Dual 2.0 G5 Freezes and Fans go crazy - I am going crazy

It stops after one hour while installing Mac OS X prceeded by slowing processing and cursor, 30 seconds later fans kick into high gear.
The error LED - Red – # 7 lit up.
The computer stops responding occationally while installing Adobe CS2, Final Cut Pro 5. and others. Or when I leave it on for an hour, it freezes and the fans run very fast and noisy.
The log file has the following line at the end.
KernelEventAgent[37]: tid 00000000 received unknown event (12).
I have reset the PMU according to Apple Support web site – and no difference.
When I search the web site, http://docs.info.apple.com/article.html?artnum=302527 link says that we need to contact Apple service if LED light #7 is RED as my case.
It will cost me more than 300$ to send the unit back to the nearest Apple Service Centre.
There is the same question in Expert exchange - but to get answer, you have to pay and subscribe.
It seems that this problem exist for seveeral dual, quad G5s. Why can't Apple fix it and still selling those G5s. It's shameful what Apple have done to loyal Mac Users.

Nick,
I know many G5 users who never had this error. Your machine is under a year old if it is a dual-core G5. You have a hardware warranty. I would call AppleCare and tell them your predicament and see if you can avoid having to pay that fee if your machine is under a year old or under AppleCare:
http://www.apple.com/contact/phone_contacts.html
You don't necessarily have to go to the nearest Apple Center if you have an authorized service center nearby either. Though I would take this matter up with AppleCare by phone.

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    I've tried the following, with no success:
    • Reinstalled OS X 10.6 and followed the update path
    • Reset the SMC and PRAM
    • Rebooted the machine before going to bed, so that no user login process or software was running at the time of the freeze.
    What is a good process to use for debugging this problem, from this point, since the Console Logs don't give me any consistent information? Is there a way to make the Console logs more verbose?
    How can I get a list of all the maintenance processes that autostart on my machine at night? I'm assuming the problem is with a process installed by third party software, since I didn't clear the problem when I reinstalled a fresh copy of OS X.
    Thanks, in advance, for your help.

    I can't believe I missed this thread. I was sure I was the only one. This has been happening to me for months now, and of course out of warranty. I've tried so many things. Mac Pro Dual Core Intel. Fans go bananas for no discernible reason (according to Activity Monitor). I often return to an un-wakeable display despite the fans going full blast. Sometimes while I'm working, the thing just puts itself to sleep and doesn't want to wake up. Several times a week, the system hangs. (There's usually nothing complicated being done, although using iPhoto is pretty much guaranteed to freeze everything.) Almost always takes more than one hard restart in a row to get it back up, sometimes a DOZEN or more. Have no idea whether attempting a safe boot helps reduce the number of tries but it seems to. It's set never to sleep; I've reset the SMC and PRAM and deleted video preferences (see http://support.apple.com/kb/HT1573). The issue pre-dated installing Snow Leopard and was unchanged by it.
    By the way, the computer is at its most silent now - 600rpm each on power supply and exhaust fans, and 500 each on CPU and expansion according to iStat - and it's still pretty loud. Anyone else have that issue?

  • PowerMac G5 Dual 2.5 - Only Boots with Side Cover and Fan Guard OFF!!

    I have the strangest problem with my PowerMac G5 Dual 2.5.  This has been my Pro Tools rig forEVER.
    At some point early last year, my Mac wouldn't boot.  It would not see the hard drive, and would show that dreaded alternating icon in the middle of the screen indicating as much.  I tried resetting, tried power off/on, tried resetting PRAM.  Nothing.  I took the cover off, and fan guard off to get at the hard drive.  Verified the data and power cable were seated in hard drive.  Cover still off, I booted up the system.  Voila!!!  Booted right up like nothing was ever wrong.  I put the cover back on, and went about my business, passing it off as a one-off power glitch (the power in my house ***** rocks).  Next time I rebooted the Mac, the exact same thing happened. 
    I can repeat this at will.  If I leave the cover on, the system will not ever, ever boot.  The minute I take the cover and fan guard off, causing the fans to spin at max speed when turned on, the system boots without issue.  So, I reset PRAM and PMU.  I even tried replacing that green/white cylindrical battery on the motherboard.  Reseated power/data cable on hard drive.  ****, I even tried a different hard drive and memory (explained below).  No change. 
    Since then, I have relegated this system to the emergency backup system, and procured Dual 2.7 G5 PowerMac.  I transferred the pro tools cards, hard drive (without formatting it) and memory (8 GB) to this new 2.7, and have not had a single, solitary issue with it.  So, I know it's not the hard drive, memory, OS install, or Pro Tools cards.
    What in the name of the Apple Gods could be causing this issue?  Any ideas at all?

