Precision 7770 Service Manual

Installing the system board

1. Adhere the coin-cell battery to the palmrest and then place the system board on its slot on the computer.
2. Replace the four stand-off nuts (M2x3.5) to secure the CAMM memory.
   NOTE:This step is only applicable for configurations with CAMM memory.

   NOTE:In case of system board replacement, these four stand-off nuts need to be transferred from the old system board to the new system board.
3. Replace the seven (M2x5) screws to secure the system board to the computer chassis.
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 power button board FFC from the system board, touchpad FFC, USH daughter board FFC (for models shipped with a USH daughter board), and SD card reader FPC cables.
7. Connect the touch screen cable (for models shipped with a touch screen) or IR camera cable (for models that are shipped with an IR camera) and display cable to their connectors on the system board.
8. Replace the three (M2x5) screws to secure the display cable bracket in place.
9. Align the screw holes, and replace the four (M2x6) screws to secure the two PCB beam connectors to the system board and the GPU card.
   NOTE:For models shipped with an integrated GPU card, the PCB beam connectors are on the bottom and top-right side of the GPU card. For models shipped with a discrete GPU card, the PCB beam connectors are at the bottom side of the GPU card.
10. Connect the GPU power cable to the connector on the system board on the top side of the computer.
11. Lock the GPU power cable connector on the system board.
12. Connect the antennas to their connectors.
13. Replace the (M2x5) screw to secure the WLAN bracket to the system board.