Sony PCG-748 - Manual (Page 101)

VAIO Notebook Computer User Guide
If the additional memory is not shown, repeat steps 1-9.
To remove a memory module
1 Shut down your computer and disconnect all peripheral devices.
2 Unplug your computer and remove the battery packs.
3 Turn your computer upside down and open the cover on the bottom.
4 Remove the memory module.
Q] Puli the tabs in the direction of the arrow. The memory rnodtile is released,
g Pull the memory module in thr; direction of thrj arrow.
5 Close the cover.