Dell OptiPlex 7040 - Installing the power supply unit (PSU); Removing the power switch

Installing the power supply unit (PSU)
1. Insert the PSU in the chassis and slide it toward the back of the computer to secure it.
2. Tighten the screws to secure the PSU to the back of the computer.
3. Route the PSU cables through the retention clips.
4. Connect the power cables to the system board.
5. Install the:
a. fan duct
b. optical drive
c. hard drive assembly
d. front bezel
e. cover
6. Follow the procedure in After Working Inside Your Computer.
Removing the power switch
1. Follow the procedure in Before Working Inside Your Computer.
2. Remove the:
a. cover
b. front bezel
c. hard drive assembly
d. optical drive
e. power supply unit
3. To remove the power switch:
a. Disconnect the power switch cable from the system board [1].
b. Press the power switch retention tabs and remove it from the chassis [2] [3].
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