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User’s Manual
8-8
O
PTIONAL
D
EVICES
Memory expansion
You can install additional memory in the computer’s memory module to increase
the amount of RAM.
CAUTION: Only memory modules with the following parts numbers
can be installed:
256MB: PA3389U-1M25
512MB: PA3412U-1M51
1GB: PA3411U-1M1G
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.
CAUTIONS: 1. If you use the computer for a long time, the memory mod-
ules will become hot. In this case, let the memory modules
cool to room temperature before you replace them.
2. Do not try to install a memory module with the computer
turned on or turned off in Standby and Hibernation mode.
You can damage the computer and the memory module.
3. If you install a memory module that is not compatible
with the computer, a beep will sound when you turn on the
power. If the module is installed in slot A, there will be a
long beep followed by a short beep. If the module is in
slot B, there will be a long beep followed by two short
beeps. In this case shut down the power and remove the
incompatible module.
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.
Note: Use a point size 0 Phillips screwdriver.