Dell Precision 7550 Instructions De Service page 63

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.
Démontage et remontage 63