Dell Latitude 7424 Rugged Extreme Service Manual

Installing the System board

1. Install the system board inserting the serial port on the system board through chassis [1] and install the nine 'M2.5*5' screws [2] and three 'M2*3' screws [3] on the system board.
   
2. NOTE When installing the System Board, technicians must ensure that both the battery cables (1st & 2nd Battery) and FPC cables (Left I/O FPC and Express Card reader FPC) are not pinched under the System Board.
   Install the USB Type-C bracket [1] and secure it with two 'M2.5*5' screws and two 'M1.6*3.0' screws on the system board [2].
   
3. Connect the power button cable [1] to the system board and secure it using a piece of tape [2].
4. Connect the USH board and touch pad cable [3] to the system board and secure it using a piece of tape [4].
   
5. Insert the left I/O FPC cable through the wall bridge[1] and connect it to the motherboard [2] securing it using a piece of tape [3].
6. Peel off the tape [4] on the express card FPC and connect it to the system board [5].
7. Stick the tape back on the connector on the system board [6] and secure it with some extra tape [7].
   
8. Connect the rear I/O FPC cable [1] to the system board and secure it using a piece of tape [2].
9. Connect the battery indicator LED cable [3] to the system board and secure it using a piece of tape [4].
10. Connect the docking port FPC cable [5] and secure it using a piece of tape [6].
    
11. Connect the EDP cable and place the EDP bracket on the connector [2].
12. Install the two the 'M2*3' screws securing the EDP cable to the system board [3].
    
13. Align and tuck the DC-In cable along the screw post [1] clearing the screw hole on the motherboard.
14. Connect the DC-In cable [2] and install the single 'M2*3' screw [3] on the system board.
    
15. Open both rear doors [1] and install the two epoxy cap screws in the rear I/O space [2].
    
16. Open both rear doors [1] and install the two epoxy cap screws on serial port [2] of the system board.
    
17. Connect the touch pad connectors to the system board [1] and secure it using a tape [2].
18. Connect the SSD-ODD assembly [3] and secure it using a piece of tape [4].
    
19. Install the:
    1. Rear I/O board
    2. Battery bay
    3. Primary SSD rail
    4. GPS module
    5. WWAN card
    6. WLAN card
    7. Memory
    8. Heatsink
    9. Secondary SSD
    10. Primary SSD
    11. Docking port assembly
    12. PCIe heatsink assembly
    13. Keyboard
    14. Bottom chassis cover
    15. Batteries
20. Follow the procedure in After working inside your computer.