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Precision 7750 Service Manual

PDF

Removing the system board

Prerequisites

  1. Follow the procedure in before working inside your computer.
  2. Remove the SD card.
  3. Remove the SSD door.
  4. Remove the secondary M.2 SSD.
  5. Remove the base cover.
  6. Remove the battery.
  7. Remove the primary M.2 SSD.
  8. Remove the SIM card.
  9. Remove the secondary memory.
  10. Remove the WWAN card.
  11. Remove the WLAN card.
  12. Remove the keyboard lattice.
  13. Remove the keyboard.
  14. Remove the primary memory.
  15. Remove the heat-sink assembly.
  16. Remove the inner frame.

About this task

The figure indicates the location of the system board and provides a visual representation of the removal procedure. Images to be uploaded in the next review cycle.

NOTE For discrete models shipped with GPU card:

Removing the system board

Removing the system board

Steps

  1. Carefully pry the GPU power cable connector outside the end of the connector head to unlock the GPU power cable connector from the system board on top side of the system.
  2. Slightly slide the GPU power cable connector outwards to disconnect the GPU power cable from the connector on the system board.
  3. Disconnect the speaker cable and the SD card reader cable from the connectors on the system board.
  4. Disconnect the touch screen cable (for models shipped with a touch screen) or IR camera cable (for models shipped with an IR camera), power adapter cable, touchpad cable, USH daughter board cable (for models shipped with a USH daughter board), and power button board cable from the system board.
  5. Remove the (M2x3) screw that secures the Darwin cable bracket in place.
  6. Remove the Darwin cable bracket.
  7. Disconnect the Darwin cables from the connectors on the system board.
  8. Remove the six (M2x3) screws that secure the three beam connectors in place on the bottom of the system.
    NOTE This step is applicable for discrete models shipped with 256 MB VRAM GPU card.
  9. Remove the four (M2x3) screws that secure the two beam connectors in place on the bottom of the system.
    NOTE This step is applicable for discrete models shipped with 128 MB VRAM GPU card.
    NOTEFor UMA models, remove the two (M2x3) screws that secure the single beam connector in place on the bottom of the system.
  10. Remove the beam connectors from the computer.
  11. Remove the (M2x5) screw that secures the display cable bracket in place.
  12. Remove the display cable bracket from the computer.
  13. Disconnect the display cable from the connector on the system board.
  14. Remove the four (M2x5) screws that secure the system board to the computer.
  15. Pry the coin-cell battery, located under the system board, from the palmrest while lifting the system board.
  16. Remove the system board from the computer.

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