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Reverse this procedure to install the keyboard.
Primary memory module
NOTE: Primary memory is installed under the keyboard.
A computer having a system board with spare part number 652637-001, 656213-002, 684318-001, or
684320-001 has two memory slots (primary memory slots). When adding or replacing memory
modules, slot 1 must be populated before slot 2 is populated.
A computer having a system board with spare part number 652638-001, 656214-002, 684319-001, or
684321-001 has four memory slots (expansion memory slots) (on the bottom of the computer) and
the primary memory slots (under the keyboard). Slot 2 cannot be populated if slot 1 is not populated.
Description Spare part number
2 GB (PC3-10600, 1333 MHz, DDR3) 621565-001
4 GB (PC3-10600, 1333 MHz, DDR3) 621569-001
8 GB (PC3-10600, 1333 MHz, DDR3) 634091-001
Before removing a 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 48).
5. Remove the service access cover (see
Service access cover on page 50).
6. Remove the following components:
a. Hard drive (see
Hard drive on page 60)
b. Keyboard (see
Keyboard on page 67)
Remove the memory module:
1. Spread the retaining tabs (1) on each side of the memory module slot to release the memory
module. (The edge of the module opposite the slot rises away from the computer.)
Component replacement procedures 69