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Dell Vostro 3900/3902 Owner's Manual

PDF

Installing the Power Supply Unit (PSU)

  1. Slide the PSU towards the back of the computer until it snaps into place.
  2. Replace the screws to secure the power supply until to the computer.
  3. Connect the power cables to the system board.
  4. Install the cover.
  5. Follow the procedures in After Working Inside Your Computer.

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