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Latitude 3340/Latitude 3340 2-in-1 Service Manual

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Installing the system board

Prerequisites

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

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

Image of installing the system board - part 1

Image of installing the system board - part 2

CAUTION:The system has a coin-cell battery that is connected to the I/O board. Disconnecting the I/O board cable resets the BIOS setup program settings to default. Note the BIOS setup program settings before disconnecting the I/O board cable.

Steps

  1. Align and place the system board on the palm-rest and keyboard assembly.
  2. Align the screw holes on the system board with the screw holes on the palm-rest and keyboard assembly.
  3. Replace the two screws (M2x2) to secure the system board to the palm-rest and keyboard assembly.
  4. Connect the following cables to the respective connectors on the system board:
    1. Touchpad cable
    2. I/O board cable
    3. Speaker cable
    4. Thermal fan cable
    5. Display cable
    6. Power adapter port cable
  5. Align and place the USB type-C bracket on the system board.
  6. Align the screw holes on the USB type-C bracket with the screw holes on the system board.
  7. Replace the screw (M2.5x4) to secure the USB type-C bracket to the system board.
  8. Gently press the right display hinge in downward direction towards the system board.
  9. Align the screw holes on the right display hinge with the screw holes on the system board.
  10. Replace the two screws (M2.5x4) to secure the right display hinge to the system board.
  11. Align and place the display-cable bracket on the display-cable connector on the system board.
  12. Replace the two screws (M2.5x4) to secure the display-cable bracket to the system board.

Next steps

  1. Install the thermal heat-sink.
  2. Install the thermal fan.
  3. Install the wireless card.
  4. Install the M.2 2230 solid-state drive or the M.2 2280 solid-state drive, whichever applicable.
  5. Install the battery.
  6. Install the base cover.
  7. Follow the procedure in After working inside your computer.

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