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OptiPlex 7490 All-In-One Service Manual

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Removing the power-supply unit (PSU)

Prerequisites

  1. Follow the procedure in Before working inside your computer.
  2. Remove the stand.
  3. Remove the cable cover (optional).
  4. Remove the back cover.
  5. Remove the system-board shield.
  6. Remove the bottom cover.

About this task

The following image indicates the location of the PSU and provides a visual representation of the PSU removal procedure.

Image: Removing the power-supply unit (PSU)

Image: Removing the power-supply unit (PSU)

Image: Removing the power-supply unit (PSU)

Steps

  1. Remove the screw (M3x5) that secures the power-supply socket to the rear-I/O bracket.
  2. Slide the power-supply socket out of the rear-I/O bracket.
  3. Remove the power-supply cable from the routing guides on the rear-I/O bracket and PSU fan.
  4. Disconnect the power-supply cable from the connector on the system board.
  5. Remove the screw (M3x5) that secures the PSU to the display-assembly base.
  6. Lift the PSU out of the system.

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