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Vostro 3681 Service Manual

Installing the power-supply unit


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 provides a visual representation of the installation procedure.

Installing the power-supply unit

Installing the power-supply unit

Installing the power-supply unit


  1. Slide the power-supply unit into the chassis until the securing tab snaps into position.
  2. Replace the three screws (#6-32) that secure the power-supply unit to the chassis.
  3. Route the power cable through the routing guides on the chassis and connect the power cables to their respective connectors on the system board.

Next steps

  1. Install the HDD/ODD Bracket.
  2. Install the front bezel.
  3. Install the side cover.
  4. Follow the procedure in After working inside your computer.

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