Acer 4400 User Manual

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Ejecting the optical (CD or DVD) 
drive tray
To eject the optical drive tray when the computer is turned on, press the drive 
eject button.
When the power is off, you can eject the drive tray by using the emergency 
eject hole.
Using a computer security lock
A security keylock notch, located on the rear of the computer, lets you connect 
a Kensington-compatible computer security lock.
Wrap the computer security lock cable around an immovable object such as a 
table or handle of a locked drawer. Insert the lock into the notch and turn the 
key to secure the lock. Some keyless models are also available.