Solved

IMac G5 Random Shutdown

Posted on 2010-09-02
9
1,079 Views
Last Modified: 2012-05-10
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
0
Comment
Question by:david1986
9 Comments
 
LVL 28

Expert Comment

by:jhyiesla
ID: 33588439
You might try resetting the SMU:

http://support.apple.com/kb/HT1767?viewlocale=en_US

In the above link is also a link to how to reset the PRAM.
0
 
LVL 12

Expert Comment

by:dalesit
ID: 33588508
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
0
 

Author Comment

by:david1986
ID: 33589648
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
0
How our DevOps Teams Maximize Uptime

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us. Read the use case whitepaper.

 
LVL 28

Expert Comment

by:jhyiesla
ID: 33589893
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.
0
 
LVL 28

Expert Comment

by:jhyiesla
ID: 33589915
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.
0
 
LVL 32

Expert Comment

by:aleghart
ID: 33592192
>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.
0
 
LVL 28

Expert Comment

by:jhyiesla
ID: 33595725
0
 
LVL 1

Accepted Solution

by:
kpliew1 earned 500 total points
ID: 33659044
Still is power supply problem, check your iMac still under "Repair Warranty" or not? Basically, it come with 3 months repair warranty.
0
 

Author Closing Comment

by:david1986
ID: 33802393
We still haven't gotten this straightened out. Just need to try another power supply I guess.
0

Featured Post

How Do You Stack Up Against Your Peers?

With today’s modern enterprise so dependent on digital infrastructures, the impact of major incidents has increased dramatically. Grab the report now to gain insight into how your organization ranks against your peers and learn best-in-class strategies to resolve incidents.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Troubleshooting Apple Desktops has its challenges just like any component of high technology and innovation. Some hardware issues within Apple Desktops, are fairly simple to resolve and have straight-forward procedures. With other hardware probl…
What's a UDID? If you're involved in developing, testing, or even reviewing an iOS application that's in beta, then at some point you may need to know the UDID for any iOS devices that you'll be testing on. What's the UDID? It stands for Unique Dev…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…

821 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question