Apple iMac (21.5-inch and 27-inch, Mid 2011) - Manual (Page 46)

46 Chapter 4 Problem, Meet Solution
Occasionally you may have problems while working with your iMac. Read on for
troubleshooting tips to try when you have a problem. You can also find more
troubleshooting information in Help Center and on the iMac Support website at
www.apple.com/support/imac.
If you experience a problem working with your iMac, there’s usually a simple and quick
solution. If you encounter a problem, try to make a note of what you did before the
problem occurred. This can help you narrow down the possible causes of the problem
and then find the answers you need. Things to note:
 The applications you were using when the problem occurred. Problems that occur
only with a specific application may indicate that the application isn’t compatible
with the version of Mac OS X installed on your iMac.
 Any software that you recently installed.
 Any new hardware (such as additional memory or a peripheral) that you connected
or installed.
WARNING: Do not attempt to open your iMac, except to install memory. If your iMac
needs service, see “Learning More, Service, and Support” on page 62 for information
about how to contact Apple or an Apple Authorized Service Provider for service.
Your iMac doesn’t have any user-serviceable parts, except the memory.