Previous 1 2 3 Next 38 Replies Latest reply: Jul 16, 2006 6:52 AM by nuttysami123
Danny123 Level 1 (0 points)
My G5 iMac has been having some problems lately. When the computer goes to sleep, I cannot get it to wake up properly. No movement of the mouse or button pressing will wake it up. If I tap the power button, the fan will run loudly, the light will immediatley shut off, and I cannot get it to do anything. Any suggestions would be great.

iMac G5, Mac OS X (10.3.9)
  • sherry johnson Level 4 (2,715 points)
    hi there--

    i would try a couple of things. go to /library/preferences and go into the folder called system configuration. remove the autowake.plist and the powermanagement.plist to the trash and restart the computer. set the computer to sleep after one minute in the energy saver preferences and test. if it still isn't working, then try resetting the pmu. you don't specify which model of g5 you have, so i can't tell you how it is done. you should be able to easily find info in the apple database or in your user guide. good luck with that. [ 8 ) ]
  • MGW Level 7 (27,020 points)
    Welcome to dicussions Danny ; your problem might have to do with a failing Power Supply Unit - if your serial number falls within the parameters of Apple's Repair Extension Program, your machine will be fixed for free. Hopefully, you have AppleCare as well, so I would suggest calling them. Also, be sure and make a full, bootable clone of your HD in case anything goes radically wrong. I use SuperDuper!, it's well worth the money.

    Please post back and let us know how you make out,
  • Thomas Vellenga Level 1 (35 points)
    I am having the exact same issue that happens about 95% of the time. This did not start happening until after the update to 10.4.7 so I am going to see what I can figure out as well. I have an iMac G5 20 inch screen with 2 GHZ and 1.5 Gigs of RAM.
  • Rod Hagen Level 7 (31,985 points)
    Danny and Thomas, what peripherals do you have attached to the computer? Some USB devices especially (though FW devices can cause such problems too) can run into problems after OS upgrades and the like.

    USB Hubs, USB adsl modems and some third party keyboard / mouse combinations are particulary common causes of the problem, but other devices can also be involved.

    Try removing ALL peripherals apart from the mouse and keyboard and see if the problem persists.

    If this isn't the problem, then the next thing to consider is the possibility of incompatible background software.


  • nuttysami123 Level 1 (0 points)
    I too am having the same exact problem and it only started after I did the OS X update last week. My imac is doing this every time it goes to sleep. I wiggle the mouse and it shuts off. Then I can't get it to power on. It takes about 2-3 pushes of the power switch to finally get it to power up. This is really annoying and I don't know what to do! Thanks for any help!!
  • Rod Hagen Level 7 (31,985 points)
    If the earlier suggestions don't help you nuttysami, then might want to try downloading the full "Combo" update of )SX 10.4.7 and installing this over the top of your exuisting installation. Using the "Combo" updater will often resolve problems that arise when you have used either the "Software Update" or "Delta" version of an OS updater -

    You can download it from is the correct version for a G5 iMac . (the intel based machines need a different version)


  • nuttysami123 Level 1 (0 points)
    Thanks for the tip! I am trying the download right now. I will post a response as to how it goes. Keep your fingers crossed!!
  • Thomas Vellenga Level 1 (35 points)
    The only devices that are attached to my system are a Logitech Wireless Laser Mouse. The USB Rcvr/Charger is attached and the Apple iPod Dock. I think I might have found a workaround for now though. If I just make the system go right to sleep it seems to wake up OK. The issues were only happening when I would Logg off first and then make the system sleep. I am going to see what others report too about installing the combo update and see if that works.

    Thanks for your help!
  • Rod Hagen Level 7 (31,985 points)
    Thomas, the Logitech mouse may also be the source of the issue. Logitech software installs its own system extensions ("kexts") and these have resulted in similar problems in the past at times. A quick google on "Logitech mouse OSX 10.4.7 " reveals quite a few people reporting issues with their Logitech mice after updating to 10.4.7.

    There was a revised version of Logitech Control Center for Macs released in April this year, so if you haven't already got this installed it may be worth doing so. It is available from their download site their download site

    I note, though, that Logitech still only have qualified it for use with OSX up to version 10.4.6.

    If you have a regular Apple mouse as well as your Logitech it would be interesting to know whether the problem still occurs if you uninstall the Logitech software and try using the regular Apple mouse for a while.

    If not it may be worth trying USB Overdrive instead of the Logitech drivers.

    The combo update approach is worth trying too, though.


