Installing The Power-Supply Unit - Dell Precision 7865 Tower Service Manual

Steps
1. Lay the computer on the right side.
2. Disconnect the ATX CPU power-cables from the connectors on the system board.
3. Open the clips on the routing guides on the power-supply cover and remove the CPU ATX power-cables from the clips.
4. Remove the four (#6-32) screws from the power-supply cover.
5. Remove the power-supply cover from the computer.
6. Disconnect the SATA power-cables from the connectors on the system board.
7. Disconnect the PCIe power-cables from the PCIe holder.
8. Open the bottom-air shroud cover and remove the cables from inside it.
9. Remove the four (#6x32) screws that secure the power-supply unit to the chassis.
10. Slide the power-supply unit away from the back of the chassis.
11. Lift the power-supply unit off the chassis.

Installing the power-supply unit

Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
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.
88 Removing and installing components