This guide will show you how to remove the power switch connected to the motherboard. Steps can be followed in reverse to install a new power switch.
Remove the six screws located on the underside of the system using the Gamebit 4.5mm screwdriver.
Carefully flip the unit back over.
Locate the seam. Lift and separate the upper half of the case from the lower half of the case.
Remove the two 11.7 mm Phillips #2 screws connecting the power switch to the motherboard.
Carefully pull the connector from its socket on the motherboard. You may need to wiggle it out as you pull.