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You are here: MacNN Forums > Software - Troubleshooting and Discussion > Mac OS X > End All Troubleshooting List For Kernel Panics

End All Troubleshooting List For Kernel Panics
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Join Date: Feb 2011
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Feb 5, 2011, 12:59 PM
 
I have been tasked to put together an end all list to troubleshooting Kernel Panics. Please take a look at this list to verify if I missed any steps you would try.

I understand that there will be specific fixes to specific causes, and not all of these would be used in any one situation. Also not yet listed in specific or correct order that troubleshooting should be done.

Some list instructions on how to do the needed troubleshooting, some do not. This would be user specific, dependent on computer knowledge so I did not get into that yet.


* Was a change just made, added ram, HD, card of any kind, software installed? Remove/uninstall and reboot.


* Verify cables, connections and their proper installation and ensure that they are working properly.


* Restart your computer.


* Make sure that sufficient RAM and hard disk space is available for proper functioning of Mac.


* Remove all peripherals down to monitor, keyboard and mouse.


* Run Software Update.


* System Scan with Tech Tool Deluxe.


* Clean Cashes.


* An incompatible login item could cause this symptom.


* Selecting the "Connect automatically when starting TCP/IP applications" option in Network preferences can sometimes cause this issue.


* open-source tool 'Rember'.


* Reset certain privileges.


* Remove fonts folder (10.3.9 and earlier).


* Uninstall Any KEXTs To check the KEXTs that are running on your system currently, type this command in Terminal (Applications >> Terminal) and hit enter:sudo kextstat.


* If particular app, delete Plists.


* Verify & Repair Permissions.


* App specific: Delete and reinstall app.


* Apple Hardware Test.


* Run FSCK Start up holding command and 's' to boot in single user mode. Type the following exactly as this with the spaces fsck -fy and then press the return key reset-nvram then press return, set-defaults then press return, reset-all then press return.


* Start computer by pressing power button then holding down the Shift key.


* Hold down the X key and choose Apple menu > Restart. This may force the computer to start up using your Mac OS X system. If the computer starts up, release the X key. Choose Apple menu> System Preferences, and then click Startup Disk. Make sure that the disk containing Mac OS X is selected.


* Restart and immediately hold down the Option key. When icons start to appear in the center of the screen, release the Option key. Select the disk that contains Mac OS X, and then click the forward arrow to continue starting up.


* Boot from the Install DVD. Restart holding down the C, does it boot?


* Reset PRAM. Start computer by pressing power button and hold down Command Option P and R buttons at same time and hold until you have heard the start chimes 3 times, then release all buttons and let it boot up.


* Hardware Test. Use the DVD that came with computer and press the power button and immediately insert the DVD and once it goes in hold the D key down. When it boots up hit return and then select which Hardware test you want to run, probably a good idea to do the extended test even though it may take an hour to an hour and a half to run through.


* Reinstall Mac OS.


* Erase and Install Mac OS X.


* Contact Apple Inc.
     
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Join Date: Apr 2001
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Feb 5, 2011, 06:24 PM
 
In my experience, 95% of kernel panics are hardware and not software. The list I'm giving below is for "consumer level" troubleshooting.

Disconnect all peripherals, except keyboard and mouse.

Boot from an install disk. If it boots properly, it's a software issue.
While booted from the install disk, attempt to repair the disk in Disk Utility.
If the disk checks out, try a reinstall.
If you still get a KP after reinstall:

Contact Apple.
If you get a kernel panic booting from the install disk, it's most likely a hardware issue.
Zap PRAM
Reset SMC
Reseat RAM
If RAM has been upgraded, try putting the original RAM back in the machine.
If you still get a KP:

Contact Apple.
The problem here is that the troubleshooting is also dependent on exactly when the KP happens. If it happens before you can log in, the amount of troubleshooting you can do goes down greatly. If it happens after login, there is a bunch of stuff you can try.

Creating an "End All" troubleshooting list is quite an endeavor, and would probably more useful in the form of a flowchart.
     
   
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