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Inspiron 7405 2n1 Service Manual

PDF

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 image indicates the connectors on your system board.

Figure 1. System-board connectors
Image: System board connectors
  1. Power-adapter port cable
  2. Display cable
  3. Fan cable
  4. I/O-board cable
  5. Speaker cable
  6. Touchpad cable
  7. Keyboard cable
  8. USB Type-C port bracket

The following image indicates the location of the system board and provides a visual representation of the installation procedure.

Image: Installing the system board

Image: Installing the system board

Steps

  1. Align and place the system board on the palm-rest and keyboard assembly.
  2. Replace the two screws (M2x2) that secure the system board to the palm-rest and keyboard assembly.
  3. Connect the display cable to the connector on the system board and close the latch to secure the cable.
  4. Adhere the tape that secures the display cable to the system board.
  5. Connect the power-adapter port cable to the connector on the system board.
  6. Align the screw holes on the USB Type-C port bracket with the screw holes on the system board.
  7. Adhere the tape that secures the USB Type-C port bracket to the system board.
  8. Replace the two screws (M2x3) that secure the USB Type-C port bracket to the system board.
  9. Connect the keyboard cable to the connector on the system board and close the latch to secure the cable.
  10. Connect the touchpad cable to the connector on the system board and close the latch to secure the cable.
  11. Connect the speaker cable to the system board.
  12. Connect the I/O-board cable to the connector on the system board and close the latch to secure the cable.
  13. Adhere the tape that secures the I/O-board cable to the system board.
  14. Connect the fan cable to the system board.
  15. Close the right display hinge.
  16. Replace the three screws (M2.5x5) that secure the right display hinge to the system board.

Next steps

  1. Install the heat sink.
  2. Install the fan.
  3. Install the M.2 2230 solid-state drive or M.2 2280 solid-state drive, as applicable.
  4. Install the memory modules.
  5. Install the coin-cell battery.
  6. Install the battery.
  7. Install the base cover.
  8. Follow the procedure in After working inside your computer.

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