Use a Phillips #0 screwdriver to remove the 16 screws highlighted. There are 12 M2.5 x 8 mm long screws, and 4 M2 x 2 mm long screws.

Use a Phillips #0 screwdriver to remove the 10 mm screw (highlighted in orange) that secures the disc drive.

Quickly survey and make sure all screws on the back panel are removed from the device.