Apple iMac (21.5 and 27-inch, Late 2009) - Manual (Page 65)

Chapter 5 Last, but Not Least 65
Laser Information for Optical Disc Drives
The optical disc drive in your iMac contains a laser that is safe in normal use but that
may be harmful to your eyes if disassembled. For your safety, have this equipment
serviced only by an Apple Authorized Service Provider.
Important: Electrical equipment may be hazardous if misused. Operation of this
product, or similar products, must always be supervised by an adult. Do not allow
children access to the interior of any electrical product and do not permit them to
handle any cables.
Do Not Make Repairs Yourself
Your iMac has no user-serviceable parts, except the keyboard, mouse, and memory (see
“Installing Memory” on page 37). Do not attempt to open your iMac. If your iMac needs
service, consult the service and support information that came with your computer for
instructions about how to contact an Apple Authorized Service Provider or Apple for
service.
If you open your iMac or install items other than memory, you risk damaging your
equipment. Such damage isn’t covered by the limited warranty on your iMac.
WARNING: Making adjustments or performing procedures other than those specified
in your equipment’s manual may result in hazardous radiation exposure.
WARNING: Never push objects of any kind into this product through the ventilation
openings in the case. Doing so may be dangerous and damage your computer.