of a new battery, 5555 mAh), but the actual full charge capacity of a new battery varies within a range around that nominal value. So, if you happen to get a battery with a full charge capacity higher than 5500 mAh, iStat or CoconutBattery will report your health as 100% for some time, even though the full charge capacity is dropping - you started from >100%, but the utilities will just show 100%, not a value like 107% even if your battery started with a capacity of 5900 mAh.
    The bottom line is that a rechargeable battery starts with a certain capacity, and over time that capacity can only decrease. The decrease is non-linear, and how rapidly it decreases is influenced by a variety of conditions (charging pattern, temperature, etc.).

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