Dell Latitude 7424 Rugged Extreme Service Manual

Removing the System board

1. Follow the procedure in Before working inside your computer.
2. Remove the:
   1. Batteries
   2. Bottom chassis cover
   3. Keyboard
   4. PCIe heatsink assembly
   5. Docking port assembly
   6. Primary SSD
   7. Secondary SSD
   8. Heat Sink
   9. Memory
   10. WLAN card
   11. WWAN card
   12. GPS module
   13. Primary SSD rail
   14. Battery bay
   15. Rear I/O board
3. Peel off the tape [1], disconnect and lift the SSD-ODD assembly [2] from the system board.
4. Peel off the tape [3] from touch pad connectors and disconnect it from the system board [4].
   
5. Open the rear I/O door [1] and remove the two epoxy cap screws from the serial port on the system board [2].
   
6. Open the rear I/O door [1] and remove the two epoxy caps screws in the rear I/O space [2].
   
7. Remove the single 'M2*3' screw [1] to unroute the DC-in cable [2] from the screw post.
8. Disconnect the DC-in connector [3] from the system board.
   
9. Remove the two 'M2*3' screws [1] on EDP bracket and remove the EDP bracket [2] to disconnect the EDP cable [3].
   
10. Peel off the tape [1] and disconnect the rear I/O board FPC connector [2] from the system board.
11. Peel off the tape [3] and disconnect the battery indicator LED cable [4].
12. Peel off the tape [5] and disconnect the dock board FPC connector [6] from the system board.
    
13. Peel off the tape [1] to disconnect the left I/O board FPC connector [2] and pass it through the wall bridge [3].
14. Peel off the tape on the express card FPC connectors [4] and an extra tape on the connector [5] on the system board.
15. Disconnect the express card FPC connector [6] and pass it through the wall bridge [7].
    
16. Peel off the tape [1] and disconnect the power button FPC connector [2] from the system board.
17. Peel off the tape [3] and disconnect the USH board FPC and touch pad connectors [4] from the system board.
    
18. Remove the two 'M2.5*5' screws and two 'M1.6*3.0' screws [1] from the USB Type-C bracket.
19. Remove the USB Type-C bracket [2] from the system board.
    
20. Remove the nine 'M2.5*5' screws [1], three 'M2*3' screws [2] and remove the system board [3] from the computer.