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.
8.Replace the bottom cover (see Removing or replacing the bottom cover on page 34).
9.Insert the battery (see Inserting or removing the battery on page 32).
10.Connect AC power and external devices to the computer.
11.Turn on the computer.
Adding or replacing the primary memory module underneath the keyboard
CAUTION: To prevent information loss or an unresponsive system:
Shut down the computer before adding or replacing memory modules. Do not remove a memory module while the computer is on, in the Sleep state, or in Hibernation.
If you are not sure whether the computer is off or in Hibernation, turn the computer on by pressing the power button. Then shut down the computer through the operating system.
To add or replace the primary memory module underneath the keyboard:
1.Save your work and shut down the computer.
2.Disconnect AC power and external devices connected to the computer.
3.Turn the computer upside down on a flat surface, with the battery bay away from you.
4.Remove the battery (see Inserting or removing the battery on page 32).
5.Remove the bottom cover (see Removing or replacing the bottom cover on page 34).