Sony PCG-SR7K - Manuel (Page 77)

Adding Memory $#
Use the Phillips (+) screwdriver to tighten all six screws at the
locations shown below.
Removing a Memory Module
1
Turn off the computer and all peripheral devices. Disconnect the
power cord and all cables from the computer, and then remove the
battery.
2
Perform Steps 2 and 3 for "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.
3
Remove 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.
Carefully press down on the release tabs on either end of the memory
module at the same time.
Pull out the memory module in the direction of the arrow.
Perform Steps 6 and 7 for "Installing a Memory Module".