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Q: Power Mac G5 sleeps, then freezes and fans go overdrive.
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Jun 2, 2008 8:04 PMby ComputerAggrivation,Me either (usb card) I did add ram recently and have since removed it and no difference. I tried removing all but one set and then switching one set at a time, no different. The problem is getting worse and worse and now I can not get it restarted at all. Don't know why the light is blinking 3 times (indicating incompatible ram installed) when it is the same ram that has been in it for 3 or four years.
I really need help. I'm looking into a power supply issue but trying to find out how to test it to see if that is it. Anyone know? -
Jun 10, 2008 11:46 AMby YoKenny,OK, apparently my computer is also having this issue (my co-worker would shut it off before I came in, didn't know).
* So how many people who have tried altering the sleep method through the Terminal commands as listed above have not had a problem with it again?
* How many people who DON'T let their computer go to sleep still have this problem (it appears possibly one poster above disabled sleep and still had the issue).
It appears that it has to do with sleep and the method/order of going to sleep. Just trying to see how many folks have actually tried the fixes offered.
Message was edited by: YoKenny -
Jun 13, 2008 11:12 AMby ComputerAggrivation,I prevented it from going into sleep mode and that solved that part of the problem but then it started freezing while using Safari and it would take a whole ordeal to get it running again. I removed and checked my power supply as per apples service manual and it is fine. I may have to replace my logic board to get it to run again. It is currently DOA. This is happening to way too many people for this to be just a hardware problem... -
Jun 17, 2008 7:58 PMby bandit,I had the problem prior to installing leopard. It continued after Leopard. Apple replaced the Logic Board. The problem has returned. This is about the 4th time this month. I have not added any usb card.
I will be calling applecare as the warranty runs out the end of this year. -
Jun 18, 2008 1:06 AMby Yetizone,I've had the exact same problem as described by many of you:
http://discussions.apple.com/thread.jspa?threadID=1563635&tstart=45
I put the computer to sleep and then about 30 seconds or so later the fans come on at high 'take off' speed. The only cure being to hold down the power button.
I have tried...
1. Onyx maintenance.
2. Disc Utility (Verify & Repair Disc permissions).
3. Erase and install of Leopard 10.5.3 and all apps from the ground up.
4. Hard ware check with the original install disc - all fine.
The problem persists, BUT only when there is a load placed on the computer. If there are only one or two apps open its ok, but if I have some large Adobe PS files open with other apps it does not like it. I also noticed that in the Activity Monitor in Utilities something called kernel_task takes up a lot of Real Memory.
Has anyone come up with a definitive fix that works?
YZ.
G5 2.5 Quad with 2X internal HD. 4.5 G RAM -
Jun 18, 2008 2:19 AMby PowerPhill,Hey same problem, I got a G5 Quad, and it goes to sleep some times, but others it just goes on "Jet Mode" other times. I talked to the tech guy on the phone. I explained the symptoms and everything to recreate it. He suggested that it could be due to my external hard drive. He advised me to take it off and see if it does it again.
Because my computer seems to do it randomly, I quickly developed the superstition that maybe it was my external hard drive. After discovering my computer getting ready for "take off" without the external hard drive in place, it was clear to me that the Apple tech had no clue as to what he was talking about. I will call them again some time later on today. Hopefully they can provide a little more help next time.
I'll keep you guys posted.
I've been an Apple customer for some time now; knowing how apple works, the end to this issue is just an update away. Keep an eye out guys. -
Jun 18, 2008 8:34 AMby bandit,PowerPhill,
I agree Apple has no clue as to what is causing this. I sure wish they would figure it out as my applecare runs out this year. I will be calling apple about this. Don't want my G5 dying on me after my applecare runs out. That would really make me mad!
It always seems to happen after using the screensaver. Yesterday i thought i had put it to sleep, but upon returning home, i found the fan's roaring like a jet engine. GRRRRRRR -
Jun 26, 2008 11:38 AMby squarebones,I have observed that when my computer goes to sleep (automatically/scheduled) while at the login screen (even if users are logged in or not), the computer will do the "jet launch freeze-out" and I have had no recourse but to hard-shutdown the machine. Since setting sleep to Never for both computer and display, I haven't had the problem. My screensaver works fine and the computer wakes up from that as usual. My display is set to put itself to sleep after an extended period and computer is schedule to shut down every night at the same time. Again, no problems. Obviously it is the "sleep" function that is the problem. And as the "sleep" function was designed to prevent battery drain on laptops, do desktops really need to go to sleep? How much energy are you really saving by using this function. I feel that if I am done using the machine, it is better shut down, than left on in some somnambulistic twilight zone. Just give your computer a rest and you'll sleep a lot better, too, I'm sure. -
Jun 26, 2008 12:18 PMby Joe Scheiman,I have experienced this too.
Here is a reply I posted in a similar thread..
http://discussions.apple.com/message.jspa?messageID=7450940&tstart=0
As well as one I started back in late April this year...
http://discussions.apple.com/message.jspa?messageID=7096194#7096194 -
Jun 29, 2008 3:28 AMby deboni,Same problem here. Since I updated to 10.5.3 I've experienced several freezes and fans going crazy a day.
I had tried disk repair, permission repair, cleaning font caches, hardware check using TechTool Pro etc. with no result and finally Archive and Install of the OS.
I then called Apple support and was told that this must be a problem with the OS and that I should do a clean install of Leopard.
I did so! And all the updates and programs like Adobe, Macromedia etc. (took me a whole day)
Today the same problem appeared again. When I came back from a brake, the fans went full blast and the system was frozen.
I will call Apple again tomorrow and will post here the reply.
Meanwhile I hope that Apple will find a solution for this problem. I strongly believe that it has to do with the 10.5.3 update since prior to that, I hardly had any crashes. -
Jun 29, 2008 12:14 PMby bandit,As my applecare will be running out soon, i took my desktop to the apple store yesterday. we will see if they can find a problem or not. Since it happens randomly, i dont know if they will be able to replicate it. i will sure be mad it the computer dies on me after my applecare expires. -
Jun 30, 2008 4:44 AMby hibernian,A similar problem I am having. Nearly 3 weeks ago I found that my machine was locking up (got the little beach ball) no response from the keyboard , the fans started and the g5 was ready for take-off. I had to force the power off on the front of the machine. It happened a few times. It has been in for warranty repair twice since then(first time replacing the processor , second time I got a new logic board). I just got it back on friday and its still having the same problems. (Though the beach ball no longer appears) Screen locking up, and fans kick in after a few minutes. I have to force the machine off manually but at least it is powering back up again, but its a pain i.t.a. as its so unpredictable at locking up. My machine is 3 years old and the extended warranty runs out this week. -
Jul 1, 2008 5:20 PMby royalphotography@mac.com,My G5 is currently at Apple for the same thing. It started not long after I purchased it. I have been given the run around by Apple care and store tech's for the longest time. I was at my wits end. It got worse after I installed Leopard. I finally decieded that it was time since I have less than 6 months left on Applecare for this machine. So far it has been in the shop for almost a week. They are testing the RAM, the current theory is that I have bad RAM, I don't believe that is the case though. It will be interesting to see what they come up with next.
