First, make a note of any clues to the cause of the problem, such as

•	recently installed software (especially items added to the System Folder)
•	programs you had open when the problem occurred, and exactly what you did
•	the version of system software and applications you're using
•	information on the screen, such as an error message

This information can help you determine the problem you're having, and is useful to the service and support technician if you have to call for help.

Tip: Use the Apple System Profiler to create a report about your computer. Print and save the report so that you can refer to it if needed.

Try these solutions

	Making sure external equipment is connected and turned on
	Resolving SCSI ID conflicts
	Resolving system extension conflicts
	Resetting PRAM
	Testing and repairing a hard disk
	Reinstalling system software

If none of these solutions works:
You may have a hardware problem. For information on how to contact Apple service and support, see the service and support card that came with your computer.

For more information

You can find more information about crashes and freezes in AppleCare Knowledge Base at kbase.info.apple.com