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Latitude 3120/Latitude 3120 2-in-1 Service Manual

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Removing the system board

Prerequisites

  1. Follow the procedure in before working inside your computer.
  2. Remove the palmrest and keyboard assembly.
  3. For systems that are shipped with a Solid State Drive (SSD), remove the solid-state drive.
  4. Remove the heatsink assembly.
  5. For systems shipped with a world-facing camera, remove the world-facing camera.

About this task

The following images indicate the location of the system board and provide a visual representation of the removal procedure.

Connect the cables onto the system board.

Install the system board and tighten the screws.

Connect the cables onto the system board.

Steps

  1. Remove the singe screw (M2x3) that secures the WLAN antenna cable bracket to the system board.
  2. Lift and remove the WLAN antenna cable bracket from the system board.
  3. Disconnect the two antenna cables that are connected to the WLAN module on the system board.
  4. Remove the singe screw (M2x3) that secures the display cable bracket to the system board. Lift and remove the display cable bracket from the system board.
  5. Open the latch and disconnect the display cable from the connector on the system board.
  6. For 2-in-1 systems, disconnect the touch cable from the connector on the system board.
  7. Disconnect the power adapter port cable from the connector on the system board.
  8. Disconnect the speaker cable and the audio board cable from their connectors on the system board.
  9. For systems that are shipped with a USB Type-C port, remove the three screws (M2x4) that secure the USB Type-C bracket to the system board.
  10. For systems that are shipped with a USB Type-C port, lift and remove the USB Type-C bracket from the system board.
  11. Remove the two screws (M2x3) that secure the USB Type-A bracket to the system board.
  12. Lift and remove the USB Type-A bracket from the system board.
  13. For systems that are shipped with a USB Type-C port, remove the four screws (M2x3) that secure the system board to the computer chassis.
  14. For systems that are shipped without a USB Type-C port, remove the six screws (M2x3) that secure the system board to the computer chassis.
  15. Disconnect the coin cell battery cable from the connector on the system board.
  16. Pry the coin cell battery to release it from the adhesive. Lift and remove it from the system board.
  17. Carefully slide the system board out of the computer.
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