Installing The System Board - Dell Latitude 3420 Service Manual

Steps
1. Remove the (M2.5x6) and the (M2.5x4) screws that secure the hinge to the palmrest assembly.
2. Lift the hinge in upward direction away from the palmrest assembly.
3. For 4G LTE enabled systems, peel the WWAN I/O board cable from the palmrest assembly.
4. Disconnect the speaker cable, power adapter port cable, hard-disk drive cable, and system fan cable from the connector on
the system board.
5. Open the latch and disconnect the touchpad cable, keyboard cable, and USB cable from the connector on the system board.
6. Peel the adhesive, open the latch, and disconnect the display cable and I/O cable from the connector on the system board.
7. Remove the two (M2x5) screws that secure the type-c bracket in place.
8. Lift and remove the type-c bracket from the system board.
9. Remove the two (M2x2) screws that secure the system board in place.
10. Lift and remove the system board from the palmrest assembly.

Installing the system board

Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
System board connectors
NOTE: The location of the memory module may vary depending on your system.
Removing and installing components 79