5793 Views 5 Replies Latest reply: Mar 15, 2010 12:50 AM by philmar
Welcome to the forum, Sounds like a hardware defect of some sort to me. How much memory do you have in the system ? Could be a memory defect, that´s causing the problem, although it should also arise during normal usage. Have you checked the log files to see anything strange there ? Also. do you have any USB devices hooked up to the IMAC ? if yes please disconnect ALL of them, and retry, see if that has an impact.
Saturday it first come up that the iMac crashes after sleep-mode (grey curtain - pls restart your computer). First restart often doesn't work. iMac hangs-up while booting with a white-screen. Second restart works.
What have i done so far:
Hi- please clarify. You say "grey curtain-please restart your computer". What does that mean? Do you mean that you see a grey screen with white text in several languages advising you to shut down and restart your mac?
If so, this is called a kernel panic- it usually indicates that there is some hardware problem with an attached device to your mac (either internal or external)
Power down, disconnect all USB/FireWire devices except for your standard apple keyboard and mouse, and power up and see if the problem continues.
Message was edited by: kguy
Thanks for feedback and welcoming! I'm really clueless at this point.
i have 4gb ram installed, nothing changed to factory. one usb device was attached but i detached it, i also thought it might be the problem, but problem still occurs. curiously this really only happens the way i described it ... no problems in normal use.
Is there a way to ad a picture to my answers here? Or is it allowed to post a link to a picture?
it is as you say it. no usb or firewire devices are connected.
Maybe any ideas due to the report i attached?
Ok ... after three weeks and three imacs ... i helped myself by taking a 101 in kernel_panic speech. Because i couldn't believe in three mac being bad ones. Here is what makes me think:
Kernel Extensions in backtrace (with dependencies):
And it always was this one! So is it plausible that three of three macs have crushed airports? could happen but under probability conditions really unlikely. So to day i changed the router. And what happend. No panics up to now. I hold my fingers crossed, but i think i got it.
Now i can start to believe again ... hopefully!
But one thing ... i mean apple come on, such issues shouldn't appear. And technically i don't get it, how an external devices goes down in the systems heart and makes it crash. if no wlan-connect would be available, ok, but that why ... i don't get it ... and i think i never will.
Yesterday my macbook started kernel panics on sleep. 10.6.2 had been on for a while so I don't think that upgrade was the problem. I had just upgraded the latest safari patch but I suspect the real culprit was a very big Secure Empty Trash that I did.
I found these 20 tips http://www.macosxhints.com/article.php?story=2004011205473937 and started working through.
My problem was immediately solved when I downloaded Cocktail from http://www.apple.com/downloads/macosx/systemdisk_utilities/cocktailmaintain.html
and cleared the caches.
I hope this helps somebody.