Dell Precision 3520 Owner's Manual

Removing the system board

1. Follow the procedure in Before working inside your computer.
2. Remove the:
   1. SIM card module
   2. base cover
   3. battery
   4. WLAN card
   5. SSD card
   6. memory module
   7. heat sink assembly
   8. chassis frame
3. To release the system board:
   1. emove the M2x5 screws that secures the metal bracket to the system board [1].
   2. Lift the metal bracket that secures the display cable to the system board [2].
   3. Disconnect the display cable from the connectors on the system board [3].
   4. 
      
   
4. To remove the system board:
   1. Lift the latch and disconnect the LED board, mother board and touchpad cable from the connectors on the system board [1].
   2. Remove the M2x5 screws that secure the metal USB-C port bracket to the system board and lift the bracket away from the system board [2,3].
   
5. Remove the M2x3 screws and lift the system board away from the computer [1, 2].