Put on Anti Static Wrist Strap.

It is always a good idea to ground yourself when working with electronics to prevent static buildup. You wear this strap to protect you and your device from accidental electrostatic discharge (ESD) damage during repairs.]

Flip Computer Upside down.

Unscrew the eight 3.3mm black screws on the back casing with the T4 Torx Screwdriver.