Dell Precision 3660 Tower Service Manual page 54

WARNING: The cables and ports on the back of the power-supply unit are color-coded to indicate the different
power wattage. Ensure that you plug in the cable to the correct port. Failure to do so may result in damaging the
power-supply unit and/or system components.
About this task
The following images indicate the location of the power-supply unit and provide a visual representation of the installation
procedure.
Steps
1. Slide the power-supply unit into the chassis until the securing tab snaps into position.
2. Replace the four (M6x32) screws to secure the power-supply unit to the chassis.
3. Route the power cable through the routing guides on the chassis and connect the power cables to the connectors on the
system board.
Next steps
1. Install the side cover.
2. Follow the procedure in
54 Removing and installing components
after working inside your computer.