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Dell OptiPlex All-in-One Plus 7420 - Installing the power-supply unit

Dell OptiPlex All-in-One Plus 7420
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Steps
1. Press and hold the securing clip and disconnect the processor-power cable from its connector (ATX CPU) on the system
board.
2. Disconnect the control-signal cable from its connector (CTRL) on the system board.
3. Disconnect the system-board power cable from its connector (ATX SYS) on the system board.
4. Remove the three screws (M3x5) that secure the power-supply unit to the display-assembly base.
5. Remove the two screws (M3x5) that secure the power-supply connector cable bracket to the display-assembly base.
6. Lift the power-supply unit, its cables, and the power-supply unit connector off the display-assembly base.
Installing the power-supply unit
Prerequisites
If you are replacing a component, remove the existing component before performing the installation process.
About this task
The following image indicates the location of the power-supply unit and provides a visual representation of the installation
procedure.
Figure 50. Installing the power-supply unit
Removing and installing Customer Replaceable Units (CRUs)
77

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