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User’s Manual 8-7
Optional Devices
O
PTIONAL
D
EVICES
Memory expansion
You can install additional memory in the computer’s memory module to increase
the amount of RAM.
Installing memory module
To install a memory module, make sure the computer is in boot mode then:
1. Turn the computer off in boot mode. Refer to the Turning off the power sec-
tion in Chapter 3.
2. Remove all cables connected to the computer.
3. Turn the computer upside down and remove the battery pack (refer to
Chapter 6, Power and Power-Up Modes.)
4. Remove one screw securing the memory module cover.
5. Lift off the cover.
Only memory modules with the following parts numbers can be
installed:
512MB: PA3511U-1M51
1GB: PA3512U-1M1G
2GB: PA3513U-1M2G
❑ If you use the computer for a long time, the memory modules
will become hot. In this case, let the memory modules cool to
room temperature before you replace them.
❑ Do not try to install a memory module with the computer
turned on or turned off in Sleep and Hibernation mode. You
can damage the computer and the memory module.
❑ Use a point size 0 Phillips screwdriver.
❑ Insert the two memory modules of the same specifications
and capacity into Slot A and Slot B respectively. The com-
puter will operate in dual channel mode. You can access the
inserted memory modules efficiently in dual channel.