Sony PCG-SR27 - Manual (Page 76)

VAIO® Notebook User Guide
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3 Remove the memory module, pulling it out in the direction of the arrow.
Perform Steps 6 and 7 for “Installing a Memory Module” .
Confirming Added Memory Capacity
1 Turn on the notebook.
2 Click the Start button, point to VAIO, and then click Sony Notebook Setup.
3 Click the About This Notebook tab. Check the System Memory displayed in
the left panel to confirm that the correct memory amount is displayed.
If the memory amount on the display is not correct, shut down the system,
turn off the notebook, and repeat the installation procedures.
Removing a Memory Module