First, unplug the battery connector

Then, undo the 8 clips that hold the board to the front casing with the flathead driver.

For the lower clips, you might need a slightly bigger flathead.

After that, just lift the board up.

Be careful not to break the wires that go to the vibration motors, as they are soldered to the board.

To remove the vibration motors, just pull them out, being careful not to break the wires.