01-04-2011, 04:27 AM
Seeing that the following is what safe mode disables, I am inclined to think that this is software/files/etc. and not hardware related.
Mac OS X: What is Safe Boot, Safe Mode?
I would run OnyX Download OnyX for Mac - OS X maintenance & optimization tool. MacUpdate.com
-after it has checked the smart status and verified the volume, select the automation tab, checking everything in there, and let it run it's magic and see how it goes after it reboots once it has run all the processes again.
Failing that, I would create a new account, log out of your account and into the new account.
Next up, I would run the extended hardware test, booting from install disc 2 holding D key, and if that comes up clean.....
The good old clean install, by booting off your install disk 1 holding C.
-Go to utilities, disk utility in the menu bar after selecting the language.
-Select your HD.
-Name Macintosh HD.
-Format mac os extended (journaled).
-Quit utilities and continue with installation.
Post back with the results.