Before You Begin 115
The computer has two memory slots, DIMM A and DIMM B. DIMM A is located on top of the
computer under the keyboard, and DIMM B is located on the bottom of the computer under the
memory module cover. DIMM A holds the basic memory module as configured from the factory. If you
did not order additional memory, DIMM B is empty. Generally, if you add memory, you use DIMM B. If
you are upgrading memory, you may need to install memory in DIMM A and DIMM B, depending on the
extent of the upgrade.
NOTICE: If you need to install memory modules in two connectors, install a memory module in the connector
labeled “DIMMA” before you install a module in the connector labeled “DIMMB.”
DIMM A Connector
To install a memory module in the DIMM A connector:
1
Follow the procedures in "Before You Begin" on page 109.
2
Remove the hinge cover (see "Hinge Cover" on page 113).
3
Remove the keyboard (see "Keyboard" on page 122).
4
Ground yourself by touching one of the metal connectors on the back of the computer.
NOTICE: If you leave the area, ground yourself again when you return to the computer.
5
If you are replacing a memory module, remove the existing module:
NOTICE: To prevent damage to the memory module connector, do not use tools to spread the memory-module
securing clips.
a
Use your fingertips to carefully spread apart the securing clips on each end of the memory module
connector until the module pops up.
b
Remove the module from the connector.
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