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Dell Vostro 3900/3902 Owner's Manual

PDF

Removing The Power Supply Unit (PSU)

  1. Follow the procedures in Before Working Inside Your Computer .
  2. Remove the:
    • cover
    • bezel
  3. Disconnect the following power supply cables from the system board by pressing on the retention latch and lifting it upwards.
    • system board power cable [1]
    • system fan power cable [2]
    1. Remove the screws that secure the power supply to the computer.
    Figure displaying the removal of the power supply cables.
  4. Follow the steps below to remove the power supply unit:
    1. Push-in on the blue release tab beside the power supply [1].
    2. Slide the power supply unit towards the back and remove it from the computer.
    Figure displaying the removal of the power supply unit from the computer.

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