Sony PCV-RS310 - Manual (Page 40)

VAIO Computer System Reference Manual 26
Removing the Cover
Removing the cover
1
Shut down your computer and turn off all peripheral devices, such as
your printer.
2
Unplug your computer and disconnect any peripheral devices.
3
Position the system unit so that the back panel is facing towards you.
4
Unscrew the three cover release screws located on the edges of the
back panel and set aside.
Removing the release screws (PCV-RS310 series model shown)