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Latitude 5430 Rugged Service Manual

PDF

Removing the system board

Prerequisites

  1. Follow the procedure in before working inside your computer.
  2. Remove the battery.
  3. Remove the primary M.2 2280 solid state drive or primary M.2 2230 solid state drive.
  4. Remove the keyboard.
  5. Remove the base cover.
  6. Remove the Wi-Fi I/O board.
  7. Remove the WLAN card.
  8. Remove the WWAN card.
  9. Remove the dock I/O board.
  10. Remove the rear I/O board.
  11. Remove the fan.
  12. Remove the heat-sink (UMA) or heat-sink (discrete).

About this task

The following image indicates the connectors on your system board.

This image displays the System board layout - front side

  1. Power button board cable connector
  2. Wi-Fi I/O board connector
  3. WWAN card connector
  4. Rear I/O daughter board connector
  5. WLAN card connector
  6. eDP cable connector
  7. Fan cable connector
  8. Lid cable connector
  9. Dock I/O flat printed cable connector
  10. USH board connector
  11. M.2 2230/2280 solid state drive connector
  12. Right battery cable connector
  13. Left battery cable connector
  14. LED board cable connector
  15. Coin-cell battery cable connector

This image displays the System board layout - rear side

  1. Left Type-C cable connector
  2. Right Type-C cable connector
  3. Memory module connector
  4. Memory module connector
  5. Left Type-C flat printed cable connector
  6. Right Type-C flat printed cable connector
  7. Keyboard cable connector
  8. Touchpad cable connector
  9. Backlight flat printed cable connector
  10. Left I/O flat printed cable connector

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

This image displays the removal of system board screws

This image displays the removal of system board cables

This image displays the removal of system board

Steps

  1. NOTE:The following epoxy screw locations will require additional focus. These screws are difficult to remove and there may be damage during the removal process. To prevent damage to the screws and surrounding plastics, please use the correct screwdriver for each screw type.
    Remove the two epoxy cap (4-40x6.5) screws that secure the serial RS-232 port to the system chassis.
    To remove the epoxy cap screws use a 5.5 mm hex socket wrench.
  2. Remove the serial RS-232 port from the system chassis.
  3. Remove the four (M2x3.5) screws that secure the cable cover to the system board.
  4. Remove the screw (M2x3.5) that secures the Type-C cable cover to the system board.
  5. Disconnect the right and left Type-C cables from their connectors on the system board.
  6. Disconnect the right Type-C, left Type-C and touchpad flat printed cables from their connectors on the system board.
  7. Disconnect and remove the Wi-Fi board cable from its connector on the system board.
  8. Disconnect and remove the LAN flat printed cable from its connector on the system board.
  9. Disconnect the following cables from their connector on the system board (L-R): power button board, eDP, secondary daughterboard, LED board, and coin-cell battery from the system board.
  10. Remove the nine (M2.5x5) screws that secure the system board to the system chassis and flip the system board.
  11. Disconnect the left I/O flat printed cable connector from the system board.

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