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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 (PC3, 12800, 1600 MHz) 641369-001
2 GB (PC3, 12800, 1600 MHz) 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, in the Sleep state, or in Hibernation.
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn
the computer on, and then shut it down through the operating system.
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 32).
5. Remove the service door (see
Service door on page 33).
To add or replace a memory module:
1. Spread the retaining clips (1) on each side of the memory module slot to release the memory
module. (The memory module tilts up.)
Component replacement procedures 39