This guide will show you how to teardown the handle to access the power button and motherboard.
Remove the single 15mm Phillips #1 screw from the handle.
Remove the handle by pulling it up.
Remove two 15mm Phillips #1 screws from the handle.
Use a plastic opening tool to carefully pry the black cover off of the handle.
Remove five 15mm Phillips #1 black screws from the handle.
Remove the silver plastic cover using the plastic opening tool.