Author: jagman, Location: NorwayPosted: Mon Jun 02, 2008 12:14 pm Post subject: My iMac G5 suddenly goes into standby mode ---- Hi,
My G5 is behaving rather strange lately; after a half to one minute of operation it goes black and goes into standby mode. When I wiggle the mouse, it comes back up but another half minute, it goes back to sleep.
Rather annoying! I have turned it off and restarted it, but it's the same.
I am certain that no settings have been altered.
Please help!
Author: Sherman Homan, Location: Norwell, MAPosted: Mon Jun 02, 2008 12:53 pm Post subject: ---- It is going to sleep while you are actively using it?!
Sleep settings are in the System Preferences, Energy. When that doesn't seem to work right, you may have a fading logic board battery. The timing would be about right for a G5 at this point. They are easy enough to find, easy to replace.
Try this first, from a cold dead shut down, power up, at the sound of the startup chime immediately hold down the following keys:
Apple Option P R
That will "zap the pram" which will reset the data that the logic board battery remembers. If that fixes the problem temporarily then replace the battery.
Author: jagman, Location: NorwayPosted: Mon Jun 02, 2008 1:27 pm Post subject: My iMac G5 suddenly goes into standby mode ---- Thanks Sherman!
Yes, it goes to sleep while I'm actively using it! I will try the prescribed test when I get home.
Cheers,
Author: Sherman Homan, Location: Norwell, MAPosted: Mon Jun 02, 2008 5:23 pm Post subject: ---- Bard, check out this from Apple, you may need to reset the System Management Unit:
http://docs.info.apple.com/article.html?artnum=300341
But definitely zap the pram first.
Author: jagman, Location: NorwayPosted: Tue Jun 03, 2008 11:54 am Post subject: Mac goes to sleep ---- Hi Sherman,
Problem seemed to be fixed. At least temporarily, so I'm replacing the battery.
Your other tip also contained several issues that I'm having, so will also reset SMU/PMU. Hopefully it will again be possible to operate the thing without ear mufflers!
Cheers,
Bard
Author: Sherman Homan, Location: Norwell, MAPosted: Tue Jun 03, 2008 12:10 pm Post subject: ---- Those things can sound like a vacuum cleaner when the fans rev up to full blast! The G5s actually had a firmware update that dealt with fan spin up, simply run the software update to make sure you have the right one.
Author: jagman, Location: NorwayPosted: Tue Jun 03, 2008 2:55 pm Post subject: Sleeping beauty ---- Which one man? I've followed up and installed all the suggested updates, and in general the unit seems healthy, although a soarly needed RAM upgrade is imminent!
Author: Sherman Homan, Location: Norwell, MAPosted: Tue Jun 03, 2008 3:22 pm Post subject: ---- If Software Update doesn't indicate anything then you are fine. Hope this all works out for you!