Service Manual

Replacing the Power-Supply Unit
NOTE: Before working inside your computer, read the safety information that shipped with your computer and follow the
steps in Before Working Inside Your Computer. After working inside your computer, follow the instructions in After
Working Inside Your Computer. For more safety best practices, see the Regulatory Compliance home page at dell.com/
regulatory_compliance.
Procedure
WARNING: The cables and ports on the back of the power supply 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 and/or
system components.
1. Press and hold the securing tab on the chassis and slide the power-supply unit into the chassis until it snaps into position.
a. securing tab
b. power supply unit
2. Align the notch on the power-supply cover with the tab on the chassis.
3. Slide the power-supply cover towards the tabs until it locks in place.
4. Replace the screws that secure the power-supply unit to the bezel.
5. Connect the power cable to the power-supply unit.
Post-requisites
1. Replace the full length graphics cards.
2. Replace the graphics card.
3. Replace both the left and right side-panels. See “
Removing the Side Panels”.
4. Replace the stability foot.
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