c.Gently press the memory module (3) down, applying pressure to both the left and right edges of the memory module, until the retention clips snap into place.

CAUTION: To prevent damage to the memory module, be sure that you do not bend the memory module.

7.Replace the service door (see Replacing the service door on page 49).

8.Insert the battery (see Inserting or removing the battery on page 20).

9.Connect AC power and external devices to the computer.

10.Turn on the computer.

Using optical drives (select models only)

An optical drive, such as a DVD-ROM drive, supports optical discs (CDs and DVDs). These discs store or transport information and play music and movies. DVDs have a higher storage capacity than CDs.

CAUTION: To prevent possible audio and video degradation, or loss of audio or video playback functionality, do not initiate Sleep while reading from a CD or DVD.

If Sleep is initiated during playback of a disc, you may experience the following behaviors:

●Your playback may be interrupted.

●You may see a warning message asking if you want to continue. If this message is displayed, click No.

●You may need to restart the CD or DVD to resume audio and video playback.

Using optical drives (select models only) 55