Latitude 7390 2-in-1 Owner's Manual

Removing system board

1. Follow the procedure in Before working inside your computer.
2. Remove the:
   1. Micro SD
   2. SIM card tray

      NOTE: : Remove both the cards if equipped and no need to remove the blank filler

   3. Base cover
   4. Battery
   5. SSD card
   6. WLAN card
   7. WWAN card
   8. Heatsink assembly
3. Disconnect the :
   1. IR camera and touchscreen cable [1].
   2. Remove the 2 (M 2 x 1.7L) screws that secure the eDP bracket and lift it away from the computer [2].
   3. Disconnect the eDP cable from the system board [3].
   4. Disconnect th G-sensor and eDP cables [4].
   
4. Disconnect the following cables from the system board .
   1. Touchpad cable
   2. USH cable
   3. LED board cable
   
5. To release the cables:
   1. Flip the coin cell battery to reveal the speaker cable [1].
   2. Disconnect the speaker cable from the system board [2].
   3. Disconnect the power board cable from the system board [3].
   
6. Peel the tapes that secure antenna cables and remove the cables from the routing clips.
   
7. To remove the system board:
   1. Remove the 2 (M 1.98 x 4) screws securing the USB Type-C bracket [1].
   2. Lift the USB Type-C bracket from the Type-C module [2].
   3. Remove the 6 (M2.0 x 3.0) screws that secure the system board to the computer [3].
   4. Lift the system board away from the computer[4].