Dell Latitude 9520 2-in-1 Service Manual page 29

NOTE: Replacement system boards are pre-assembled with heat sink and fan. Do not remove the heat sink and fan from
system board. The system board can be replaced together with the heat sink and fan attached.
Steps
1. Remove the single (M1.6x3.5) screw that secures the display-cable bracket to the system board.
2. Push the display-cable bracket from the bottom edge to release the bracket from the securing peg, and remove it from the
system.
3. Disconnect the display cable and camera cable from the system board.
NOTE: Users must disconnect the display cable from the system board by pulling the pull tab in a direct upward motion
to prevent damage to the connector.
4. Remove the single (M1.6x4.5) screw that secures the wireless module bracket to the system board.
5. Lift and remove the wireless module bracket away from the system board.
6. Use a plastic scribe and disconnect the Darwin antenna cables from the wireless module, then unroute the cables from the
routing guides on the system board.
7. Disconnect and unroute the WWAN antenna cable from the routing guides on the system board.
8. Remove the two (M2.5 x 5) screws that secure the two system board hooks to the system board.
9. Disconnect the USH daughter board FFC cable, WWAN Darwin cable, and touchpad FPC from the connector on the system
board.
NOTE: To disconnect the WWAN Darwin cable from the system board, insert a plastic scribe close to the rear side of
the connector, and carefully pry in an upward direction.
10. Disconnect the I/O daughter board data FPC cable and the I/O daughter board data cable.
11. Remove the ten (M1.6x3.5) screws that secure the system board to the palmrest and keyboard assembly and remove the
system board from the system.
Removing and installing components 29