Mac Mini Kernal Panics and AHT error - long description
I have a late 2009 Mini that has had kernal panic issues for some time. When I first bought the computer it had 1/120 and I upgraded it to 2/320 myself. It is hooked up to my HDTV as a media server and it started getting kernel panics running Netflix in Safari. Sometimes the fan would spin up to very high levels while running Virtual Box with Windows XP.
It seemed to be the added RAM and I pulled it. Panics went away but now it is very slow. I purchased 2 - 2GB RAM from OWC and installed in machine. It was good for a while but then started kernel panics again.
Recently my MS bluetooth keyboard started having issues connecting and the panics got worse. I ran AHT on the machine and got the following error code:
4MOT/2/40000004: Master - 0 I reran the test and got 4MOT/2/40000004: Master - some 4 digit number I didn't write down because someone unplugged the machine while I was getting a pen.
It appears to be heat related because after a kernel panic if I leave the machine turned off for half an hour or so it works again for a while but if I just restart it will panic again within the next 15 minutes.
Zed Ruhlen wrote:
Thank you for the answer. I suspected a fan issue considering the symptoms. I know others have had fan issues with other MOT codes but wasn't sure.
It is odd that it says MOT instead of, oh, say, FAN.
I think my first step will be to run the fan utility and see what the fan and temps are doing before I go to a Genius bar.
Go ahead and make the appointment; if the AHT says it's bad, it needs attention.
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I suspect that your HDD is in serious need of maintenance. Here's what I would do:
1. Go to Applications > Utilities > Disk Utility. In the left panel select your HDD (manufacturer ID), and in the main panel select the First Aid tab. Click Repair Disk Permissions.
2. Boot from your install disk. Go to the Installer menu and launch Disk Utility. Select your HDD (manufacturer ID) in left panel and First Aid in main panel. Click Repair Disk. If DU reports disk needs no repair quit DU and restart.
If DU reports errors, click Repair again, and again until DU reports the disk is repaired. If DU reports errors it cannot repair you will need to use a utility like Tech Tool Pro or Disk Warrior.
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cornelius -
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--end--
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This is your Mini:
Introduced
July 2011
Discontinued
October 2012
Model Identifier
Macmini5,1 (2.3 GHz) Macmini5,2 (2.5 or 2.7 GHz)
Model Number
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EMC
2442
Order Number
MC815LL/A (2.3 GHz), MC816LL/A (2.5 GHz)
These are the requirements:
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Learn about the system requirements for OS X Mavericks.
To install Mavericks, you need one of these Macs:
iMac (Mid-2007 or later)
MacBook (13-inch Aluminum, Late 2008), (13-inch, Early 2009 or later)
MacBook Pro (13-inch, Mid-2009 or later),
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MacBook Air (Late 2008 or later)
Mac mini (Early 2009 or later)
Mac Pro (Early 2008 or later)
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i have installed mountain lion. No problem with the instalarrion.
Now when i want to turn off my Mac mini, it restart and not turn off.
What happen?
Alain Hermosilla Ringger
ChileI reply to my self
I have a mac mini late 2009 with Mountain Lion
I solved this problem disabling the second monitor from the dvi conection and conected it again with the vga plug in. My main monitor also conected by a hdmi plug to my mac mini
My mac mini turn off with no problem now and the rebbot loop disapear
Alain Hermosilla
Chile
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