Sony VGN-CR31E/L User Manual page 128

9 Replace the memory module compartment cover.
10 Tighten the screws on the bottom of the computer.
!
Do not install the screw (1) in step 4 into other screw holes, as doing so may cause damage to your computer because the length of the screw (1) is
longer than that of other screws (2).
11 Reinstall the battery pack and turn on the computer.
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Upgrading Your VAIO Computer
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