Remove the two (2) 10.5mm standoffs with a #4 flat head bit

Remove the three (3) 4.5mm screws with a #1 philips bit

Disconnect the power connector

during the next step you will be removing the main board and the system board as a single assembly. be careful to support the lower board so you dont damage the connector

tilt the board up from the left and slide the board up and out making sure not to damage the case and metal clips on the right.