On models without a hard drive, disconnect the speaker cable from the system board (1), and then
remove the five Torx T15 screws (2) that secure the system board to the computer.
Lift the front of the system board (1), and then pull it out of the computer (2).
To install the system board, reverse the removal procedures.
When replacing a system board be sure to install a thermal pad to service the graphics processor on the
system board (1) at the location on the chassis as shown by callout (2) in the following image.
Chapter 4 Removal and replacement procedures