Replacing the power-supply unitWARNING: Before working inside your computer, read the safety information that shipped with your computer and follow thesteps in Before working inside your computer. After working inside your computer, follow the instructions in After working insideyour computer. For more safety best practices, see the Regulatory Compliance home page at www.dell.com/regulatory_compliance.WARNING: Lift the power-supply unit carefully as it is designed with a tight hinge without a physical lock. It always stays in theupright position while lifted up.Topics:• Procedure• Post-requisitesProcedure1 Place the power supply on the power-supply unit cage.2 Replace the screws that secure the power-supply unit to the power-supply unit cage.3 Align the screw holes on the power-supply bracket with the screw holes on the power-supply unit cage.4 Replace the screws that secure the power supply bracket to the power-supply unit cage.5 Connect the hard-drive power cable.6 Rotate the power-supply unit away from the chassis.7 Connect the CPU-power cable, system-board power cable to the system board and the optical-drive power cable to the optical drive.For more information, see “System-board components”.8 Route the system-board power cable through the routing guide on the chassis.9 Connect the graphics-card power cables if applicable.10 Rotate the power-supply unit towards the chassis until the unit snaps into place.11 Slide the power-supply unit cage release latches to their locking positions to lock the release latches.Post-requisitesReplace the right-side cover.2144 Replacing the power-supply unit
