Go Back   MacRumors Forums > Apple Hardware > PowerPC Macs

Reply
 
Thread Tools Search this Thread Display Modes
Old Aug 7, 2011, 04:04 AM   #1
Jethryn Freyman
macrumors 68020
 
Jethryn Freyman's Avatar
 
Join Date: Aug 2007
Location: Australia
Thumbs down Power Mac G5 sleep and video issue

Hey guys.

Dual 1.8GHz Power Mac G5 (June 2004) here running Leopard. Known good display and DVI cable and Radeon 9600 XT.

Problem: occasionally when I put the computer to sleep, it won't go to sleep. The computer stops outputting video and the screen turns off (as it's supposed to), but the computer is still on, and doesn't go to sleep. Can't be woken back up, so to speak either, it's like its' stuck in limbo. This is intermittent and is fixed by a reboot. Haven't seen anything in the logs to indicate a problem.

Question: how do I reset the SMU/PMU on this model Mac? I've found directions for the slightly older and slightly newer models (one is unplug the power cable for a few minutes, the other is press the reset button on the logic board (can't seem to see one on my Mac.))

Second problem: sometimes video output will stop, the screen will turn blank for a second or so and will do this a couple of times in quick succession, then it's fine again for many days. Intermittent. Check connections between the Mac and the monitor and they're all fine.
Jethryn Freyman is offline   0 Reply With Quote
Old Aug 7, 2011, 04:47 PM   #2
ecschwarz
macrumors 6502a
 
Join Date: Jun 2010
Location: Indiana
Quote:
Originally Posted by Jethryn Freyman View Post
Hey guys.

Dual 1.8GHz Power Mac G5 (June 2004) here running Leopard. Known good display and DVI cable and Radeon 9600 XT.

Problem: occasionally when I put the computer to sleep, it won't go to sleep. The computer stops outputting video and the screen turns off (as it's supposed to), but the computer is still on, and doesn't go to sleep. Can't be woken back up, so to speak either, it's like its' stuck in limbo. This is intermittent and is fixed by a reboot. Haven't seen anything in the logs to indicate a problem.

Question: how do I reset the SMU/PMU on this model Mac? I've found directions for the slightly older and slightly newer models (one is unplug the power cable for a few minutes, the other is press the reset button on the logic board (can't seem to see one on my Mac.))

Second problem: sometimes video output will stop, the screen will turn blank for a second or so and will do this a couple of times in quick succession, then it's fine again for many days. Intermittent. Check connections between the Mac and the monitor and they're all fine.
Sounds like you could have a dead battery - our Power Mac G4 MDD was doing the same thing and that fixed it. As for the directions:

http://support.apple.com/kb/ht1939

It does have a CUDA switch (aka reset button), but different G5s have them in different places...check near the RAM slots.
__________________
Mid-2012 13" MacBook Pro (2.9GHz i7 / 8GB RAM / 250GB 840 Evo), iPhone 5, iPad (3rd-gen), Apple TV (2nd-gen)
Visit SchwarzTech - Celebrating 15 Years
ecschwarz is offline   0 Reply With Quote

Reply
MacRumors Forums > Apple Hardware > PowerPC Macs

Tags
power mac g5, sleep, video

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Similar Threads
thread Thread Starter Forum Replies Last Post
REALLY Weird rMBP Graphics Issue out of Sleep (Video inside) stephen1108 MacBook Pro 7 Dec 13, 2013 07:50 AM
Mac mini sleep power light behaviour change Ropie OS X Mavericks (10.9) 8 Nov 7, 2013 07:26 AM
Power Issue - Mac Pro 2008 EWelton Mac Pro 3 Aug 18, 2013 02:37 AM
Mac Mini Sleep Issue? phr0ze Mac mini 9 Feb 21, 2013 04:59 PM
Mac Pro weird sleep issue El Awesome Mac Pro 4 Dec 1, 2012 10:45 AM

Forum Jump

All times are GMT -5. The time now is 03:53 PM.

Mac Rumors | Mac | iPhone | iPhone Game Reviews | iPhone Apps