Sony VGN-TX750P - Manual (Page 122)

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Upgrading Your VAIO Computer
VGN-FJ200 Series models
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.
3 Wait until the computer cools down.
4 Unscrew the screw at the bottom of the computer.
5 Touch a metal object (such as the connector panel on the back of the computer) to discharge static electricity.