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Precision 7750 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 figure indicates the location of the system board and provides a visual representation of the installation procedure.

Installing the system board

Installing the system board

Steps

  1. Adhere the coin-cell battery to the palmrest and then place the system board on its slot on the palmrest.
  2. Replace the four (M2x5) screws to secure the system board to the palmrest.
  3. Connect the display cable, 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 FFC (for models shipped with a USH daughter board), and power button board cable to the connectors on the system board.
  4. Replace the display cable bracket on the display cable.
  5. Replace the (M2x5) screw to secure the display cable bracket to the system board.
  6. Connect the Darwin cables to the connectors on the system board.
  7. Replace the Darwin cable bracket on the Darwin cable connector.
  8. Replace the (M2x3) screw to secure the Darwin cable bracket to the system board.
  9. Connect the beam connectors on the system board.
    NOTE
    • For UMA models, replace the two (M2x3) screws to secure the single beam connector in place on the bottom side of the system.
    • For discrete models shipped with a 128 MB vram GPU card, replace the four (M2x3) screws to secure the two beam connector in place on the bottom side of the system.
    • For discrete models shipped with a 256 MB vram GPU card, replace the six (M2x3) screws to secure the three beam connector in place on the bottom side of the system.
  10. Connect the speaker cable and SD card reader cable to the connectors on the system board.
  11. Connect the GPU power cable to the connector on the system board on the top side of the
  12. Lock the GPU power cable connector on the system board.

Next steps

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

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