    Hi Chris,
    Good info & work so far, but indeed strange, only thing I can think of is something to do with that little switch for the fan cover... near the bottom as I recall, but it may be some kind of short in it's circuit.

  • I made a dual boot of windows 7 and mac os x lion in my macbook pro .i installed m icrosoft support software also. now, can i install windows updates? do i turn on the automatic updating of updates? does hot fix of microsoft helps in stop freezing?

    i made a dual boot of windows 7 and mac os x lion in my macbook pro .i installed m icrosoft support software also. now, can i install windows updates? do i turn on the automatic updating of updates? does hot fix of microsoft i.e, " support.microsoft.com/kb/979491" helps in stop freezing in dual boot mechanism?

    Windows has a software updater built into Windows and when you install the Boot Camp drivers then it will install an Apple software updater also. I believe Windows is set to automatically download and install your updates as does the Apple software Updater. They both will update the individual files it needs to periodically.
    "Microsoft updates" and "Windows updates" are basically the same thing in Windows. Are you talking about the "Windows support software" when downloading from Boot Camp Assistant? Apple installs a software updater for it's Boot Camp drivers in Windows 7 so you can do it manually or automatically.
    The "Hot Fix" your referring to is only for certain motherboards built from other Windows only computer manufacturers and does NOT pertain to any Apple computers.
    If you have a problem with your computer then it's best to ask a specific question so we can help better.

  • Temperature and Fan speed? screen freeze

    I Have 2011 MacBook Pro 13inch . I was having the screen freeze issue from a hot graphics card it cpu that so many others have with this year macbook. After a night of playing videos (not realizing it was in loop) connected to my hd tv using thunderbolt. After the first one it happened a few more time after playing any video for a few minutes. Screen freeze with little pixelated boxes, yellow or blue. After some research I reset SMC and seems sit of fixed it. I am not running SMC FAN AND Temperature Monitor apps and my fans run about 2000 all the time. When I get hit it speeds up but not to much, seems on point. Except when I play hd videos the system get gets to 75-80c . I still have not had the freeze but that's because I have temperature monitor to launch SMC fan set at max fan speed when it get a to 80 d
    Degrees C.  I'm wondering if anyone knows the safe temp the 2011 MacBook Pro should be running at When playing hd video. I know it gets hotter when playing hd video by without SMC it seems my fans don't kick on to max speed untill the MacBook reached about 85-90c. Once the fans max it cools it right away. I know the fans are working cause I hear them but should the fans kick on faster before it gets to that hot if a temp. And is it safe to play hd movies of its running at about 80-85c?
    Thank you for any information you might have on safe and average temp and fan speeds. If anyone has a macbook pro please let me know when your playing hd video for about a half hour or more how hot your cpu is showing.

    Macs have established a reputation for being inferior game machines.  PC's dominate that area and if that is a high priority, I always recommend a PC.
    Pauletronic wrote:
    I'm happy to know that 85-90 is normal for video but my maCOBOL did almost fry my logic board from over Heating.
    I doubt that you almost' fried' the logic board, but you may have approached thermal shutdown.
    I also have a 2011 MBP and have run applications that are CPU/GPU intensive with no issues (the MBP certainly does heat up and gets very warm).  I have never felt the need for a third party fan control. 
    If you wish to run games a lot, a cooling pad and a cool environment would help the situation.
    Ciao.

  • Its just stops, freezes, and the fans come on.....

    This the third time in 2 days. I have been using my Imac for a year with no problems. So I'm not freaking out but like an a** I didnt get apple care. Oh I have a business so I can buy it. Whatever. In cases any fellow mac-ers didn't know if you have a business you can buy apple care after the original warrenty runs out.
    Anyways
    My (baby) Imac will just freeze and about 30 seconds go by, and the fans come on like a helicopter. I let it sit for a cople of mins and saw no change. I just turned it off. Has anyone experianced this?

    Shifty, could you please post where you got the information that you can buy AppleCare after your warranty runs out? As fas as I know, it can only be purchased before or on, the last day of your original warranty.
    As to your fan problem, look and see if your serial number is among those in Apple's Repair Extension Program, if so, your repairs, which probaly will include a new Power Supply Unit and logic board, will be made under the extended warranty.
    Please post back with the information,
    thanks,
    Miriam

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