|Jun 29, 2006, 02:30 PM||#1|
iMac G5 - Loud Fans After Single-User Mode
I have one of the iMac G5 1.8 (Rev A) machines and it's always been fine, right until installing update 10.4.6.
Since that update, whenever I enter single-user mode (Apple-S at startup) the fan spins right up as it normally would, but when I reboot the fans stay at full belt. Before 10.4.6 they used to spin down again as the machine rebooted. Properly shutting down and disconnecting the power has no effect, the fans are still full steam ahead the second I power up.
Currently the only way I can fix it is to take the rear panel off and hit the SMU reset button. Things are then fine until I go back to single-user mode. Admittedly it's not that often, but it's still an annoyance that shouldn't be happening.
I was hoping 10.4.7 may have fixed something, but alas no.
Anyway, does anyone know why this happens, and why it's a recent development since 10.4.6? I always thought the SMU was controlled by the firmware, and not the OS. If it is controlled by the OS, have Apple changed anything?
I'm just looking for ideas.
|Nov 10, 2006, 12:35 AM||#2|
With my G5, the fan would spin to full speed every now and then after I enter single-user mode. The solution for me is to shut down *and* unplug it for a few minutes. Try it, it's easier than re-installing the system!
|Thread Tools||Search this Thread|
|thread||Thread Starter||Forum||Replies||Last Post|
|imac g5 video gone bad....capacitor! FIXED||morrisroad||iMac||9||Nov 21, 2013 12:58 AM|
|iMac G5, Memory, and Leopard||NeverhadaPC||iMac||3||Aug 13, 2011 10:58 PM|
|Imac G5 very loud noisy Fan constantly stuck "on"||boris.jones||PowerPC Macs||12||Apr 26, 2011 09:00 AM|
|iMac G5 - Black screen and loud fan noise upon boot||StuartCH||PowerPC Macs||3||Feb 7, 2011 07:00 PM|
|iMac G5 - Black screen and loud fan-noise upon boot||StuartCH||iMac||0||Feb 6, 2011 10:06 AM|
All times are GMT -5. The time now is 12:23 AM.