Dell Latitude 7400 Service Manual

Installing the system board

1. Align and place the system board in the palmrest assembly [1]
2. Replace the two (M2x4) screws on the system board securing it to the palmrest assembly [2].
   

   NOTE For models shipped with a fingerprint reader or WWAN antennas, there are three (M2x4) screws securing the system board to the computer.
3. Place the USB Type-C bracket [1] on the system board and secure it using two (M2x5) screws [2] to the system board.
   
4. Install the DDR ESD bracket [1] on the system board and secure it using two (M2x2.5) screws to the system board [2]
   
5. Open the latch and connect the USH board cable [1] and the touchpad cable [2] to the system board.
   
6. Connect the coin cell [1], speaker cable [2], and the LED daughterboard ribbon cable [3] to the system board.
   
7. Install the metal bracket on the Darwin connector [1] and secure it to the palmrest using a single (M2x4) screw [2] to the system board.
   
8. Route the display cable through the metal bracket [1] and connect it to the system board [2].
   
9. Install the display cable bracket [1] on the EDP connector of the system board and secure it using a single (M2x3) screw [2].
   
10. Connect the power button (with finger print reader) cable to the system board [1].
11. Connect the Darwin WWAN antenna cables [2] to the the system board.