Before you start, read Generic Safety and Compliance Notices, and print the following instructions.

Hazardous moving parts. Keep fingers and other body parts away.
Never remove the cover on a power supply or any part that has the following label attached.


Hazardous voltage, current, and energy levels are present inside any component that has this label attached. There are no serviceable parts inside these components. If you suspect a problem with one of these parts, contact a service technician.
Turn off the computer and remove all connected devices and cables.
Remove the power cord. See Power cord.
Remove the right computer cover. See Right computer cover.
Disconnect the power supply cables from the system board.


