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XPS 14 9440 Owner's Manual

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Removing the system board

CAUTION:The information in this removal section is intended for authorized service technicians only.

Prerequisites

  1. Follow the procedure in Before working inside your computer.
  2. Remove the base cover.
  3. Remove the M.2 2230 solid-state drive or M.2 2280 solid-state drive from the M.2 SSD slot, whichever is applicable.
  4. Remove the battery.
  5. Remove the display assembly.
  6. Remove the heat-sink assembly - for computers shipped with integrated graphics board or heat-sink assembly - for computers shipped with discrete graphics board, whichever is applicable.

About this task

The following image indicates the connectors and components on your system board.
Figure 1. System-board connectors
Image: System board connectors
  1. Touch function row cable connector (JTF1)
  2. Display-assembly cable connector (JEDP1)
  3. Integrated wireless card cable connector
  4. Left-fan cable connector (JFAN2)
  5. Left-speaker cable connector (JSPK2)
  6. Haptic-module cable connector (JTP1)
  7. Battery cable connector (BATT)
  8. M.2 solid-state drive slot
  9. Keyboard-control board cable connector (JIO1)
  10. Right-speaker cable connector (JSPK1)
  11. Right-fan cable connector (JFAN1)
  12. Power-button and fingerprint-reader cable connector (JFP1)

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

Figure 2. Removing the system board
Image: Removing the system board
Figure 3. Removing the system board
Image: Removing the system board

Steps

  1. Open the latch of the capacitive touch-panel connector (JTF1) and disconnect the capacitive touch-panel cable from the system board.
  2. Loosen the captive screw that secures the wireless-module bracket to the system board.
    NOTE:Ensure that the small, clear washer that holds the captive screw in place does not fall.
  3. Lift the wireless-module bracket off the system board.
  4. Disconnect the antenna cables from the wireless module.
  5. Lift the latch of the power-button and fingerprint-reader cable and disconnect the power-button and fingerprint-reader cable from their respective connectors on the system board.
  6. Use the pull tab to disconnect the left-speaker cable from the left-speaker cable connector (JSPK2) on the system board.
  7. Open the latch of the keyboard control-board cable and use the pull tab to disconnect the keyboard control-board cable from the keyboard control-board connector (JIO1) on the system board.
  8. Open the latch of the haptic-module cable and use the pull tab to disconnect the haptic-module cable from the haptic-module cable connector (JTP1) on the system board.
  9. Use the pull tab to disconnect the right-speaker cable from the right-speaker cable connector (JSPK1) on the system board.
  10. Remove the 11 screws (M1.6x3.5) that secure the system board to the palm-rest assembly.
  11. Hold the system board by the short edges, and lift the board off the palm-rest assembly with care.

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