Sony VAIO VGN-SZ400 Series User Manual page 165

9 Slide the memory module into the memory module slot and push it in until it clicks into place.
!
Do not touch any other components on the motherboard.
Do not damage the insulation sheet equipped for module protection.
10 Replace the memory module compartment cover.
11 Tighten the screws on the bottom of the computer.
12 Reinstall the battery pack and turn on the computer.
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Upgrading Your VAIO Computer
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