Sony PCG-SR33 - Manual (Page 75)

To Remove a Memory Module
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8 Close the display panel and replace the six (6) screws on the bottom of the
notebook.
9 Use the Phillips (+) screwdriver to tighten all six screws at the locations
shown below.
To Remove a Memory Module
1 Perform steps 1 through 3 of “To Install a Memory Module” .
2 Touch a metal object (such as the connector panel on the back of your
notebook) to discharge static electricity.
Aligning the Palm Rest
Notch on Keyboard