Dell Precision 5680 Owner's Manual

Installing the system board

About this task

CAUTION:The information in this installation section is intended for authorized service technicians only.

The following image indicates the location of the system board and provides a visual representation of the installation procedure.

NOTE: Replacement of the system board requires further removal of the touchpad FPC and SD Card reader daughter board FPC/USH and SD Card reader daughter board FPC. Refer disassembly procedures of touchpad and SD card reader daughterboard FPC/USH and SD card reader daughterboard FPC for more information.

1. Power button with fingerprint reader cable connector
2. GPU card bridge
3. Display FPC cable
4. Left-speaker cable connector
5. Left-fan cable connector
6. Solid-state drive connector
7. WLAN antennas connector
8. Keyboard backlit cable connector
9. Battery cable connector
10. GPU card FPC interposer board
11. Solid-state drive/VPU card connector
12. Right-fan cable connector
13. Right-speaker cable connector

1. Touchpad cable connector
2. USH I/O board cable connector

1. Align and place the system board on the palm-rest assembly.
2. Replace the nine (M2x4) screws to secure the system board to the palm-rest assembly.
3. Align and place the PC bridge support bracket on the system board.
4. Replace the two (M2x4) screws to secure the PC bridge support bracket in place.
5. Connect the power button with fingerprint reader FPC cable, right speaker cable, front LED FPC cable, and left speaker cable to the connectors on the system board.
6. Adhere the SD-card reader daughterboard FPC/USH and SD-card reader daughterboard FPC cable and touchpad FPC cable on the palm-rest assembly.
7. Connect the touchpad FPC cable to the connector on the touchpad module.
8. For systems shipped with a USH module, connect the USH and SD-card reader daughterboard FPC cable to the connector on the USH and SD-card reader daughterboard.
9. For systems shipped without a USH module, connect the SD-card reader daughterboard FPC cable to the connector on the SD-card reader daughterboard.
10. Align and place the display FPC interposer board on the system board.
    NOTE:The pins on the interposer board are very fragile. Avoid contact with the pins on the board, instead handle the board by lifting and holding from the edges or the sides.
11. Connect the display FPC cable to the connector on the system board.
12. Replace the two (M1.4x4) T5 Torx screws to secure the display FPC in place.
13. Flip close the display FPC cover.
14. Replace the two (M1.4x4) screws to secure the display FPC cover in place.
15. For systems shipped with a WLAN card, route the antenna cables through the metal clips on the system board.
16. For systems shipped with a WLAN card, connect the antenna cables to the connectors on the WLAN module.
17. For systems shipped with a WLAN card, align and place the WLAN bracket on the system board.
18. For systems shipped with a WLAN card, tighten the captive screw to secures the WLAN bracket in place.
19. For systems shipped with a GPU card, align and place the GPU card bridge on the system board.
20. For systems shipped with a GPU card, replace the four (M1.6x4.5) screws to secure the GPU card bridge in place.
21. For systems shipped with a GPU card, align and place the two GPU card FPC interposer boards on the system board.
22. For systems shipped with a GPU card, align and place the GPU card FPC from the system board.
23. For systems shipped with a GPU card, replace the four (M1.4x4) T5 Torx screws to secure the GPU card FPC in place.