Expansion memory module
Description Spare part number
4096-MB memory module (PC3-10600, 1333-MHz, DDR3) 599092-001
2048-MB memory module (PC3-10600, 1333-MHz, DDR3) 598856-001
NOTE: A memory module must be installed in the right expansion memory module slot before a
memory module is installed in the left expansion memory module slot.
Before removing an expansion memory module, follow these steps:
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 46).
5. Remove the memory module/wireless module compartment cover (see 
WLAN module
on page 55).
Remove an expansion memory module:
1. Spread the retaining tabs (1) on each side of the expansion memory module slot to release the
expansion memory module. (The edge of the module opposite the slot rises away from
the computer.)
58 Chapter 4   Removal and replacement procedures ENWW