Sony VGN-SZ660N - Manual (Page 145)

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Upgrading Your VAIO Computer
Removing and Installing a Memory Module
To change or add a memory module
1 Shut down the computer and disconnect all peripheral devices.
2 Unplug the computer and remove the battery pack.
3 Wait until the computer cools down.
4 Unscrew the screws (indicated by the arrows below) on the bottom of the computer and remove the memory module
compartment cover.
5 Touch a metal object to discharge static electricity.