Hardware Maintenance Manual
Replacing a memory module
5. Remove the 6 screws that secure the stand to the chassis, and then
slide the stand up and out.
Turn off the computer and wait 3 to 5 minutes to let the computer
cool down before removing the computer cover.
It may be helpful to place the computer face-down on a soft flat
surface for this procedure. Lenovo recommends that you use a
blanket, towel, or other soft cloth to protect the touch screen from
scratches or other damage.