Step 37
Lift the left side of the case partly up so that you can access and disconnect the audio in/out cables from the sound card in the upper right of the case.
Be careful not to lift the upper casing too far before you have disconnected the audio in/out cables or you may damage the sound card.
Remove the upper casing. Note that there are two tabs on the laptop's front that often cause the upper case to stick.
Step 38
Your laptop should look approximately like this.
Step 39 — Power Card
Remove the two long silver Torx screws from the power card in the center of the laptop