Notes on Use
Adding Memory
Sony Notebook Computer User Guide
n N 78 
To remove a memory module
1Turn off the computer and all peripheral devices. Disconnect the power cord and all cables from the computer, and then remove the battery packs.
2Perform the steps 2 and 3 of "Installing a Memory Module".
The computer interior becomes extremely hot during operation. Wait about one hour for the computer to cool down before you remove the screws.
3Remove the memory module.
Before you handle the memory module, touch a metal part of the computer to discharge any static electricity accumulated on your body.
1Carefully press down on the release tabs on either end of the memory module at the same time.
2Pull out the memory module in the direction of the arrow.
4Perform the steps 6 and 7 of "Installing a Memory Module".