PowerMac G4 unable to sleep

[Qrani]

My PowerMac G4 (450MHz AGP) is unable to properly go to sleep. When it does sleep it either never wakes up, and I have to reset the system and wait 10 minutes for my hard drive to be repaired, or it does wake up, but complains that there's a device stopping it from sleeping. The device is the SCSI card (At least that's what System Profiler says), that came with the computer. I could somewhat understand if it was an actual addon, but it was put there by Apple themselves. The easy solution is just to take the card out. But is there any other workaround for this? I do actually use the card sometimes.

 

[Romko23]

Try to do a PMU reset to reset the computer's internal system. Here is a pic of where the PMU switch is. Amazing, all this stuff used to be on Apple's website, it seems they did a recent clean up of the server and older tech articles are gone. https://www.sweetwater.com/sweetcare/articles/resetting-pmu-g4/

 

[Qrani]

Try to do a PMU reset to reset the computer's internal system. Here is a pic of where the PMU switch is. Amazing, all this stuff used to be on Apple's website, it seems they did a recent clean up of the server and older tech articles are gone. https://www.sweetwater.com/sweetcare/articles/resetting-pmu-g4/

Tried, still gives the issue of not being able to sleep

 

[Romko23]

Hmm.. could it be maybe just maybe the SCSI card in there was not installed by Apple themselves ? What OS are you running on the G4 ? A G4 450 sawtooth came with OS 9. When you try to take out the SCSI card, is goes to sleep ? Do you have anything else hooked up to the G4 which could prevent it from sleeping ?

 

[Byrd]

It was usually rogue PCI or USB devices that prevented sleep, a marginal PSU could also be a culprit. Try the card in another slot, maybe a fresh OS install.

 

[CC_333]

Sometimes in my experience, such as when using restore disks from another model, the system software won't have the proper extensions to support sleep, and that will also cause this problem. A fresh OS install, as Byrd suggests (using an installer meant for your specific model, of course) ought to fix this if it is indeed the cause.

If not, perhaps the SCSI card doesn't have its proper drivers installed, but if it is an Apple-installed option, the SSW installer for your model should fix that too if it's a problem.

c

 

[Phipli]

Does it have its stock Power Supply?