Dell Precision 3930 Rack Service Manual page 71

NOTE: Take a picture or document the cable routing.
a Disconnect the power daughter board cable and front panel cable [1], power daughter board power cable [2], front panel HSD
cable, SATA power cable, SATA 0, SATA 1 (if installed) cable [3] and unroute it from the retention clip on the system board.
b Disconnect front panel power cable, GPU power cable [4] and unroute it from the retention clip on the system board.
c Disconnect the SATA 2 power cable and the SATA 2, SATA 3 (if installed) cable [5] and lift to gain access to disconnect the GPU
fan cables.
4 To remove the system board screws and system board:
5 Remove the nine #6 32 screws that secure the system board [1], lift the front of the system board, gently pull it toward the front of
the chassis to disengage the connectors from the rear wall, and lift it out of the chassis. .
NOTE: The system board connectors have to be pulled out of the rear wall before the system board can be removed.
Removing and installing components 71