|Nov 20, 2008, 06:43 AM||#1|
Crashing iMac 24" - how to diagnose
I have an iMac 24" 3.06Ghz, about six months old.
I have started experiencing random but frequent complete system freezes.
This is what typically happens over a period of 5 minutes:
1. I get the odd app crash (often Thunderbird, but possibly only because that is always running; sometimes mail.app crashes, something Open Office etc. No pattern to it).
2. The fans start thrashing although iStat doesn't record a higher temperature than normal. That said, the top bar hangs early on in this process so I guess the temp could be spiking. The box does not feel overly hot though (for an iMac). Normal temp about 39 degrees C.
3. All app windows freeze, and I get the beach ball. Mouse still works
4. dock freezes. Mouse still works.
5. keyboard freezes. Only mouse working now.
6. have to power off
I also have a very annoying ghosting problem on the screen that has only just started happening.
I am a relatively recent switcher to Mac, and have a lot of experience administering / developing on Windows XP.
I'm happy to trawl through the logs, so could anyone give me any suggestions about what to look for, what could be wrong etc.
|Nov 20, 2008, 08:29 AM||#4|
Anything particular to look for, or any particular log to focus on?
I'm happy to use console.app, but there is a lot of text in there. As a relative newb on the Mac I'm not sure what is a normal message, and what would be indicative of an error.
If, for example, my problems are indicative of a HDD problem what should I look for, and in what log?
If bad memory is the culprit, where would I look specifically, and for what?
|Nov 20, 2008, 08:52 AM||#5|
For some quick tips have a look at:
Disconnect all peripheral except your keyboard and mouse obviously. Your Mac should have come with a Hardware Test Disk. Run that and see what it says.
15” 2012 MacBook Pro | Mac Pro 6-core | 30” ACD
64gb 3g iPad and an iPod or two
|Nov 20, 2008, 08:14 PM||#6|
Thanks for your messages.
I'm exploring the possibility that it is iTunes 8.0.1 as there is a lot of web traffic about iTunes causing problems very similar to mine when downloading podcasts.
I've been trying to pull down some large Mac Developer podcasts recently...
|Nov 20, 2008, 08:27 PM||#7|
I think the reason yuo see it while downloading is only because downloads are a long running process. If a bit "flips" for in the kernel the machine would likley crash.
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