david1986
asked on
IMac G5 Random Shutdown
I am working on an IMac G5 that has been randomly shutting down. Somtimes it will run for a few hours, other times it will run for a few seconds and then just shut down like it has lost power.
I had replaced the PSU in the system a few months back and it was working good then, but now its back and im just not sure what is up with it.
Any ideas will help and thanks ahead of time
Chris
I had replaced the PSU in the system a few months back and it was working good then, but now its back and im just not sure what is up with it.
Any ideas will help and thanks ahead of time
Chris
Check in /var/log/system.log (you can access this in Console as well).
You might find that the system is overheating and so automatically shutting down. This happened to my son's iMac G5 (without a camera). They extended warranty repairs on this model for some time due to issues with capacitors.
Cheers,
Joel
You might find that the system is overheating and so automatically shutting down. This happened to my son's iMac G5 (without a camera). They extended warranty repairs on this model for some time due to issues with capacitors.
Cheers,
Joel
ASKER
I tried resetting the SMU and still the same problem. Unfortunately i have been unable to get the system to fully boot so i can not check the log file to see what info is in there.
If it were an overheating issue, would the system shut down that fast. It is now shutting down about 5 seconds after the power button is hit.
Any more ideas would be great.
Chris
If it were an overheating issue, would the system shut down that fast. It is now shutting down about 5 seconds after the power button is hit.
Any more ideas would be great.
Chris
I would try plugging it into another outlet or new surge strip in another outlet to make sure that it's not a power line issue.
Also possible that if there is a fan on the CPU, not sure if there is or not, it could be failing and it can take almost no time at all before a CPU will over heat.
Other than that, I would suggest another P/S.
Also possible that if there is a fan on the CPU, not sure if there is or not, it could be failing and it can take almost no time at all before a CPU will over heat.
Other than that, I would suggest another P/S.
Not sure if this is your exact model, but here's some info on getting into the case and once there you could probably see the fan.
>If it were an overheating issue, would the system shut down that fast. It is now shutting down about 5 seconds after the power button is hit.
If it's pre-warmed by prior power-on cycles, then yes. Common problem with cracked thermal paste between heat sinks and CPU and graphic chips. I've seen it in notebooks...let it sit overnight and it will boot & run for a minute or two, then shut down. After that, it won't get far enough to even start booting.
If it's pre-warmed by prior power-on cycles, then yes. Common problem with cracked thermal paste between heat sinks and CPU and graphic chips. I've seen it in notebooks...let it sit overnight and it will boot & run for a minute or two, then shut down. After that, it won't get far enough to even start booting.
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ASKER
We still haven't gotten this straightened out. Just need to try another power supply I guess.
http://support.apple.com/kb/HT1767?viewlocale=en_US
In the above link is also a link to how to reset the PRAM.