Power off the Xbox One and unplug all cables
Remove any discs, USB devices, and accessories
Place the console on a clean, flat surface
Remove the side vent panels
Remove the top and bottom outer casing clips
Unscrew the internal screws securing the shell
Lift off the outer casing carefully
Disconnect the internal power supply cables
Remove the hard drive bracket
Disconnect and remove the optical drive
Disconnect the fan connector and remove the fan
Remove the motherboard screws
Lift out the motherboard carefully
Keep screws and parts organized for reassembly