Unplug and power off your device.

Touch a grounded object like a metal fridge to discharge any static electricity. Do not do the repair on carpeted floors, do the repair preferably on wooden floors.

The screws circled in red are 7mm M2.5's. The screws circled in orange are 4mm M2.5's.

Remove the screws with your Phillips #0 screwdriver.

Wedge an opening card (recommended) or spudger into the ridges of the case and carefully pop off the clips securing the back cover and make sure to not break any clips.

Remove the back cover.