  • Tabeer Badar1 Level 2 (150 points)
    I seem to be having the same problems as nuttysami123. When my imac G5 is asleep and I click on the mouse to wake it up, it wakes up, but is unresponsive to any attempts to open up a program, such as safari, or go to Finder, or mail. Nothing happens. I have to shut the computer off manually via the power button in the rear. Last time I had to do this, the computer would not fully make it to the desktop screen, nor even the screeen where it indicates that MAc OS X is starting up and the indicator for staring up slowly fills up. The computer's fan started running, it seemed, at full speed while the computer stayed fixed in the grayish screen with the macintosh logo. It did this twice until finally the third time it fully started up. My computer fits the profle of the first generation IMac G5s sold between the dates designated by the g5 IMac repair program and its serial number is also in the range of those covered by this program, (as posted by Miriam). The only difference between my setup and those of others' in this thread seems to be that I am stuck at 10.3.9. However, this problem seems to have begun recently, following the latest QT and security updates. Also, my comuter is approx 1.5 years old , and unfortunatelu i failed to acquire Apple Care. As its sale date and serial number fall within the Repair program paramaters, the computer should be covered by the Repair Program, if these particular wake issues fall within the power designation of the repair program. I plan on calling Apple tomorrow to see what they say. Meantime, can anyone offer any other avenues I could attempt to try to address this disturbing problem? I would really hate to be without my computer for any length of tme.
  • Monterey Gardiner Level 1 (15 points)
    Well I tried all the options with no luck. I noticed that some time during the last week, my computer would no longer wake from sleep. The timing is about right for the 10.4.7 update. Anyway, my first thought was maybe it was related to the recall. My serial number is in the affected range.

    I called Apple support and described the problem. Fans at full blast within a few minutes of choosing sleep. The guy said it probably was not related, but to take it into a store. Last night I tried booting from a back up system disk 10.4.5 just to be sure and had the same problem.

    Trouble shooting tonight I plugged in an old usb keyboard and mouse tp reset the pram. I had it completely loose power a few times on choosing sleep. I reset the SMU etc. Still no luck. I finally tried reinstalling the combo update. Took awhile to restart. Tried to sleep. Still no wake or boot. Worst of all on holding the power button all I get now is a chirp. After waiting a few minutes the computer started, but the fans reved to high for .5 seconds twice then booted. I tried sleeping again, and I got a restart. The computer is seriously screwed up. I hope they can fix it. Luckily I have apple care.

  • Rod Hagen Level 7 (31,985 points)
    Yours sounds as if it may well be a hardware issue, Monterey , especially as it occurs with multiple boot discs and (presumably) an Apple mouse and keyboard as the only peripherals attached.


  • karysheila Level 1 (5 points)
    hello everyone,

    I'm new to this forum, but i think i see one thing that most responses are missing. We have two imac g5s having the same problems as described by everyone else. THESE STARTUP PROBLEMS BEGAN WITH THE 10.4.7 UPDATE! So, how do we get apple to solve the problem which the updated has created?
  • Rod Hagen Level 7 (31,985 points)
    Sorry, karyshea, but even though 10.4.7 may have resulted in these problems manifesting themself for a few people it doesn't mean that its necessarily up to Apple to resolve the issue.

    Firstly there is the question of user issues. Did people repair permissions and check the integrity of their directories before updating? Did they do other things while the update was being installed, which may have affected the process?

    Secondly, such problems can often occur because a software or hardware developer hasn't actually followed the necessary "standards" . In such cases its not uncommon for problems to emerge when a new update arrives, even though the problem wasn't apparent beforehand.

    Thirdly, OS updates sometimes don't install properly because other poorly written software (such as USB device drivers) has changed the nature of the system BEFORE the update was installed.

    Finally some files that are NOT overwritten by the update may have been corrupted. (Hence the fact that simply re-installing the Combo update sometimes fixes things).

    The best way for these things to be resolved is for the device or software producer to work closely with Apple when updates are in beta phase. Some do, some don't. Sometimes this results in the update "breaking" things unnecesarily. Sometimes its a fault with the update software. Sometimes its the fault of the third party provider.

    If I were you I wouldn't wait for a "fix" from Apple. There may be nothing for them to fix. Try and resolve the issue for yourself now.

    For what its worth I have absolutely no sleep problems after having upgraded four Macs (an iMacG5, a PB 12, an iBook G4 and a MacBook) to 10.4.7 myself. Its clearly not simply a problem with the update, but rather something that involves an interaction between it and some other product or products.


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