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Memory module
WARNING! To reduce the risk of electric shock and damage to the equipment, unplug the power
cord and remove all batteries before installing a memory module.
CAUTION: Electrostatic discharge (ESD) can damage electronic components. Before beginning any
procedure, ensure that you are discharged of static electricity by touching a grounded metal object.
NOTE: To use a dual-channel configuration with a second memory module, be sure that both memory
modules are identical.
Description Spare part number
4 GB (DDR3-1600 MHz, PC3-12800) 641369-001
2 GB (DDR3-1600 MHz, PC3-12800) 652972-001
Before removing a memory module, follow these steps:
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 or in
the Sleep state.
1. Shut down the computer.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet
and then unplugging the AC adapter from the computer.
4. Remove the battery (see
Battery on page 33).
5. Remove the service door (see
Service door on page 34).
To add or replace a memory module:
1. Spread the retention clips (1) on each side of the memory module slot to release the memory
module. (The memory module tilts up.)
40 Chapter 4 Removal and replacement procedures ENWW