Apple MacBook (13-inch, Early 2009) - Manual (Page 61)

Chapter 5 Last, but Not Least 61
Laser Information for Optical Disc Drives
The optical disc drive in your computer 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 Handling Information
Operating environment Operating your MacBook outside these ranges may affect
performance:
 Operating temperature: 50° to 95° F (10° to 35° C)
 Storage temperature: -4° to 113° F (-20° to 45° C)
 Relative humidity: 5% to 90% (noncondensing)
 Operating altitude: 0 to 10,000 feet (0 to 3048 meters)
Turning on your MacBook Never turn on your MacBook unless all of its internal and
external parts are in place. Operating the computer when parts are missing may be
dangerous and may damage your computer.
WARNING: Making adjustments or performing procedures other than those specified
in your equipment’s manual may result in hazardous radiation exposure.
NOTICE: Failure to follow these handling instructions could result in damage to your
MacBook or other property.